CVE-2026-89673

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89673", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.746Z", "datePublished": "2026-09-11T19:45:58.149Z", "dateUpdated": "2026-10-24T14:15:11.211Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-24T14:15:11.211Z"}, "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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/flexfilelayoutxdr.c"], "versions": [{"version": "3f1a2b0b2d575f39ff0bedb5411822fe7446a805", "lessThan": "356decf074b82bac5564568203c12426dcea3470", "status": "affected", "versionType": "git"}, {"version": "19a648a07572c70fbe16faf0fafaf3dce9fd998a", "lessThan": "15460c8e6c9bc92cda8f68bc419ac082300ab3d6", "status": "affected", "versionType": "git"}, {"version": "6d08bd22fa2941a4d5ef45ed115dd00e484a93d7", "lessThan": "9be67a6be48ddf2ebaa98c0df671690b8f9666e7", "status": "affected", "versionType": "git"}, {"version": "6372e2ee629894433fe6107d7048536a3280a284", "lessThan": "88bce7e326c368d7df15126ccac537e54bebd467", "status": "affected", "versionType": "git"}, {"version": "6372e2ee629894433fe6107d7048536a3280a284", "lessThan": "74015b7be806ad9e21d46f7bd2831df280c6c783", "status": "affected", "versionType": "git"}, {"version": "6372e2ee629894433fe6107d7048536a3280a284", "lessThan": "41ebca28e17f84293650598f86bd69532ec1a8e0", "status": "affected", "versionType": "git"}, {"version": "6372e2ee629894433fe6107d7048536a3280a284", "lessThan": "62e5949f0dd5ec837af144860ff908369df4c7c9", "status": "affected", "versionType": "git"}, {"version": "6372e2ee629894433fe6107d7048536a3280a284", "lessThan": "8b989aaec85e1293a871d602590c951fe44b8647", "status": "affected", "versionType": "git"}, {"version": "82e36f0c287769a0430268739a71dbd56df0e679", "status": "affected", "versionType": "git"}, {"version": "6370e66a71c4869247f8f406c2a8b2c43df8998f", "status": "affected", "versionType": "git"}, {"version": "16282aeca44bfac0d1ac3be6cd1a719d6ff3d749", "status": "affected", "versionType": "git"}, {"version": "efcae97fa425ca6db9d126e37daccf2d7225cb09", "status": "affected", "versionType": "git"}, {"version": "64c959d59c24c661bd5338e4e6f1f703d7c309a1", "status": "affected", "versionType": "git"}, {"version": "5.10.195", "lessThan": "5.10.270", "status": "affected", "versionType": "semver"}, {"version": "5.15.132", "lessThan": "5.15.221", "status": "affected", "versionType": "semver"}, {"version": "6.1.53", "lessThan": "6.1.188", "status": "affected", "versionType": "semver"}, {"version": "4.14.326", "lessThan": "4.15", "status": "affected", "versionType": "semver"}, {"version": "4.19.295", "lessThan": "4.20", "status": "affected", "versionType": "semver"}, {"version": "5.4.257", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "6.4.16", "lessThan": "6.5", "status": "affected", "versionType": "semver"}, {"version": "6.5.3", "lessThan": "6.6", "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/nfsd/flexfilelayoutxdr.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "5.10.195", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.132", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.53", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.326"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.295"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.257"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/356decf074b82bac5564568203c12426dcea3470"}, {"url": "https://git.kernel.org/stable/c/15460c8e6c9bc92cda8f68bc419ac082300ab3d6"}, {"url": "https://git.kernel.org/stable/c/9be67a6be48ddf2ebaa98c0df671690b8f9666e7"}, {"url": "https://git.kernel.org/stable/c/88bce7e326c368d7df15126ccac537e54bebd467"}, {"url": "https://git.kernel.org/stable/c/74015b7be806ad9e21d46f7bd2831df280c6c783"}, {"url": "https://git.kernel.org/stable/c/41ebca28e17f84293650598f86bd69532ec1a8e0"}, {"url": "https://git.kernel.org/stable/c/62e5949f0dd5ec837af144860ff908369df4c7c9"}, {"url": "https://git.kernel.org/stable/c/8b989aaec85e1293a871d602590c951fe44b8647"}], "title": "nfsd: fix XDR padding calculation in ff_encode_getdeviceinfo", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/nfsd/flexfilelayoutxdr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "356decf074b82bac5564568203c12426dcea3470", "status": "affected", "version": "3f1a2b0b2d575f39ff0bedb5411822fe7446a805", "versionType": "git"}, {"lessThan": "15460c8e6c9bc92cda8f68bc419ac082300ab3d6", "status": "affected", "version": "19a648a07572c70fbe16faf0fafaf3dce9fd998a", "versionType": "git"}, {"lessThan": "9be67a6be48ddf2ebaa98c0df671690b8f9666e7", "status": "affected", "version": "6d08bd22fa2941a4d5ef45ed115dd00e484a93d7", "versionType": "git"}, {"lessThan": "88bce7e326c368d7df15126ccac537e54bebd467", "status": "affected", "version": "6372e2ee629894433fe6107d7048536a3280a284", "versionType": "git"}, {"lessThan": "74015b7be806ad9e21d46f7bd2831df280c6c783", "status": "affected", "version": "6372e2ee629894433fe6107d7048536a3280a284", "versionType": "git"}, {"lessThan": "41ebca28e17f84293650598f86bd69532ec1a8e0", "status": "affected", "version": "6372e2ee629894433fe6107d7048536a3280a284", "versionType": "git"}, {"lessThan": "62e5949f0dd5ec837af144860ff908369df4c7c9", "status": "affected", "version": "6372e2ee629894433fe6107d7048536a3280a284", "versionType": "git"}, {"lessThan": "8b989aaec85e1293a871d602590c951fe44b8647", "status": "affected", "version": "6372e2ee629894433fe6107d7048536a3280a284", "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"}, {"lessThan": "5.10.270", "status": "affected", "version": "5.10.195", "versionType": "semver"}, {"lessThan": "5.15.221", "status": "affected", "version": "5.15.132", "versionType": "semver"}, {"lessThan": "6.1.188", "status": "affected", "version": "6.1.53", "versionType": "semver"}, {"lessThan": "4.15", "status": "affected", "version": "4.14.326", "versionType": "semver"}, {"lessThan": "4.20", "status": "affected", "version": "4.19.295", "versionType": "semver"}, {"lessThan": "5.5", "status": "affected", "version": "5.4.257", "versionType": "semver"}, {"lessThan": "6.5", "status": "affected", "version": "6.4.16", "versionType": "semver"}, {"lessThan": "6.6", "status": "affected", "version": "6.5.3", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/nfsd/flexfilelayoutxdr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.6"}, {"lessThan": "6.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "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."}], "id": "CVE-2026-89673", "lastModified": "2026-10-24T15:17:35.240", "metrics": {}, "published": "2026-09-11T20:19:53.890", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "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", "url": "https://git.kernel.org/stable/c/9be67a6be48ddf2ebaa98c0df671690b8f9666e7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux Kernel (nfsd): Information disclosure due to XDR padding calculation error", "id": "2532322", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532322"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's NFS daemon (nfsd). A remote attacker could exploit an error in the XDR (External Data Representation) padding calculation within the `ff_encode_getdeviceinfo` function. This mismatch between reserved and actual data size leads to the leakage of stale reply-page content to the client, potentially disclosing sensitive information. It also causes misalignment in subsequent data decoding."], "name": "CVE-2026-89673", "public_date": "2026-09-11T19:45:58Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89673\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89673\nhttps://git.kernel.org/stable/c/41ebca28e17f84293650598f86bd69532ec1a8e0\nhttps://git.kernel.org/stable/c/62e5949f0dd5ec837af144860ff908369df4c7c9\nhttps://git.kernel.org/stable/c/74015b7be806ad9e21d46f7bd2831df280c6c783\nhttps://git.kernel.org/stable/c/8b989aaec85e1293a871d602590c951fe44b8647"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[efcae97fa425ca6db9d126e37daccf2d7225cb09,74015b7be806ad9e21d46f7bd2831df280c6c783)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[efcae97fa425ca6db9d126e37daccf2d7225cb09,41ebca28e17f84293650598f86bd69532ec1a8e0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[efcae97fa425ca6db9d126e37daccf2d7225cb09,62e5949f0dd5ec837af144860ff908369df4c7c9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[efcae97fa425ca6db9d126e37daccf2d7225cb09,8b989aaec85e1293a871d602590c951fe44b8647)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.4.16,6.12.109)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.4.16,6.18.50)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.4.16,7.2.4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.4.16,7.3-rc1)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T06:15:04.246235+00:00", "updated": "2026-09-15T20:30:10.346072+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}