{"id":"CVE-2026-64057","revision":null,"records":[{"revision":"409ccf4ab43f4626827e15cdf32ea4b3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64057","aliases":[],"title":"afs: Fix the locking used by afs_get_link()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Fix the locking used by afs_get_link()\n\nThe afs filesystem in the kernel doesn't do locking correctly for symbolic\nlinks.  There are a number of problems:\n\n (1) It doesn't do any locking around afs_read_single() to prevent races\n     between multiple ->get_link() calls, thereby allowing the possibility\n     of leaks.\n\n (2) It doesn't use RCU barriering when accessing the buffer pointers\n     during RCU pathwalk.\n\n (3) It can race with another thread updating the contents of the symlink\n     if a third party updated it on the server.\n\nFix this by the following means:\n\n (0) Move symlink handling into its own file as this makes it more\n     complicated.\n\n (1) Take the validate_lock around afs_read_single() to prevent races\n     between multiple ->get_link() calls.\n\n (2) Keep a separate copy of the symlink contents with an rcu_head.  This\n     is always going to be a lot smaller than a page, so it can be\n     kmalloc'd and save quite a bit of memory.  It also needs a refcount\n     for non-RCU pathwalk.\n\n (3) Split the symlink read and write-to-cache routines in afs from those\n     for directories.\n\n (4) Discard the I/O buffer as soon as the write-to-cache completes as this\n     is a full page (plus a folio_queue).\n\n (5) If there's no cache, discard the I/O buffer immediately after reading\n     and copying if there is no cache.","state":0,"publishedAt":"2026-07-19T15:39:38.321+00:00","modifiedAt":"2026-10-15T10:07:59.282+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/afs/Makefile\",\n                        \"fs/afs/dir.c\",\n                        \"fs/afs/fsclient.c\",\n                        \"fs/afs/inode.c\",\n                        \"fs/afs/internal.h\",\n                        \"fs/afs/symlink.c\",\n                        \"fs/afs/validation.c\",\n                        \"fs/afs/yfsclient.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"eae9e78951bb02a7b94a9adef6e981413d13c564\",\n                            \"lessThan\": \"93531bca46707c6c28c4f4eb26c101fa36ccb8cb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"eae9e78951bb02a7b94a9adef6e981413d13c564\",\n                            \"lessThan\": \"77ea917cbed62882a33114b1e23ededb977e4287\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"eae9e78951bb02a7b94a9adef6e981413d13c564\",\n                            \"lessThan\": \"c0410adf3da6db46f3513411fcf95e63c2f1d1ad\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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/afs/Makefile\",\n                        \"fs/afs/dir.c\",\n                        \"fs/afs/fsclient.c\",\n                        \"fs/afs/inode.c\",\n                        \"fs/afs/internal.h\",\n                        \"fs/afs/symlink.c\",\n                        \"fs/afs/validation.c\",\n                        \"fs/afs/yfsclient.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.14\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.11\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/93531bca46707c6c28c4f4eb26c101fa36ccb8cb","https://git.kernel.org/stable/c/77ea917cbed62882a33114b1e23ededb977e4287","https://git.kernel.org/stable/c/c0410adf3da6db46f3513411fcf95e63c2f1d1ad"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64057","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64057","identifiers":["CVE-2026-64057"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T17:05:03.6461191+00:00","complete":true,"records":1772,"lastAttemptAt":"2026-11-09T17:05:03.6461191+00:00","lastSuccessAt":"2026-11-09T17:05:03.8531145+00:00","error":null,"lastVerifiedAt":"2026-11-09T17:05:03.853115+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-c9cdfc1581e828ba6edad094382347f5c5591d8ad29e4b235259cf3365c4cd4f","complete":true,"records":421470,"lastAttemptAt":"2026-11-09T17:02:16.1896721+00:00","lastSuccessAt":"2026-11-09T17:02:15.8609908+00:00","error":null,"lastVerifiedAt":"2026-11-09T17:02:16.1896721+00:00","snapshotPublishedAt":"2026-11-09T16:22:58+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-473bda92d9f145e4a59d46ab39e596a4","complete":false,"records":13655,"lastAttemptAt":"2026-11-09T17:15:31.9295462+00:00","lastSuccessAt":"2026-11-09T17:15:31.925+00:00","error":"8 identifier lookups failed; latest failures include HTTP 403. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-09T17:15:31.925+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13381,"expectedIdentifiers":13707,"failedIdentifiers":8},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-09T17:05:03.6461191+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T17:05:03.6461191+00:00","lastSuccessAt":"2026-11-09T17:05:03.8539711+00:00","error":null,"lastVerifiedAt":"2026-11-09T17:05:03.8539712+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-27d7fc34e294426a8947cddc275fdd88","complete":true,"records":13667,"lastAttemptAt":"2026-11-09T17:05:13.4623818+00:00","lastSuccessAt":"2026-11-09T17:05:13.459+00:00","error":null,"lastVerifiedAt":"2026-11-09T17:05:13.459+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13707,"expectedIdentifiers":13707,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-09T17:04:56.7195673+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-09T17:04:56.7195673+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-09T17:02:16.3773977+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-09T17:02:16.3773977+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-761ecc9061239b0da572dc9254c6f384c1d19339eb08408c436647a2f26129e9","complete":true,"records":3064,"lastAttemptAt":"2026-11-09T17:05:03.6013858+00:00","lastSuccessAt":"2026-11-09T17:05:03.4044794+00:00","error":null,"lastVerifiedAt":"2026-11-09T17:05:03.6013858+00:00","snapshotPublishedAt":"2026-11-09T16:33:20+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-f8ac1981a68d9f0cc4ed8b05de89035ef9b503c12568a353caa684b6b64f832a","complete":true,"records":231305,"lastAttemptAt":"2026-11-09T17:04:55.1051927+00:00","lastSuccessAt":"2026-11-09T17:04:53.3741561+00:00","error":null,"lastVerifiedAt":"2026-11-09T17:04:55.1051927+00:00","snapshotPublishedAt":"2026-11-09T16:33:28+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}