{"id":"CVE-2026-72437","state":"PUBLISHED","title":"md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry\n\nWhen a read is retried, raid1_read_request() may be called with a\npre-allocated r1_bio. If wait_read_barrier() fails for a REQ_NOWAIT\nread, the bio is completed and the function returns immediately. In this\ncase the existing r1_bio is leaked.\n\nThis fixes a leak of pre-allocated r1_bio structures for retried reads.","publishedAt":"2026-08-15T05:56:50.732Z","updatedAt":"2026-08-17T05:14:37.742Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5aa705039c4fca84575539bfa2b8a28454a3d2ca","status":"affected","lessThan":"d1eda529a4bf6b866d02755723ee0eb1f037a5ed","versionType":"git"},{"version":"5aa705039c4fca84575539bfa2b8a28454a3d2ca","status":"affected","lessThan":"c66ed3e6371f5dba8f5d8ab810d6683ddc99201e","versionType":"git"},{"version":"5aa705039c4fca84575539bfa2b8a28454a3d2ca","status":"affected","lessThan":"db58075bc9c2ad2731f9c063859b47104bc2e7ef","versionType":"git"},{"version":"5aa705039c4fca84575539bfa2b8a28454a3d2ca","status":"affected","lessThan":"6d92dbd73d19a0622f60352ce9d9379f7a760112","versionType":"git"},{"version":"5aa705039c4fca84575539bfa2b8a28454a3d2ca","status":"affected","lessThan":"c6e6354295845698d2fdfa20b71fc404786f7e93","versionType":"git"},{"version":"5aa705039c4fca84575539bfa2b8a28454a3d2ca","status":"affected","lessThan":"69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/raid1.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/raid1.c"]}],"references":["https://git.kernel.org/stable/c/d1eda529a4bf6b866d02755723ee0eb1f037a5ed","https://git.kernel.org/stable/c/c66ed3e6371f5dba8f5d8ab810d6683ddc99201e","https://git.kernel.org/stable/c/db58075bc9c2ad2731f9c063859b47104bc2e7ef","https://git.kernel.org/stable/c/6d92dbd73d19a0622f60352ce9d9379f7a760112","https://git.kernel.org/stable/c/c6e6354295845698d2fdfa20b71fc404786f7e93","https://git.kernel.org/stable/c/69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72437.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72437","state":"PUBLISHED","datePublished":"2026-08-15T05:56:50.732Z","dateUpdated":"2026-08-17T05:14:37.742Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.929Z"},"containers":{"cna":{"title":"md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry\n\nWhen a read is retried, raid1_read_request() may be called with a\npre-allocated r1_bio. If wait_read_barrier() fails for a REQ_NOWAIT\nread, the bio is completed and the function returns immediately. In this\ncase the existing r1_bio is leaked.\n\nThis fixes a leak of pre-allocated r1_bio structures for retried reads."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5aa705039c4fca84575539bfa2b8a28454a3d2ca","status":"affected","lessThan":"d1eda529a4bf6b866d02755723ee0eb1f037a5ed","versionType":"git"},{"version":"5aa705039c4fca84575539bfa2b8a28454a3d2ca","status":"affected","lessThan":"c66ed3e6371f5dba8f5d8ab810d6683ddc99201e","versionType":"git"},{"version":"5aa705039c4fca84575539bfa2b8a28454a3d2ca","status":"affected","lessThan":"db58075bc9c2ad2731f9c063859b47104bc2e7ef","versionType":"git"},{"version":"5aa705039c4fca84575539bfa2b8a28454a3d2ca","status":"affected","lessThan":"6d92dbd73d19a0622f60352ce9d9379f7a760112","versionType":"git"},{"version":"5aa705039c4fca84575539bfa2b8a28454a3d2ca","status":"affected","lessThan":"c6e6354295845698d2fdfa20b71fc404786f7e93","versionType":"git"},{"version":"5aa705039c4fca84575539bfa2b8a28454a3d2ca","status":"affected","lessThan":"69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/raid1.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/raid1.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d1eda529a4bf6b866d02755723ee0eb1f037a5ed"},{"url":"https://git.kernel.org/stable/c/c66ed3e6371f5dba8f5d8ab810d6683ddc99201e"},{"url":"https://git.kernel.org/stable/c/db58075bc9c2ad2731f9c063859b47104bc2e7ef"},{"url":"https://git.kernel.org/stable/c/6d92dbd73d19a0622f60352ce9d9379f7a760112"},{"url":"https://git.kernel.org/stable/c/c6e6354295845698d2fdfa20b71fc404786f7e93"},{"url":"https://git.kernel.org/stable/c/69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:14:37.742Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}