{"id":"CVE-2026-99136","aliases":[],"title":"dm-crypt: fix a tiny race condition in crypt_dec_pending","titleSource":"Linux","descriptionSource":"Linux","products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"b35f8caa0890169000fec22902290d9a15274cbd","status":"affected","lessThan":"ac5d887ab93592fc5e3605fe30c1d8d232d609b3","versionType":"git"},{"version":"b35f8caa0890169000fec22902290d9a15274cbd","status":"affected","lessThan":"4f16bb982b27b9f5a15301f622c318001fe521f8","versionType":"git"},{"version":"b35f8caa0890169000fec22902290d9a15274cbd","status":"affected","lessThan":"148845aa1921d95ef5dc851c76e6a284f6657df6","versionType":"git"},{"version":"9c8f3fcd3ffd3283cc0971c8919058356f20a963","status":"affected","versionType":"git"},{"version":"2.6.28.9","status":"affected","lessThan":"2.6.29","versionType":"semver"}],"defaultStatus":"unaffected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99136"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"2.6.29","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.29","versionType":"semver"},{"version":"6.18.59","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.13","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99136"}],"remediation":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-crypt: fix a tiny race condition in crypt_dec_pending\n\ncrypt_dec_pending reads io->error before calling atomic_dec_and_test.\nAnother context, for example crypt_endio called from an interrupt, may\nset io->error and drop its reference between the read and the\ndecrement. crypt_dec_pending then drops the last reference and completes\nthe bio with the stale status - so a read that failed and was never\ndecrypted, or a write that failed, is reported as successful.\n\nThe read was placed before the decrement by commit b35f8caa0890 (\"dm\ncrypt: wait for endio to complete before destruction\"), because that\ncommit freed dm_crypt_io before calling bio_endio. This is no longer the\ncase, dm_crypt_io lives in the per-bio data now.\n\nRead io->error after atomic_dec_and_test instead. atomic_dec_and_test is\nfully ordered, so no additional barrier is needed.","severity":"unknown","score":null,"published":"2026-10-28T10:34:48.558Z","modified":"2026-10-28T10:34:48.558Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://git.kernel.org/stable/c/ac5d887ab93592fc5e3605fe30c1d8d232d609b3","https://git.kernel.org/stable/c/4f16bb982b27b9f5a15301f622c318001fe521f8","https://git.kernel.org/stable/c/148845aa1921d95ef5dc851c76e6a284f6657df6"],"sources":[{"name":"CVE","id":"CVE-2026-99136","modified":"2026-10-28T10:34:48.558Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99136"}],"assessments":[],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T21:35:36.012Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}