CVE-2025-68349 (GCVE-0-2025-68349)
Vulnerability from cvelistv5
Published
2025-12-24 10:32
Modified
2026-08-05 12:10
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid Fixes a crash when layout is null during this call stack: write_inode -> nfs4_write_inode -> pnfs_layoutcommit_inode pnfs_set_layoutcommit relies on the lseg refcount to keep the layout around. Need to clear NFS_INO_LAYOUTCOMMIT otherwise we might attempt to reference a null layout.
References
Impacted products
Vendor Product Version
Linux Linux Version: fe1cf9469d7bcb6af27e42eb555a41b0135bce4a
Version: fe1cf9469d7bcb6af27e42eb555a41b0135bce4a
Version: fe1cf9469d7bcb6af27e42eb555a41b0135bce4a
Version: fe1cf9469d7bcb6af27e42eb555a41b0135bce4a
Version: fe1cf9469d7bcb6af27e42eb555a41b0135bce4a
Version: fe1cf9469d7bcb6af27e42eb555a41b0135bce4a
Version: fe1cf9469d7bcb6af27e42eb555a41b0135bce4a
Version: fe1cf9469d7bcb6af27e42eb555a41b0135bce4a
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a malicious or compromised pNFS server can return layout-state errors that lead to the client crash.\\nAC:L - The server controls layout ranges, data-server replies, and stateid-error timing, allowing it to establish a pending layoutcommit and then invalidate the last layout segment without relying on an uncontrollable race.\\nPR:N - The attacker needs no account or capability on the client; CAP_SYS_ADMIN is required only for the victim\u0027s initial NFS mount, and ordinary deployments may use unauthenticated AUTH_SYS server communication.\\nUI:N - In a pre-mounted pNFS or NFS-root deployment, automated writes and kernel writeback can complete the trigger sequence without human action at exploitation time.\\nS:U - The resulting failure affects the NFS client kernel within its existing security authority and does not cross a virtualization, sandbox, or IOMMU boundary.\\nC:N - The stale flag causes a direct NULL dereference of the absent layout rather than an out-of-bounds read, use-after-free access, or information-disclosure primitive.\\nI:N - The defect does not provide an attacker-controlled write or corrupt adjacent memory; execution faults while attempting to traverse the layout segment list through a NULL layout pointer.\\nA:H - The NULL dereference occurs in kernel writeback and can produce an oops or panic, taking the client system or critical kernel functionality out of service.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"fe1cf9469d7bcb6af27e42eb555a41b0135bce4a\", \"lessThan\": \"084bebe82ad86f718a3af84f34761863e63164ed\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fe1cf9469d7bcb6af27e42eb555a41b0135bce4a\", \"lessThan\": \"b6e4e3a08c03200cc4b8067ec8ab3172a989d6fc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fe1cf9469d7bcb6af27e42eb555a41b0135bce4a\", \"lessThan\": \"104080582ae0aa6dce6c6d75ff89062efe84673b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fe1cf9469d7bcb6af27e42eb555a41b0135bce4a\", \"lessThan\": \"f718f9ea6094843b8c059b073af49ad61e9f49bb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fe1cf9469d7bcb6af27e42eb555a41b0135bce4a\", \"lessThan\": \"59947dff0fb7c19c09ce6dccbcd253fd542b6c25\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fe1cf9469d7bcb6af27e42eb555a41b0135bce4a\", \"lessThan\": \"ca2e7fdad7c683b64821c94a58b9b68733214dad\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fe1cf9469d7bcb6af27e42eb555a41b0135bce4a\", \"lessThan\": \"38694f9aae00459ab443a7dc8b3949a6b33b560a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fe1cf9469d7bcb6af27e42eb555a41b0135bce4a\", \"lessThan\": \"e0f8058f2cb56de0b7572f51cd563ca5debce746\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/nfs/pnfs.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.248\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.198\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.160\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.120\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.63\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.17.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.17.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"6.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/nfs/pnfs.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/084bebe82ad86f718a3af84f34761863e63164ed\"}, {\"url\": \"https://git.kernel.org/stable/c/b6e4e3a08c03200cc4b8067ec8ab3172a989d6fc\"}, {\"url\": \"https://git.kernel.org/stable/c/104080582ae0aa6dce6c6d75ff89062efe84673b\"}, {\"url\": \"https://git.kernel.org/stable/c/f718f9ea6094843b8c059b073af49ad61e9f49bb\"}, {\"url\": \"https://git.kernel.org/stable/c/59947dff0fb7c19c09ce6dccbcd253fd542b6c25\"}, {\"url\": \"https://git.kernel.org/stable/c/ca2e7fdad7c683b64821c94a58b9b68733214dad\"}, {\"url\": \"https://git.kernel.org/stable/c/38694f9aae00459ab443a7dc8b3949a6b33b560a\"}, {\"url\": \"https://git.kernel.org/stable/c/e0f8058f2cb56de0b7572f51cd563ca5debce746\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nNFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid\\n\\nFixes a crash when layout is null during this call stack:\\n\\nwrite_inode\\n    -\u003e nfs4_write_inode\\n        -\u003e pnfs_layoutcommit_inode\\n\\npnfs_set_layoutcommit relies on the lseg refcount to keep the layout\\naround. Need to clear NFS_INO_LAYOUTCOMMIT otherwise we might attempt\\nto reference a null layout.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.248\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.198\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.160\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.120\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.63\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.17.13\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.2\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19\", \"versionStartIncluding\": \"4.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:10:59.666Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-68349\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T12:10:59.666Z\", \"dateReserved\": \"2025-12-16T14:48:05.300Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-12-24T10:32:41.253Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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