Unrated
nfsd: fix XDR padding calculation in ff_encode_getdeviceinfo
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.
Announced Source revision 1
Original source ↗CVE-2026-89673
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89673
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"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",
"version": "6372e2ee629894433fe6107d7048536a3280a284",
"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"
}
],
"programFiles": [
"fs/nfsd/flexfilelayoutxdr.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/nfsd/flexfilelayoutxdr.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89673
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #55581 · Revision 1
- Added to Heist Feed
- Publisher date