CVE-2024-35864 (GCVE-0-2024-35864)
Vulnerability from cvelistv5 – Published: 2024-05-19 08:34 – Updated: 2026-08-05 11:30
VLAI
EPSS
VEX
Title
smb: client: fix potential UAF in smb2_is_valid_lease_break()
Summary
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential UAF in smb2_is_valid_lease_break()
Skip sessions that are being teared down (status == SES_EXITING) to
avoid UAF.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-29 18:32 UTC
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
7f48558e6489d032b1584b0cc9ac4bb11072c034 , < c868cabdf6fdd61bea54532271f4708254e57fc5
(git)
Affected: 7f48558e6489d032b1584b0cc9ac4bb11072c034 , < f92739fdd4522c4291277136399353d7c341fae4 (git) Affected: 7f48558e6489d032b1584b0cc9ac4bb11072c034 , < a8344e2b69bde63f713b0aa796d70dbeadffddfb (git) Affected: 7f48558e6489d032b1584b0cc9ac4bb11072c034 , < 705c76fbf726c7a2f6ff9143d4013b18daaaebf1 (git) Affected: a67172a013953664b1dad03c648200c70b90506c (git) Affected: 3.12.48 , < 3.13 (semver) |
guessed | |
| Linux | Linux |
Affected:
3.13
Unaffected: 0 , < 3.13 (semver) Unaffected: 6.1.85 , ≤ 6.1.* (semver) Unaffected: 6.6.26 , ≤ 6.6.* (semver) Unaffected: 6.8.5 , ≤ 6.8.* (semver) Unaffected: 6.9 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2024-35864",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-05-29T18:32:19.453857Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-06-04T17:34:05.415Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2024-08-02T03:21:48.471Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/c868cabdf6fdd61bea54532271f4708254e57fc5"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/f92739fdd4522c4291277136399353d7c341fae4"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/a8344e2b69bde63f713b0aa796d70dbeadffddfb"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.kernel.org/stable/c/705c76fbf726c7a2f6ff9143d4013b18daaaebf1"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/smb/client/smb2misc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "c868cabdf6fdd61bea54532271f4708254e57fc5",
"status": "affected",
"version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
"versionType": "git"
},
{
"lessThan": "f92739fdd4522c4291277136399353d7c341fae4",
"status": "affected",
"version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
"versionType": "git"
},
{
"lessThan": "a8344e2b69bde63f713b0aa796d70dbeadffddfb",
"status": "affected",
"version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
"versionType": "git"
},
{
"lessThan": "705c76fbf726c7a2f6ff9143d4013b18daaaebf1",
"status": "affected",
"version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
"versionType": "git"
},
{
"status": "affected",
"version": "a67172a013953664b1dad03c648200c70b90506c",
"versionType": "git"
},
{
"lessThan": "3.13",
"status": "affected",
"version": "3.12.48",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/smb/client/smb2misc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.13"
},
{
"lessThan": "3.13",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.85",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.26",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.8.*",
"status": "unaffected",
"version": "6.8.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.9",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.85",
"versionStartIncluding": "3.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.26",
"versionStartIncluding": "3.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.8.5",
"versionStartIncluding": "3.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.9",
"versionStartIncluding": "3.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.12.48",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential UAF in smb2_is_valid_lease_break()\n\nSkip sessions that are being teared down (status == SES_EXITING) to\navoid UAF."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - The vulnerable loop is entered only from `cifs_demultiplex_thread()` processing an unsolicited SMB2 lease-break frame received from the remote SMB server over TCP/445, which routinely traverses the internet (e.g. Azure Files and other cloud SMB shares). A malicious or compromised server, or an on-path attacker injecting into the stream, delivers the trigger entirely as network data.\nAC:L - The attacker controls both sides of the race \u2014 it forces session teardown (session-expired/user-session-deleted status codes, TCP reset driving reconnect, DFS IPC churn) and then floods lease-break notifications \u2014 and it can stall the SMB2 LOGOFF reply so the session lingers in SES_EXITING on `smb_ses_list` for the entire request timeout, making the window arbitrarily wide and repeatable.\nPR:N - Unsolicited oplock/lease-break frames bypass `smb2_verify_signature()` entirely and the handler ignores SessionId/TreeId, matching only on the attacker-supplied LeaseKey, so no credentials on the client and no authenticated SMB session are needed to reach the vulnerable traversal.\nUI:N - In the realistic deployment \u2014 a persistent cifs mount from fstab, autofs, or a container volume \u2014 the connection already exists, and the compromised server or on-path injector triggers the code path with no action from any local user.\nS:U - The use-after-free corrupts kernel heap memory belonging to the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Walking a torn-down session\u0027s `tcon_list` and `pending_opens` dereferences freed slab objects whose contents the attacker can groom via heap spraying, turning `tcon-\u003ecfids`, `open-\u003etlink`, and `open-\u003elease_key` into attacker-influenced pointers that yield a kernel memory read primitive.\nI:H - The path writes into the freed memory \u2014 `spin_lock(\u0026tcon-\u003eopen_file_lock)`, `cifs_stats_inc()` counter increments, and `cifs_get_tlink()` refcount bumps \u2014 and later frees/queues work (`queue_work(cifsiod_wq, \u0026cfid-\u003elease_break)`) through sprayed pointers, giving heap corruption and control-flow hijacking potential.\nA:H - Dereferencing freed `cifs_ses`/`cifs_tcon` state from the demultiplex kernel thread readily produces an oops or panic, and because the trigger is a repeatable unauthenticated network frame the attacker can crash the client at will."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T11:30:28.316Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/c868cabdf6fdd61bea54532271f4708254e57fc5"
},
{
"url": "https://git.kernel.org/stable/c/f92739fdd4522c4291277136399353d7c341fae4"
},
{
"url": "https://git.kernel.org/stable/c/a8344e2b69bde63f713b0aa796d70dbeadffddfb"
},
{
"url": "https://git.kernel.org/stable/c/705c76fbf726c7a2f6ff9143d4013b18daaaebf1"
}
],
"title": "smb: client: fix potential UAF in smb2_is_valid_lease_break()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-35864",
"datePublished": "2024-05-19T08:34:22.936Z",
"dateReserved": "2024-05-17T13:50:33.107Z",
"dateUpdated": "2026-08-05T11:30:28.316Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2024-35864",
"date": "2026-09-16",
"epss": "0.00662",
"percentile": "0.49966"
},
"fkie_nvd": {
"configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"6.1.85\", \"matchCriteriaId\": \"B62CF0EC-6C39-4DAD-A6CC-C31C3277A460\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.2\", \"versionEndExcluding\": \"6.6.26\", \"matchCriteriaId\": \"C520696A-A594-4FFC-A32D-12DA535CE911\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.7\", \"versionEndExcluding\": \"6.8.5\", \"matchCriteriaId\": \"DBD6C99E-4250-4DFE-8447-FF2075939D10\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*\", \"matchCriteriaId\": \"22BEDD49-2C6D-402D-9DBF-6646F6ECD10B\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*\", \"matchCriteriaId\": \"DF73CB2A-DFFD-46FB-9BFE-AA394F27EA37\"}]}]}]",
"descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb: client: fix potential UAF in smb2_is_valid_lease_break()\\n\\nSkip sessions that are being teared down (status == SES_EXITING) to\\navoid UAF.\"}, {\"lang\": \"es\", \"value\": \" En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: corrige UAF potencial en smb2_is_valid_lease_break() Omita las sesiones que se est\\u00e1n eliminando (estado == SES_EXITING) para evitar UAF.\"}]",
"id": "CVE-2024-35864",
"lastModified": "2024-12-30T14:58:03.057",
"metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 5.9}]}",
"published": "2024-05-19T09:15:07.957",
"references": "[{\"url\": \"https://git.kernel.org/stable/c/705c76fbf726c7a2f6ff9143d4013b18daaaebf1\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/a8344e2b69bde63f713b0aa796d70dbeadffddfb\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/c868cabdf6fdd61bea54532271f4708254e57fc5\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/f92739fdd4522c4291277136399353d7c341fae4\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/705c76fbf726c7a2f6ff9143d4013b18daaaebf1\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/a8344e2b69bde63f713b0aa796d70dbeadffddfb\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/c868cabdf6fdd61bea54532271f4708254e57fc5\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/f92739fdd4522c4291277136399353d7c341fae4\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}]",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}]"
},
"microsoft_vex": {
"current_release_date": "2026-08-07T01:13:22.000Z",
"cve": "CVE-2024-35864",
"id": "msrc_CVE-2024-35864",
"initial_release_date": "2025-09-03T21:55:56.000Z",
"product_status:known_affected": "4",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "smb: client: fix potential UAF in smb2_is_valid_lease_break()",
"url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2024-35864.json",
"version": "4"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2024-35864\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-19T09:15:07.957\",\"lastModified\":\"2026-08-04T11:18:02.117\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb: client: fix potential UAF in smb2_is_valid_lease_break()\\n\\nSkip sessions that are being teared down (status == SES_EXITING) to\\navoid UAF.\"},{\"lang\":\"es\",\"value\":\" En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: corrige UAF potencial en smb2_is_valid_lease_break() Omita las sesiones que se est\u00e1n eliminando (estado == SES_EXITING) para evitar UAF.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/smb/client/smb2misc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"7f48558e6489d032b1584b0cc9ac4bb11072c034\",\"lessThan\":\"c868cabdf6fdd61bea54532271f4708254e57fc5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7f48558e6489d032b1584b0cc9ac4bb11072c034\",\"lessThan\":\"f92739fdd4522c4291277136399353d7c341fae4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7f48558e6489d032b1584b0cc9ac4bb11072c034\",\"lessThan\":\"a8344e2b69bde63f713b0aa796d70dbeadffddfb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7f48558e6489d032b1584b0cc9ac4bb11072c034\",\"lessThan\":\"705c76fbf726c7a2f6ff9143d4013b18daaaebf1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a67172a013953664b1dad03c648200c70b90506c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3.12.48\",\"lessThan\":\"3.13\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/smb/client/smb2misc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.85\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.26\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.8.5\",\"lessThanOrEqual\":\"6.8.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.9\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-05-29T18:32:19.453857Z\",\"id\":\"CVE-2024-35864\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"6.1.85\",\"matchCriteriaId\":\"B62CF0EC-6C39-4DAD-A6CC-C31C3277A460\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.26\",\"matchCriteriaId\":\"C520696A-A594-4FFC-A32D-12DA535CE911\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.8.5\",\"matchCriteriaId\":\"DBD6C99E-4250-4DFE-8447-FF2075939D10\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"22BEDD49-2C6D-402D-9DBF-6646F6ECD10B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"DF73CB2A-DFFD-46FB-9BFE-AA394F27EA37\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/705c76fbf726c7a2f6ff9143d4013b18daaaebf1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a8344e2b69bde63f713b0aa796d70dbeadffddfb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c868cabdf6fdd61bea54532271f4708254e57fc5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f92739fdd4522c4291277136399353d7c341fae4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/705c76fbf726c7a2f6ff9143d4013b18daaaebf1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a8344e2b69bde63f713b0aa796d70dbeadffddfb\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c868cabdf6fdd61bea54532271f4708254e57fc5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f92739fdd4522c4291277136399353d7c341fae4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-08-04T22:46:52+00:00",
"cve": "CVE-2024-35864",
"id": "CVE-2024-35864",
"initial_release_date": "2024-05-19T00:00:00+00:00",
"product_status:fixed": "280",
"product_status:known_affected": "36",
"product_status:known_not_affected": "84",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: smb: client: fix potential UAF in smb2_is_valid_lease_break()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-35864.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-01T01:11:54Z",
"cve": "CVE-2024-35864",
"id": "CVE-2024-35864",
"initial_release_date": "2024-05-21T01:59:43Z",
"product_status:known_affected": "374",
"product_status:known_not_affected": "6",
"product_status:recommended": "1161",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2024-35864",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-35864.json",
"version": "116"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c868cabdf6fdd61bea54532271f4708254e57fc5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f92739fdd4522c4291277136399353d7c341fae4\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a8344e2b69bde63f713b0aa796d70dbeadffddfb\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/705c76fbf726c7a2f6ff9143d4013b18daaaebf1\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T03:21:48.471Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-35864\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-29T18:32:19.453857Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-29T18:32:23.849Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"smb: client: fix potential UAF in smb2_is_valid_lease_break()\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 9.8, \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:N - The vulnerable loop is entered only from `cifs_demultiplex_thread()` processing an unsolicited SMB2 lease-break frame received from the remote SMB server over TCP/445, which routinely traverses the internet (e.g. Azure Files and other cloud SMB shares). A malicious or compromised server, or an on-path attacker injecting into the stream, delivers the trigger entirely as network data.\\nAC:L - The attacker controls both sides of the race \\u2014 it forces session teardown (session-expired/user-session-deleted status codes, TCP reset driving reconnect, DFS IPC churn) and then floods lease-break notifications \\u2014 and it can stall the SMB2 LOGOFF reply so the session lingers in SES_EXITING on `smb_ses_list` for the entire request timeout, making the window arbitrarily wide and repeatable.\\nPR:N - Unsolicited oplock/lease-break frames bypass `smb2_verify_signature()` entirely and the handler ignores SessionId/TreeId, matching only on the attacker-supplied LeaseKey, so no credentials on the client and no authenticated SMB session are needed to reach the vulnerable traversal.\\nUI:N - In the realistic deployment \\u2014 a persistent cifs mount from fstab, autofs, or a container volume \\u2014 the connection already exists, and the compromised server or on-path injector triggers the code path with no action from any local user.\\nS:U - The use-after-free corrupts kernel heap memory belonging to the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\\nC:H - Walking a torn-down session\u0027s `tcon_list` and `pending_opens` dereferences freed slab objects whose contents the attacker can groom via heap spraying, turning `tcon-\u003ecfids`, `open-\u003etlink`, and `open-\u003elease_key` into attacker-influenced pointers that yield a kernel memory read primitive.\\nI:H - The path writes into the freed memory \\u2014 `spin_lock(\u0026tcon-\u003eopen_file_lock)`, `cifs_stats_inc()` counter increments, and `cifs_get_tlink()` refcount bumps \\u2014 and later frees/queues work (`queue_work(cifsiod_wq, \u0026cfid-\u003elease_break)`) through sprayed pointers, giving heap corruption and control-flow hijacking potential.\\nA:H - Dereferencing freed `cifs_ses`/`cifs_tcon` state from the demultiplex kernel thread readily produces an oops or panic, and because the trigger is a repeatable unauthenticated network frame the attacker can crash the client at will.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"7f48558e6489d032b1584b0cc9ac4bb11072c034\", \"lessThan\": \"c868cabdf6fdd61bea54532271f4708254e57fc5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7f48558e6489d032b1584b0cc9ac4bb11072c034\", \"lessThan\": \"f92739fdd4522c4291277136399353d7c341fae4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7f48558e6489d032b1584b0cc9ac4bb11072c034\", \"lessThan\": \"a8344e2b69bde63f713b0aa796d70dbeadffddfb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7f48558e6489d032b1584b0cc9ac4bb11072c034\", \"lessThan\": \"705c76fbf726c7a2f6ff9143d4013b18daaaebf1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a67172a013953664b1dad03c648200c70b90506c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3.12.48\", \"lessThan\": \"3.13\", \"versionType\": \"semver\"}], \"programFiles\": [\"fs/smb/client/smb2misc.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.13\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.13\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.85\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.26\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/smb/client/smb2misc.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c868cabdf6fdd61bea54532271f4708254e57fc5\"}, {\"url\": \"https://git.kernel.org/stable/c/f92739fdd4522c4291277136399353d7c341fae4\"}, {\"url\": \"https://git.kernel.org/stable/c/a8344e2b69bde63f713b0aa796d70dbeadffddfb\"}, {\"url\": \"https://git.kernel.org/stable/c/705c76fbf726c7a2f6ff9143d4013b18daaaebf1\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb: client: fix potential UAF in smb2_is_valid_lease_break()\\n\\nSkip sessions that are being teared down (status == SES_EXITING) to\\navoid UAF.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.85\", \"versionStartIncluding\": \"3.13\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.26\", \"versionStartIncluding\": \"3.13\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.5\", \"versionStartIncluding\": \"3.13\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"3.13\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.12.48\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:30:28.316Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2024-35864\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:30:28.316Z\", \"dateReserved\": \"2024-05-17T13:50:33.107Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-19T08:34:22.936Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
Loading…
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.
Loading…
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.
Loading…