{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38691", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.032Z", "datePublished": "2025-09-04T15:32:45.301Z", "dateUpdated": "2026-07-14T12:42:20.615Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:33:07.377Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npNFS: Fix uninited ptr deref in block/scsi layout\n\nThe error occurs on the third attempt to encode extents. When function\next_tree_prepare_commit() reallocates a larger buffer to retry encoding\nextents, the \"layoutupdate_pages\" page array is initialized only after the\nretry loop. But ext_tree_free_commitdata() is called on every iteration\nand tries to put pages in the array, thus dereferencing uninitialized\npointers.\n\nAn additional problem is that there is no limit on the maximum possible\nbuffer_size. When there are too many extents, the client may create a\nlayoutcommit that is larger than the maximum possible RPC size accepted\nby the server.\n\nDuring testing, we observed two typical scenarios. First, one memory page\nfor extents is enough when we work with small files, append data to the\nend of the file, or preallocate extents before writing. But when we fill\na new large file without preallocating, the number of extents can be huge,\nand counting the number of written extents in ext_tree_encode_commit()\ndoes not help much. Since this number increases even more between\nunlocking and locking of ext_tree, the reallocated buffer may not be\nlarge enough again and again." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/nfs/blocklayout/extent_tree.c" ], "versions": [ { "version": "34dc93c2fc04da0d01acf8a1660b4ab276208af7", "lessThan": "579b85f893d9885162e1cabf99a4a088916e143e", "status": "affected", "versionType": "git" }, { "version": "34dc93c2fc04da0d01acf8a1660b4ab276208af7", "lessThan": "2896f101110076ac6bf99d7aaf463d61e26f89dd", "status": "affected", "versionType": "git" }, { "version": "34dc93c2fc04da0d01acf8a1660b4ab276208af7", "lessThan": "4f783333cbfa2ee7d4aa8e47f6bd1b3f77534fcf", "status": "affected", "versionType": "git" }, { "version": "34dc93c2fc04da0d01acf8a1660b4ab276208af7", "lessThan": "9be5c04beca3202d0a5f09fb4b2ecb644caa0bc5", "status": "affected", "versionType": "git" }, { "version": "34dc93c2fc04da0d01acf8a1660b4ab276208af7", "lessThan": "24334f3cf8a294f253071b5bf22d754dbb6d0f2d", "status": "affected", "versionType": "git" }, { "version": "34dc93c2fc04da0d01acf8a1660b4ab276208af7", "lessThan": "f0b2eee3fbba9b7e3746ef698424ef5e4a197776", "status": "affected", "versionType": "git" }, { "version": "34dc93c2fc04da0d01acf8a1660b4ab276208af7", "lessThan": "94ec6d939031a616474376dadbf4a8d0ef8b0bcc", "status": "affected", "versionType": "git" }, { "version": "34dc93c2fc04da0d01acf8a1660b4ab276208af7", "lessThan": "37c3443a2685528f972d910a6fb87716b96fef46", "status": "affected", "versionType": "git" }, { "version": "34dc93c2fc04da0d01acf8a1660b4ab276208af7", "lessThan": "9768797c219326699778fba9cd3b607b2f1e7950", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/nfs/blocklayout/extent_tree.c" ], "versions": [ { "version": "3.18", "status": "affected" }, { "version": "0", "lessThan": "3.18", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.297", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.241", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.190", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.149", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.103", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.43", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.11", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16.2", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17", "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": "3.18", "versionEndExcluding": "5.4.297" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "5.10.241" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "5.15.190" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.1.149" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.6.103" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.12.43" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.15.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.16.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/579b85f893d9885162e1cabf99a4a088916e143e" }, { "url": "https://git.kernel.org/stable/c/2896f101110076ac6bf99d7aaf463d61e26f89dd" }, { "url": "https://git.kernel.org/stable/c/4f783333cbfa2ee7d4aa8e47f6bd1b3f77534fcf" }, { "url": "https://git.kernel.org/stable/c/9be5c04beca3202d0a5f09fb4b2ecb644caa0bc5" }, { "url": "https://git.kernel.org/stable/c/24334f3cf8a294f253071b5bf22d754dbb6d0f2d" }, { "url": "https://git.kernel.org/stable/c/f0b2eee3fbba9b7e3746ef698424ef5e4a197776" }, { "url": "https://git.kernel.org/stable/c/94ec6d939031a616474376dadbf4a8d0ef8b0bcc" }, { "url": "https://git.kernel.org/stable/c/37c3443a2685528f972d910a6fb87716b96fef46" }, { "url": "https://git.kernel.org/stable/c/9768797c219326699778fba9cd3b607b2f1e7950" } ], "title": "pNFS: Fix uninited ptr deref in block/scsi layout", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:41:16.489Z" } }, { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-07-14T12:42:20.615Z" }, "affected": [ { "vendor": "Siemens", "product": "SIMATIC CN 4100", "versions": [ { "status": "affected", "version": "0", "lessThan": "V5.0", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "references": [ { "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html" }, { "url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html" } ] } ] } }