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vuln-cve/data/2026/52xxx/CVE-2026-52967.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-52967",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-06-09T07:44:35.374Z",
"datePublished": "2026-06-24T16:28:46.661Z",
"dateUpdated": "2026-10-19T19:47:10.711Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T12:32:11.748Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: fix possible infinite loop and oob read in symlink_data()\n\nOn 32-bit architectures, the infinite loop is as follows:\n\n len = p->ErrorDataLength == 0xfffffff8\n u8 *next = p->ErrorContextData + len\n next == p\n\nOn 32-bit architectures, the out-of-bounds read is as follows:\n\n len = p->ErrorDataLength == 0xfffffff0\n u8 *next = p->ErrorContextData + len\n next == (u8 *)p - 8"
}
],
"metrics": [
{
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"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
"baseScore": 8.1,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - The vulnerable SMB client parser consumes an SMB2 CREATE error response supplied by a remote SMB server over the network. A malicious or compromised SMB share can send the crafted `STATUS_STOPPED_ON_SYMLINK` response.\nAC:L - The server directly controls `ErrorContextCount`, `ByteCount`, `ErrorId`, and `ErrorDataLength`, and no race or hard-to-hit state is required. Although the wraparound behavior is 32-bit specific, that is a deployment property rather than an attacker-uncontrolled exploitation condition.\nPR:N - The attacker needs no privileges on the victim system; they only need to operate or control the SMB server endpoint that the client connects to. The path can also be reached through guest or null-auth SMB sessions.\nUI:R - The victim client must mount/connect to the SMB share and perform a path operation such as lookup, stat, open, or create that causes an SMB2 CREATE response to be parsed. The remote server cannot trigger this parser without client-side filesystem activity.\nS:U - The affected component is the Linux kernel SMB client, and the impact is to the same kernel/client security authority. This is not a VM escape, IOMMU bypass, or cross-scope sandbox escape.\nC:H - The bug is an out-of-bounds kernel read in a server-controlled response parser, and the read is not strictly bounded to only a few harmless bytes. Following the required conservative rule, this is scored as high confidentiality impact.\nI:N - The defect advances a parser pointer incorrectly and reads from the wrong location, but it does not write out of bounds or provide a kernel memory write primitive. No direct integrity impact beyond normal malicious-server control of SMB content was identified.\nA:H - The crafted length can make the parser loop indefinitely on 32-bit systems, causing a reliable denial of service. Other malformed pointer positions can also lead to invalid kernel reads and possible oops conditions."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"fs/smb/client/smb2file.c"
],
"versions": [
{
"version": "76894f3e2f71177747b8b4763fb180e800279585",
"lessThan": "1cfa2d59f669db28d6292d10ff87ca6837c781b0",
"status": "affected",
"versionType": "git"
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"lessThan": "b41598bf54b3fe528994e573df6008f8f4d0a4f4",
"status": "affected",
"versionType": "git"
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{
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"lessThan": "cd4b9b662f0fb9aa97ee6bf9034eca76fc6cab23",
"status": "affected",
"versionType": "git"
},
{
"version": "76894f3e2f71177747b8b4763fb180e800279585",
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"status": "affected",
"versionType": "git"
},
{
"version": "76894f3e2f71177747b8b4763fb180e800279585",
"lessThan": "1b9331b16b0ed9414dcf7583d8134bdfeb117aae",
"status": "affected",
"versionType": "git"
},
{
"version": "76894f3e2f71177747b8b4763fb180e800279585",
"lessThan": "7d9a7f1f96cd617ee9e75bb22217c709038e26b8",
"status": "affected",
"versionType": "git"
},
{
"version": "2d046892a493d9760c35fdaefc3017f27f91b621",
"status": "affected",
"versionType": "git"
},
{
"version": "6.0.16",
"lessThan": "6.1",
"status": "affected",
"versionType": "semver"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"fs/smb/client/smb2file.c"
],
"versions": [
{
"version": "6.1",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.1",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.175",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.141",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.91",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.33",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.0.10",
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.1",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.1",
"versionEndExcluding": "6.1.175"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.1",
"versionEndExcluding": "6.6.141"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.1",
"versionEndExcluding": "6.12.91"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.1",
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.1",
"versionEndExcluding": "7.0.10"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.1",
"versionEndExcluding": "7.1"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.0.16"
}
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}
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}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/1cfa2d59f669db28d6292d10ff87ca6837c781b0"
},
{
"url": "https://git.kernel.org/stable/c/b41598bf54b3fe528994e573df6008f8f4d0a4f4"
},
{
"url": "https://git.kernel.org/stable/c/cd4b9b662f0fb9aa97ee6bf9034eca76fc6cab23"
},
{
"url": "https://git.kernel.org/stable/c/97a05b0ae9ea5ec052be2eef0f9cc7ce03501bbb"
},
{
"url": "https://git.kernel.org/stable/c/1b9331b16b0ed9414dcf7583d8134bdfeb117aae"
},
{
"url": "https://git.kernel.org/stable/c/7d9a7f1f96cd617ee9e75bb22217c709038e26b8"
}
],
"title": "smb/client: fix possible infinite loop and oob read in symlink_data()",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2026-52967",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-10-16T15:23:38.471326Z"
}
}
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"type": "CWE",
"cweId": "CWE-190",
"description": "CWE-190 Integer Overflow or Wraparound"
}
]
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-19T19:47:10.711Z"
}
}
]
}
}
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