CVE-2026-89673
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix XDR padding calculation in ff_encode_getdeviceinfo nfsd4_ff_encode_getdeviceinfo() computes the da_addr_body reservation as 16 + netid_len + addr_len, but the subsequent xdr_encode_opaque() calls emit 8 + round_up(netid_len, 4) + round_up(addr_len, 4) bytes. The mismatch means the declared da_addr_body length exceeds the actual encoded data by 2-8 bytes on every flexfile GETDEVICEINFO reply, leaking stale reply-page content to the client and mis-aligning the subsequent version list decode. Use xdr_align_size() for each string length to match what xdr_encode_opaque() actually writes.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-11 20:19:53.890000
Last modified
2026-10-24 15:17:35.240000
View original CVE JSON
{
"id": "CVE-2026-89673",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-11T20:19:53.890",
"lastModified": "2026-10-24T15:17:35.240",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix XDR padding calculation in ff_encode_getdeviceinfo\n\nnfsd4_ff_encode_getdeviceinfo() computes the da_addr_body reservation\nas 16 + netid_len + addr_len, but the subsequent xdr_encode_opaque()\ncalls emit 8 + round_up(netid_len, 4) + round_up(addr_len, 4) bytes.\nThe mismatch means the declared da_addr_body length exceeds the actual\nencoded data by 2-8 bytes on every flexfile GETDEVICEINFO reply,\nleaking stale reply-page content to the client and mis-aligning the\nsubsequent version list decode.\n\nUse xdr_align_size() for each string length to match what\nxdr_encode_opaque() actually writes."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"fs/nfsd/flexfilelayoutxdr.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "3f1a2b0b2d575f39ff0bedb5411822fe7446a805",
"lessThan": "356decf074b82bac5564568203c12426dcea3470",
"versionType": "git",
"status": "affected"
},
{
"version": "19a648a07572c70fbe16faf0fafaf3dce9fd998a",
"lessThan": "15460c8e6c9bc92cda8f68bc419ac082300ab3d6",
"versionType": "git",
"status": "affected"
},
{
"version": "6d08bd22fa2941a4d5ef45ed115dd00e484a93d7",
"lessThan": "9be67a6be48ddf2ebaa98c0df671690b8f9666e7",
"versionType": "git",
"status": "affected"
},
{
"version": "6372e2ee629894433fe6107d7048536a3280a284",
"lessThan": "88bce7e326c368d7df15126ccac537e54bebd467",
"versionType": "git",
"status": "affected"
},
{
"version": "6372e2ee629894433fe6107d7048536a3280a284",
"lessThan": "74015b7be806ad9e21d46f7bd2831df280c6c783",
"versionType": "git",
"status": "affected"
},
{
"version": "6372e2ee629894433fe6107d7048536a3280a284",
"lessThan": "41ebca28e17f84293650598f86bd69532ec1a8e0",
"versionType": "git",
"status": "affected"
},
{
"version": "6372e2ee629894433fe6107d7048536a3280a284",
"lessThan": "62e5949f0dd5ec837af144860ff908369df4c7c9",
"versionType": "git",
"status": "affected"
},
{
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"lessThan": "8b989aaec85e1293a871d602590c951fe44b8647",
"versionType": "git",
"status": "affected"
},
{
"version": "82e36f0c287769a0430268739a71dbd56df0e679",
"versionType": "git",
"status": "affected"
},
{
"version": "6370e66a71c4869247f8f406c2a8b2c43df8998f",
"versionType": "git",
"status": "affected"
},
{
"version": "16282aeca44bfac0d1ac3be6cd1a719d6ff3d749",
"versionType": "git",
"status": "affected"
},
{
"version": "efcae97fa425ca6db9d126e37daccf2d7225cb09",
"versionType": "git",
"status": "affected"
},
{
"version": "64c959d59c24c661bd5338e4e6f1f703d7c309a1",
"versionType": "git",
"status": "affected"
},
{
"version": "5.10.195",
"lessThan": "5.10.270",
"versionType": "semver",
"status": "affected"
},
{
"version": "5.15.132",
"lessThan": "5.15.221",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.1.53",
"lessThan": "6.1.188",
"versionType": "semver",
"status": "affected"
},
{
"version": "4.14.326",
"lessThan": "4.15",
"versionType": "semver",
"status": "affected"
},
{
"version": "4.19.295",
"lessThan": "4.20",
"versionType": "semver",
"status": "affected"
},
{
"version": "5.4.257",
"lessThan": "5.5",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.4.16",
"lessThan": "6.5",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.5.3",
"lessThan": "6.6",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"fs/nfsd/flexfilelayoutxdr.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.6",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.6",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.270",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.221",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.188",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.109",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.50",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.4",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/15460c8e6c9bc92cda8f68bc419ac082300ab3d6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/356decf074b82bac5564568203c12426dcea3470",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/41ebca28e17f84293650598f86bd69532ec1a8e0",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/62e5949f0dd5ec837af144860ff908369df4c7c9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/74015b7be806ad9e21d46f7bd2831df280c6c783",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/88bce7e326c368d7df15126ccac537e54bebd467",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8b989aaec85e1293a871d602590c951fe44b8647",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
"url": "https://git.kernel.org/stable/c/9be67a6be48ddf2ebaa98c0df671690b8f9666e7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}