{"id":"CVE-2026-63800","revision":"f93dcdaa50064535848f4994b8475476","records":[{"revision":"f93dcdaa50064535848f4994b8475476","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63800","aliases":[],"title":"pNFS: Fix use-after-free in pnfs_update_layout()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npNFS: Fix use-after-free in pnfs_update_layout()\n\nWhen hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(),\nthe code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds,\npnfs_put_layout_hdr(lo) is called before trace_pnfs_update_layout(),\nwhich still references 'lo'. This results in a use-after-free when the\ntracepoint accesses lo's fields.\n\nFix this by moving the tracepoint call before pnfs_put_layout_hdr(lo).","state":0,"publishedAt":"2026-07-19T12:02:06.897+00:00","modifiedAt":"2026-10-19T20:07:47.475+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/nfs/pnfs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"06f58dbc49a23c99e5c0f246879ed16667f7bf8f\",\n                            \"lessThan\": \"4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2c8d5fc37fe2384a9bdb6965443ab9224d46f704\",\n                            \"lessThan\": \"1f24b8302c77dcaf79c64c073877a3b9f4dd25d2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2c8d5fc37fe2384a9bdb6965443ab9224d46f704\",\n                            \"lessThan\": \"9c0fb5c09ae5bd68dc0038692af8127029cb0385\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2c8d5fc37fe2384a9bdb6965443ab9224d46f704\",\n                            \"lessThan\": \"7e37e9b3e82ade881e1798e2f4fcc54aff7793c1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2c8d5fc37fe2384a9bdb6965443ab9224d46f704\",\n                            \"lessThan\": \"2883ddd7542b4437a2ab4908fe2773f690e20889\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2c8d5fc37fe2384a9bdb6965443ab9224d46f704\",\n                            \"lessThan\": \"200e7637f4d6a1342987045eea72641524f909dc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2c8d5fc37fe2384a9bdb6965443ab9224d46f704\",\n                            \"lessThan\": \"9645aaf689aff57427ece3b9fa47d5b5399417f4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2c8d5fc37fe2384a9bdb6965443ab9224d46f704\",\n                            \"lessThan\": \"13e198a90ca4050f4bee8a3f23680389a6563ccc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"aa2399f55eff4ec78330bb6fe55f9df53e5cae0c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.10.9\",\n                            \"lessThan\": \"5.10.260\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.91\",\n                            \"lessThan\": \"5.5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/nfs/pnfs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.11\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.260\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.211\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.177\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.144\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.95\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.38\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.3\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98","https://git.kernel.org/stable/c/1f24b8302c77dcaf79c64c073877a3b9f4dd25d2","https://git.kernel.org/stable/c/9c0fb5c09ae5bd68dc0038692af8127029cb0385","https://git.kernel.org/stable/c/7e37e9b3e82ade881e1798e2f4fcc54aff7793c1","https://git.kernel.org/stable/c/2883ddd7542b4437a2ab4908fe2773f690e20889","https://git.kernel.org/stable/c/200e7637f4d6a1342987045eea72641524f909dc","https://git.kernel.org/stable/c/9645aaf689aff57427ece3b9fa47d5b5399417f4","https://git.kernel.org/stable/c/13e198a90ca4050f4bee8a3f23680389a6563ccc"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63800","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63800","identifiers":["CVE-2026-63800"]},"retained":false,"historicalAffected":[]}],"coverage":[]}