CVE-2025-22063 (GCVE-0-2025-22063)
Vulnerability from cvelistv5 – Published: 2025-04-16 14:12 – Updated: 2026-05-11 21:11
VLAI
EPSS
VEX
Title
netlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets
Summary
In the Linux kernel, the following vulnerability has been resolved:
netlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets
When calling netlbl_conn_setattr(), addr->sa_family is used
to determine the function behavior. If sk is an IPv4 socket,
but the connect function is called with an IPv6 address,
the function calipso_sock_setattr() is triggered.
Inside this function, the following code is executed:
sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL;
Since sk is an IPv4 socket, pinet6 is NULL, leading to a
null pointer dereference.
This patch fixes the issue by checking if inet6_sk(sk)
returns a NULL pointer before accessing pinet6.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 17:40 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
11 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
ceba1832b1b2da0149c51de62a847c00bca1677a , < 1ad9166cab6a0f5c0b10344a97bdf749ae11dcbf
(git)
Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 1e38f7a6cdd68377f8a4189b2fbaec14a6dd5152 (git) Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < a7e89541d05b98c79a51c0f95df020f8e82b62ed (git) Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 797e5371cf55463b4530bab3fef5f27f7c6657a8 (git) Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 1927d0bcd5b81e80971bf6b8eba267508bd1c78b (git) Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 3ba9cf69de50e8abed32b448616c313baa4c5712 (git) Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 9fe3839588db7519030377b7dee3f165e654f6c5 (git) Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 172a8a996a337206970467e871dd995ac07640b1 (git) Affected: ceba1832b1b2da0149c51de62a847c00bca1677a , < 078aabd567de3d63d37d7673f714e309d369e6e2 (git) |
guessed | |
| Linux | Linux |
Affected:
4.8
Unaffected: 0 , < 4.8 (semver) Unaffected: 5.4.292 , ≤ 5.4.* (semver) Unaffected: 5.10.236 , ≤ 5.10.* (semver) Unaffected: 5.15.180 , ≤ 5.15.* (semver) Unaffected: 6.1.134 , ≤ 6.1.* (semver) Unaffected: 6.6.87 , ≤ 6.6.* (semver) Unaffected: 6.12.23 , ≤ 6.12.* (semver) Unaffected: 6.13.11 , ≤ 6.13.* (semver) Unaffected: 6.14.2 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netlabel: Se corrige la excepci\u00f3n de puntero nulo causada por CALIPSO en sockets IPv4. Al llamar a netlbl_conn_setattr(), se utiliza addr-\u0026gt;sa_family para determinar el comportamiento de la funci\u00f3n. Si sk es un socket IPv4, pero se llama a la funci\u00f3n connect con una direcci\u00f3n IPv6, se activa la funci\u00f3n calipso_sock_setattr(). Dentro de esta funci\u00f3n, se ejecuta el siguiente c\u00f3digo: sk_fullsock(__sk) ? inet_sk(__sk)-\u0026gt;pinet6 : NULL; Dado que sk es un socket IPv4, pinet6 es NULL, lo que provoca una desreferencia de puntero nulo. Este parche corrige el problema comprobando si inet6_sk(sk) devuelve un puntero nulo antes de acceder a pinet6."
}
],
"id": "CVE-2025-22063",
"lastModified": "2026-06-17T08:44:57.820",
"metrics": {
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},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
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{
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"value": "CWE-476"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-09-11T10:21:01+00:00",
"cve": "CVE-2025-22063",
"id": "CVE-2025-22063",
"initial_release_date": "2025-04-16T00:00:00+00:00",
"product_status:known_affected": "232",
"product_status:known_not_affected": "42",
"product_status:under_investigation": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: netlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-22063.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-12T16:51:58Z",
"cve": "CVE-2025-22063",
"id": "CVE-2025-22063",
"initial_release_date": "2025-04-18T01:23:50Z",
"product_status:known_affected": "731",
"product_status:known_not_affected": "36",
"product_status:recommended": "423",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-22063",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-22063.json",
"version": "39"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2025-11-03T19:41:48.111Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
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"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2025-22063",
"options": [
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},
{
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2025-10-01T17:40:57.902233Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-476",
"description": "CWE-476 NULL Pointer Dereference",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-01T14:40:58.485Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
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"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "ceba1832b1b2da0149c51de62a847c00bca1677a",
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},
{
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"status": "affected",
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},
{
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"status": "affected",
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},
{
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{
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}
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},
{
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"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"version": "4.8"
},
{
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"status": "unaffected",
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},
{
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"version": "5.4.292",
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},
{
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"status": "unaffected",
"version": "5.10.236",
"versionType": "semver"
},
{
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"version": "5.15.180",
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},
{
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"status": "unaffected",
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},
{
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},
{
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},
{
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"status": "unaffected",
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"versionType": "semver"
},
{
"lessThanOrEqual": "6.14.*",
"status": "unaffected",
"version": "6.14.2",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.15",
"versionType": "original_commit_for_fix"
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}
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},
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}
],
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets\n\nWhen calling netlbl_conn_setattr(), addr-\u003esa_family is used\nto determine the function behavior. If sk is an IPv4 socket,\nbut the connect function is called with an IPv6 address,\nthe function calipso_sock_setattr() is triggered.\nInside this function, the following code is executed:\n\nsk_fullsock(__sk) ? inet_sk(__sk)-\u003epinet6 : NULL;\n\nSince sk is an IPv4 socket, pinet6 is NULL, leading to a\nnull pointer dereference.\n\nThis patch fixes the issue by checking if inet6_sk(sk)\nreturns a NULL pointer before accessing pinet6."
}
],
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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},
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},
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},
{
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},
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},
{
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},
{
"url": "https://git.kernel.org/stable/c/172a8a996a337206970467e871dd995ac07640b1"
},
{
"url": "https://git.kernel.org/stable/c/078aabd567de3d63d37d7673f714e309d369e6e2"
}
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"title": "netlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets",
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"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-22063",
"datePublished": "2025-04-16T14:12:18.222Z",
"dateReserved": "2024-12-29T08:45:45.813Z",
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"state": "PUBLISHED"
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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