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1490 vulnerabilities by freebsd
CERTFR-2026-AVI-0716
Vulnerability from certfr_avis - Published: 2026-06-10 - Updated: 2026-06-12
De multiples vulnérabilités ont été découvertes dans FreeBSD. Elles permettent à un attaquant de provoquer une élévation de privilèges.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| FreeBSD | FreeBSD | FreeBSD branche 14.4 versions antérieures à 14.4-n273719 | ||
| FreeBSD | FreeBSD | FreeBSD branche 14.3 versions antérieures à 14.3-n271519 | ||
| FreeBSD | FreeBSD | FreeBSD branche 14 versions antérieures à 14-n274315 | ||
| FreeBSD | FreeBSD | FreeBSD branche 15 versions antérieures à 15-n283886 | ||
| FreeBSD | FreeBSD | FreeBSD branche 15.1 versions antérieures à 15.1-n283555 | ||
| FreeBSD | FreeBSD | FreeBSD branche 15.0 versions antérieures à 15.0-n281057 |
References
| Title | Publication Time | Tags | ||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "FreeBSD branche 14.4 versions ant\u00e9rieures \u00e0 14.4-n273719",
"product": {
"name": "FreeBSD",
"vendor": {
"name": "FreeBSD",
"scada": false
}
}
},
{
"description": "FreeBSD branche 14.3 versions ant\u00e9rieures \u00e0 14.3-n271519",
"product": {
"name": "FreeBSD",
"vendor": {
"name": "FreeBSD",
"scada": false
}
}
},
{
"description": "FreeBSD branche 14 versions ant\u00e9rieures \u00e0 14-n274315",
"product": {
"name": "FreeBSD",
"vendor": {
"name": "FreeBSD",
"scada": false
}
}
},
{
"description": "FreeBSD branche 15 versions ant\u00e9rieures \u00e0 15-n283886",
"product": {
"name": "FreeBSD",
"vendor": {
"name": "FreeBSD",
"scada": false
}
}
},
{
"description": "FreeBSD branche 15.1 versions ant\u00e9rieures \u00e0 15.1-n283555",
"product": {
"name": "FreeBSD",
"vendor": {
"name": "FreeBSD",
"scada": false
}
}
},
{
"description": "FreeBSD branche 15.0 versions ant\u00e9rieures \u00e0 15.0-n281057",
"product": {
"name": "FreeBSD",
"vendor": {
"name": "FreeBSD",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-45257",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-45257"
},
{
"name": "CVE-2026-49413",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-49413"
}
],
"initial_release_date": "2026-06-10T00:00:00",
"last_revision_date": "2026-06-12T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0716",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-06-10T00:00:00.000000"
},
{
"description": "Ajout du bulletin de s\u00e9curit\u00e9 FreeBSD FreeBSD-SA-26:26 du 9 juin 2026.",
"revision_date": "2026-06-12T00:00:00.000000"
}
],
"risks": [
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans FreeBSD. Elles permettent \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans FreeBSD",
"vendor_advisories": [
{
"published_at": "2026-06-09",
"title": "Bulletin de s\u00e9curit\u00e9 FreeBSD FreeBSD-SA-26:26",
"url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-26:26.ktls.asc"
},
{
"published_at": "2026-06-09",
"title": "Bulletin de s\u00e9curit\u00e9 FreeBSD FreeBSD-SA-26:30",
"url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-26:30.linux.asc"
}
]
}
CVE-2026-45255 (GCVE-0-2026-45255)
Vulnerability from nvd – Published: 2026-05-21 09:27 – Updated: 2026-05-22 03:55
VLAI
Title
Remote code execution via installer Wi-Fi access point scans
Summary
When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to select a network. This is implemented using a shell script, and the code which handled network names was not careful to prevent expansion by the shell. As a result, a suitably crafted network name can be used to execute commands via a subshell.
The problem can be exploited to execute code as root on the system running bsdinstall or bsdconfig. The attacker would need to create an access point with a specially crafted name and be within range of a Wi-Fi scan. Note that bsdinstall and bsdconfig are vulnerable as soon as the user prompts them to scan for nearby networks; they do not need to actually select the malicious network.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-05-20 23:00
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
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"id": "CVE-2026-45255",
"options": [
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{
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{
"Technical Impact": "total"
}
],
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"timestamp": "2026-05-21T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
}
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"providerMetadata": {
"dateUpdated": "2026-05-22T03:55:39.175Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"modules": [
"bsdinstall"
],
"product": "FreeBSD",
"vendor": "FreeBSD",
"versions": [
{
"lessThan": "p9",
"status": "affected",
"version": "15.0-RELEASE",
"versionType": "release"
},
{
"lessThan": "p5",
"status": "affected",
"version": "14.4-RELEASE",
"versionType": "release"
},
{
"lessThan": "p14",
"status": "affected",
"version": "14.3-RELEASE",
"versionType": "release"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Austin Ralls"
}
],
"datePublic": "2026-05-20T23:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to select a network. This is implemented using a shell script, and the code which handled network names was not careful to prevent expansion by the shell. As a result, a suitably crafted network name can be used to execute commands via a subshell.\n\nThe problem can be exploited to execute code as root on the system running bsdinstall or bsdconfig. The attacker would need to create an access point with a specially crafted name and be within range of a Wi-Fi scan. Note that bsdinstall and bsdconfig are vulnerable as soon as the user prompts them to scan for nearby networks; they do not need to actually select the malicious network."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-78",
"description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-21T09:27:20.431Z",
"orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
"shortName": "freebsd"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:23.bsdinstall.asc"
}
],
"title": "Remote code execution via installer Wi-Fi access point scans",
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
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"assignerShortName": "freebsd",
"cveId": "CVE-2026-45255",
"datePublished": "2026-05-21T09:27:20.431Z",
"dateReserved": "2026-05-11T16:27:44.891Z",
"dateUpdated": "2026-05-22T03:55:39.175Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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}
CVE-2026-45254 (GCVE-0-2026-45254)
Vulnerability from nvd – Published: 2026-05-21 09:34 – Updated: 2026-05-21 14:37
VLAI
Title
Incorrect libcap_net limitation list manipulation
Summary
In the case of the cap_net service, when a key present in the old limit was omitted from the new limit, the missing key was treated as "allow any" instead of being rejected.
In certain scenarios, an application that had previously restricted a subset of network operations could ask for a new limit that extended the permissions of the process.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-05-20 23:00
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-45254",
"options": [
{
"Exploitation": "none"
},
{
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},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-21T14:35:55.800907Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-21T14:37:03.795Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"modules": [
"libcap_net"
],
"product": "FreeBSD",
"vendor": "FreeBSD",
"versions": [
{
"lessThan": "p9",
"status": "affected",
"version": "15.0-RELEASE",
"versionType": "release"
},
{
"lessThan": "p5",
"status": "affected",
"version": "14.4-RELEASE",
"versionType": "release"
},
{
"lessThan": "p14",
"status": "affected",
"version": "14.3-RELEASE",
"versionType": "release"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Joshua Rogers of AISLE Research Team"
}
],
"datePublic": "2026-05-20T23:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "In the case of the cap_net service, when a key present in the old limit was omitted from the new limit, the missing key was treated as \"allow any\" instead of being rejected.\n\nIn certain scenarios, an application that had previously restricted a subset of network operations could ask for a new limit that extended the permissions of the process."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-269",
"description": "CWE-269 Improper Privilege Management",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-21T09:34:37.541Z",
"orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
"shortName": "freebsd"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:24.cap_net.asc"
}
],
"title": "Incorrect libcap_net limitation list manipulation",
"x_generator": {
"engine": "cvelib 1.8.0"
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}
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"cveMetadata": {
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"cveId": "CVE-2026-45254",
"datePublished": "2026-05-21T09:34:37.541Z",
"dateReserved": "2026-05-11T16:27:44.891Z",
"dateUpdated": "2026-05-21T14:37:03.795Z",
"state": "PUBLISHED"
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CVE-2026-45253 (GCVE-0-2026-45253)
Vulnerability from nvd – Published: 2026-05-21 09:17 – Updated: 2026-05-22 03:55
VLAI
Title
Missing validation in ptrace(PT_SC_REMOTE)
Summary
ptrace(PT_SC_REMOTE) failed to properly validate parameters for the syscall(2) and __syscall(2) meta-system calls. As a result, a user with the ability to debug a process may trigger arbitrary code execution in the kernel, even if the target process has no special privileges.
The missing validation allows an unprivileged local user to escalate privileges, potentially gaining full control of the affected system.
Severity
8.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-05-20 23:00
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-45253",
"options": [
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{
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}
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"role": "CISA Coordinator",
"timestamp": "2026-05-21T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
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"providerMetadata": {
"dateUpdated": "2026-05-22T03:55:37.047Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"modules": [
"ptrace"
],
"product": "FreeBSD",
"vendor": "FreeBSD",
"versions": [
{
"lessThan": "p9",
"status": "affected",
"version": "15.0-RELEASE",
"versionType": "release"
},
{
"lessThan": "p5",
"status": "affected",
"version": "14.4-RELEASE",
"versionType": "release"
},
{
"lessThan": "p14",
"status": "affected",
"version": "14.3-RELEASE",
"versionType": "release"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Yuxiang Yang, Yizhou Zhao, Ao Wang, Xuewei Feng, Qi Li, and Ke Xu from Tsinghua University using GLM-5.1 from Z.ai"
},
{
"lang": "en",
"type": "finder",
"value": "Ryan at Calif.io"
}
],
"datePublic": "2026-05-20T23:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "ptrace(PT_SC_REMOTE) failed to properly validate parameters for the syscall(2) and __syscall(2) meta-system calls. As a result, a user with the ability to debug a process may trigger arbitrary code execution in the kernel, even if the target process has no special privileges.\n\nThe missing validation allows an unprivileged local user to escalate privileges, potentially gaining full control of the affected system."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787: Out-of-bounds Write",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
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"orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
"shortName": "freebsd"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:21.ptrace.asc"
}
],
"title": "Missing validation in ptrace(PT_SC_REMOTE)",
"x_generator": {
"engine": "cvelib 1.8.0"
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}
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"assignerShortName": "freebsd",
"cveId": "CVE-2026-45253",
"datePublished": "2026-05-21T09:17:29.232Z",
"dateReserved": "2026-05-11T16:27:44.891Z",
"dateUpdated": "2026-05-22T03:55:37.047Z",
"state": "PUBLISHED"
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CVE-2026-45252 (GCVE-0-2026-45252)
Vulnerability from nvd – Published: 2026-05-21 09:08 – Updated: 2026-05-21 13:47
VLAI
Title
Heap overflow in FUSE_LISTXATTR
Summary
When a fusefs file system implements extended attributes, the kernel may send a FUSE_LISTXATTR message to the userspace daemon to retrieve the list of extended attributes for a given file. The FUSE protocol requires the daemon to return a packed list of NUL-terminated strings. The fusefs kernel module calls strlen() on this daemon-supplied buffer without first verifying that the entire list is NUL-terminated.
If a malicious daemon sends a non-NUL-terminated list, the fusefs kernel module may read beyond the end of one heap-allocated buffer and potentially write beyond the end of a second buffer. A malicious daemon could disclose up to 253 bytes of kernel heap memory, or it could inject up to 250 attacker-controlled bytes into unallocated kernel heap space.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-05-20 23:00
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
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"id": "CVE-2026-45252",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-21T13:46:56.283986Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-21T13:47:03.794Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"modules": [
"fusefs"
],
"product": "FreeBSD",
"vendor": "FreeBSD",
"versions": [
{
"lessThan": "p9",
"status": "affected",
"version": "15.0-RELEASE",
"versionType": "release"
},
{
"lessThan": "p5",
"status": "affected",
"version": "14.4-RELEASE",
"versionType": "release"
},
{
"lessThan": "p14",
"status": "affected",
"version": "14.3-RELEASE",
"versionType": "release"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Joshua Rogers of AISLE Research Team"
}
],
"datePublic": "2026-05-20T23:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "When a fusefs file system implements extended attributes, the kernel may send a FUSE_LISTXATTR message to the userspace daemon to retrieve the list of extended attributes for a given file. The FUSE protocol requires the daemon to return a packed list of NUL-terminated strings. The fusefs kernel module calls strlen() on this daemon-supplied buffer without first verifying that the entire list is NUL-terminated.\n\nIf a malicious daemon sends a non-NUL-terminated list, the fusefs kernel module may read beyond the end of one heap-allocated buffer and potentially write beyond the end of a second buffer. A malicious daemon could disclose up to 253 bytes of kernel heap memory, or it could inject up to 250 attacker-controlled bytes into unallocated kernel heap space."
}
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CVE-2026-45251 (GCVE-0-2026-45251)
Vulnerability from nvd – Published: 2026-05-21 09:04 – Updated: 2026-05-22 03:55
VLAI
Title
Kernel use-after-free via file descriptor syscalls
Summary
A file descriptor can be closed while a thread is blocked in a poll(2) or select(2) call waiting for that descriptor. Because the blocked thread does not hold a reference to the underlying object, this closure may result in the object being freed while the thread remains blocked. In this situation, the kernel must remove the blocked thread from the per-object wait queue prior to freeing the object.
In the case of some file descriptor types, the kernel failed to unlink blocked threads from the object before freeing it. When the blocked thread is subsequently woken, it accesses memory that has already been freed resulting in a use-after-free vulnerability.
The use-after-free vulnerability may be triggered by an unprivileged local user and can be exploited to obtain superuser privileges.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-05-20 23:00
Credits
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CVE-2026-39461 (GCVE-0-2026-39461)
Vulnerability from nvd – Published: 2026-05-21 09:20 – Updated: 2026-05-22 03:55
VLAI
Title
select(2) file descriptor set overflow causes stack overflow
Summary
libcasper(3) communicates with helper processes via UNIX domain sockets, and uses the select(2) system call to wait for data to become available. However, it does not verify that its socket descriptor fits within select(2)'s descriptor set size limit of FD_SETSIZE (1024).
An attacker able to cause an application using libcasper(3) to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, may trigger stack corruption. If the target application runs with setuid root privileges, this could be used to escalate local privileges.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-05-20 23:00
Credits
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CVE-2026-45250 (GCVE-0-2026-45250)
Vulnerability from nvd – Published: 2026-05-21 08:37 – Updated: 2026-05-22 07:11
VLAI
Title
Stack buffer overflow via setcred(2)
Summary
The setcred(2) system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capacity of that buffer, a stack buffer overflow occurs.
Because the bounds check on the supplementary groups list occurs after the kernel stack buffer has already been written, an unprivileged local user may trigger the overflow without holding any special privilege. Successful exploitation may allow an attacker to execute arbitrary code in the context of the kernel, allowing an unprivileged local user to gain elevated privileges on the affected system.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Date Public
2026-05-20 23:00
Credits
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CVE-2026-42512 (GCVE-0-2026-42512)
Vulnerability from nvd – Published: 2026-04-30 07:58 – Updated: 2026-05-01 15:26
VLAI
Title
Remotely triggerable out-of-bounds heap write in dhclient
Summary
As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers. The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer overrun.
A specially crafted packet can cause dhclient to overrun its buffer of environment entries. This can result in a crash, but it may be possible to leverage this bug to achieve remote code execution.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-29 19:00
Credits
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CVE-2026-39457 (GCVE-0-2026-39457)
Vulnerability from nvd – Published: 2026-04-30 08:01 – Updated: 2026-05-01 03:55
VLAI
Title
Stack overflow via select() file descriptor set overflow
Summary
When exchanging data over a socket, libnv uses select(2) to wait for data to arrive. However, it does not verify whether the provided socket descriptor fits in select(2)'s file descriptor set size limit of FD_SETSIZE (1024).
An attacker who is able to force a libnv application to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, can trigger stack corruption. If the target application is setuid-root, then this could be used to elevate local privileges.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-29 19:00
Credits
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CVE-2026-35547 (GCVE-0-2026-35547)
Vulnerability from nvd – Published: 2026-04-30 08:08 – Updated: 2026-05-01 15:26
VLAI
Title
Heap overflow in libnv
Summary
When processing the header of an incoming message, libnv failed to properly validate the message size.
The lack of validation allows a malicious program to write outside the bounds of a heap allocation. This can trigger a crash or system panic, and it may be possible for an unprivileged user to exploit the bug to elevate their privileges.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-29 19:00
Credits
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CVE-2026-7164 (GCVE-0-2026-7164)
Vulnerability from nvd – Published: 2026-04-30 07:23 – Updated: 2026-04-30 13:09
VLAI
Title
pf can overflow the stack parsing crafted SCTP packets
Summary
Incorrect packet validation allowed unbounded recursion parsing SCTP chunk parameters. This can eventually result in a stack overflow and panic.
Remote attackers can craft packets which cause affected systems to panic. This affects any system where pf is configured to process traffic, independent of the configured ruleset.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-29 19:00
Credits
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CVE-2026-7270 (GCVE-0-2026-7270)
Vulnerability from nvd – Published: 2026-04-30 07:02 – Updated: 2026-05-10 06:55
VLAI
Title
Local privilege escalation via execve()
Summary
An operator precedence bug in the kernel results in a scenario where a buffer overflow causes attacker-controlled data to overwrite adjacent execve(2) argument buffers.
The bug may be exploitable by an unprivileged user to obtain superuser privileges.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-783 - Operator Precedence Logic Error
Assigner
References
3 references
Impacted products
Date Public
2026-04-29 19:00
Credits
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CVE-2026-42511 (GCVE-0-2026-42511)
Vulnerability from nvd – Published: 2026-04-30 06:56 – Updated: 2026-05-01 15:25
VLAI
Title
Remote code execution via malicious DHCP options
Summary
The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives. When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it.
A rogue DHCP server may be able to execute arbirary code as root on a system running dhclient.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-149 - Improper Neutralization of Quoting Syntax
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-29 19:00
Credits
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CVE-2026-6386 (GCVE-0-2026-6386)
Vulnerability from nvd – Published: 2026-04-22 02:33 – Updated: 2026-04-22 14:32
VLAI
Title
Missing large page handling in pmap_pkru_update_range()
Summary
In order to apply a particular protection key to an address range, the kernel must update the corresponding page table entries. The subroutine which handled this failed to take into account the presence of 1GB largepage mappings created using the shm_create_largepage(3) interface. In particular, it would always treat a page directory page entry as pointing to another page table page.
The bug can be abused by an unprivileged user to cause pmap_pkru_update_range() to treat userspace memory as a page table page, and thus overwrite memory to which the application would otherwise not have access.
Severity
6.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-21 18:00
Credits
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CVE-2026-5398 (GCVE-0-2026-5398)
Vulnerability from nvd – Published: 2026-04-22 02:23 – Updated: 2026-04-23 03:56
VLAI
Title
Kernel use-after-free bug in the TIOCNOTTY handler
Summary
The implementation of TIOCNOTTY failed to clear a back-pointer from the structure representing the controlling terminal to the calling process' session. If the invoking process then exits, the terminal structure may end up containing a pointer to freed memory.
A malicious process can abuse the dangling pointer to grant itself root privileges.
Severity
8.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-21 18:00
Credits
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CVE-2026-45254 (GCVE-0-2026-45254)
Vulnerability from cvelistv5 – Published: 2026-05-21 09:34 – Updated: 2026-05-21 14:37
VLAI
Title
Incorrect libcap_net limitation list manipulation
Summary
In the case of the cap_net service, when a key present in the old limit was omitted from the new limit, the missing key was treated as "allow any" instead of being rejected.
In certain scenarios, an application that had previously restricted a subset of network operations could ask for a new limit that extended the permissions of the process.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-05-20 23:00
Credits
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CVE-2026-45255 (GCVE-0-2026-45255)
Vulnerability from cvelistv5 – Published: 2026-05-21 09:27 – Updated: 2026-05-22 03:55
VLAI
Title
Remote code execution via installer Wi-Fi access point scans
Summary
When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to select a network. This is implemented using a shell script, and the code which handled network names was not careful to prevent expansion by the shell. As a result, a suitably crafted network name can be used to execute commands via a subshell.
The problem can be exploited to execute code as root on the system running bsdinstall or bsdconfig. The attacker would need to create an access point with a specially crafted name and be within range of a Wi-Fi scan. Note that bsdinstall and bsdconfig are vulnerable as soon as the user prompts them to scan for nearby networks; they do not need to actually select the malicious network.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-05-20 23:00
Credits
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CVE-2026-39461 (GCVE-0-2026-39461)
Vulnerability from cvelistv5 – Published: 2026-05-21 09:20 – Updated: 2026-05-22 03:55
VLAI
Title
select(2) file descriptor set overflow causes stack overflow
Summary
libcasper(3) communicates with helper processes via UNIX domain sockets, and uses the select(2) system call to wait for data to become available. However, it does not verify that its socket descriptor fits within select(2)'s descriptor set size limit of FD_SETSIZE (1024).
An attacker able to cause an application using libcasper(3) to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, may trigger stack corruption. If the target application runs with setuid root privileges, this could be used to escalate local privileges.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-05-20 23:00
Credits
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CVE-2026-45253 (GCVE-0-2026-45253)
Vulnerability from cvelistv5 – Published: 2026-05-21 09:17 – Updated: 2026-05-22 03:55
VLAI
Title
Missing validation in ptrace(PT_SC_REMOTE)
Summary
ptrace(PT_SC_REMOTE) failed to properly validate parameters for the syscall(2) and __syscall(2) meta-system calls. As a result, a user with the ability to debug a process may trigger arbitrary code execution in the kernel, even if the target process has no special privileges.
The missing validation allows an unprivileged local user to escalate privileges, potentially gaining full control of the affected system.
Severity
8.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-05-20 23:00
Credits
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CVE-2026-45252 (GCVE-0-2026-45252)
Vulnerability from cvelistv5 – Published: 2026-05-21 09:08 – Updated: 2026-05-21 13:47
VLAI
Title
Heap overflow in FUSE_LISTXATTR
Summary
When a fusefs file system implements extended attributes, the kernel may send a FUSE_LISTXATTR message to the userspace daemon to retrieve the list of extended attributes for a given file. The FUSE protocol requires the daemon to return a packed list of NUL-terminated strings. The fusefs kernel module calls strlen() on this daemon-supplied buffer without first verifying that the entire list is NUL-terminated.
If a malicious daemon sends a non-NUL-terminated list, the fusefs kernel module may read beyond the end of one heap-allocated buffer and potentially write beyond the end of a second buffer. A malicious daemon could disclose up to 253 bytes of kernel heap memory, or it could inject up to 250 attacker-controlled bytes into unallocated kernel heap space.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-05-20 23:00
Credits
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CVE-2026-45251 (GCVE-0-2026-45251)
Vulnerability from cvelistv5 – Published: 2026-05-21 09:04 – Updated: 2026-05-22 03:55
VLAI
Title
Kernel use-after-free via file descriptor syscalls
Summary
A file descriptor can be closed while a thread is blocked in a poll(2) or select(2) call waiting for that descriptor. Because the blocked thread does not hold a reference to the underlying object, this closure may result in the object being freed while the thread remains blocked. In this situation, the kernel must remove the blocked thread from the per-object wait queue prior to freeing the object.
In the case of some file descriptor types, the kernel failed to unlink blocked threads from the object before freeing it. When the blocked thread is subsequently woken, it accesses memory that has already been freed resulting in a use-after-free vulnerability.
The use-after-free vulnerability may be triggered by an unprivileged local user and can be exploited to obtain superuser privileges.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-05-20 23:00
Credits
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CVE-2026-45250 (GCVE-0-2026-45250)
Vulnerability from cvelistv5 – Published: 2026-05-21 08:37 – Updated: 2026-05-22 07:11
VLAI
Title
Stack buffer overflow via setcred(2)
Summary
The setcred(2) system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capacity of that buffer, a stack buffer overflow occurs.
Because the bounds check on the supplementary groups list occurs after the kernel stack buffer has already been written, an unprivileged local user may trigger the overflow without holding any special privilege. Successful exploitation may allow an attacker to execute arbitrary code in the context of the kernel, allowing an unprivileged local user to gain elevated privileges on the affected system.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Date Public
2026-05-20 23:00
Credits
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CVE-2026-35547 (GCVE-0-2026-35547)
Vulnerability from cvelistv5 – Published: 2026-04-30 08:08 – Updated: 2026-05-01 15:26
VLAI
Title
Heap overflow in libnv
Summary
When processing the header of an incoming message, libnv failed to properly validate the message size.
The lack of validation allows a malicious program to write outside the bounds of a heap allocation. This can trigger a crash or system panic, and it may be possible for an unprivileged user to exploit the bug to elevate their privileges.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-29 19:00
Credits
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CVE-2026-39457 (GCVE-0-2026-39457)
Vulnerability from cvelistv5 – Published: 2026-04-30 08:01 – Updated: 2026-05-01 03:55
VLAI
Title
Stack overflow via select() file descriptor set overflow
Summary
When exchanging data over a socket, libnv uses select(2) to wait for data to arrive. However, it does not verify whether the provided socket descriptor fits in select(2)'s file descriptor set size limit of FD_SETSIZE (1024).
An attacker who is able to force a libnv application to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, can trigger stack corruption. If the target application is setuid-root, then this could be used to elevate local privileges.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-29 19:00
Credits
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CVE-2026-42512 (GCVE-0-2026-42512)
Vulnerability from cvelistv5 – Published: 2026-04-30 07:58 – Updated: 2026-05-01 15:26
VLAI
Title
Remotely triggerable out-of-bounds heap write in dhclient
Summary
As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers. The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer overrun.
A specially crafted packet can cause dhclient to overrun its buffer of environment entries. This can result in a crash, but it may be possible to leverage this bug to achieve remote code execution.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-29 19:00
Credits
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CVE-2026-7164 (GCVE-0-2026-7164)
Vulnerability from cvelistv5 – Published: 2026-04-30 07:23 – Updated: 2026-04-30 13:09
VLAI
Title
pf can overflow the stack parsing crafted SCTP packets
Summary
Incorrect packet validation allowed unbounded recursion parsing SCTP chunk parameters. This can eventually result in a stack overflow and panic.
Remote attackers can craft packets which cause affected systems to panic. This affects any system where pf is configured to process traffic, independent of the configured ruleset.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-29 19:00
Credits
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CVE-2026-7270 (GCVE-0-2026-7270)
Vulnerability from cvelistv5 – Published: 2026-04-30 07:02 – Updated: 2026-05-10 06:55
VLAI
Title
Local privilege escalation via execve()
Summary
An operator precedence bug in the kernel results in a scenario where a buffer overflow causes attacker-controlled data to overwrite adjacent execve(2) argument buffers.
The bug may be exploitable by an unprivileged user to obtain superuser privileges.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-783 - Operator Precedence Logic Error
Assigner
References
3 references
Impacted products
Date Public
2026-04-29 19:00
Credits
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CVE-2026-42511 (GCVE-0-2026-42511)
Vulnerability from cvelistv5 – Published: 2026-04-30 06:56 – Updated: 2026-05-01 15:25
VLAI
Title
Remote code execution via malicious DHCP options
Summary
The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives. When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it.
A rogue DHCP server may be able to execute arbirary code as root on a system running dhclient.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-149 - Improper Neutralization of Quoting Syntax
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-29 19:00
Credits
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"value": "The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives. When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it.\n\nA rogue DHCP server may be able to execute arbirary code as root on a system running dhclient."
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CVE-2026-6386 (GCVE-0-2026-6386)
Vulnerability from cvelistv5 – Published: 2026-04-22 02:33 – Updated: 2026-04-22 14:32
VLAI
Title
Missing large page handling in pmap_pkru_update_range()
Summary
In order to apply a particular protection key to an address range, the kernel must update the corresponding page table entries. The subroutine which handled this failed to take into account the presence of 1GB largepage mappings created using the shm_create_largepage(3) interface. In particular, it would always treat a page directory page entry as pointing to another page table page.
The bug can be abused by an unprivileged user to cause pmap_pkru_update_range() to treat userspace memory as a page table page, and thus overwrite memory to which the application would otherwise not have access.
Severity
6.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-04-21 18:00
Credits
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