{"id":"CVE-2025-40146","state":"PUBLISHED","title":"blk-mq: fix potential deadlock while nr_requests grown","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: fix potential deadlock while nr_requests grown\n\nAllocate and free sched_tags while queue is freezed can deadlock[1],\nthis is a long term problem, hence allocate memory before freezing\nqueue and free memory after queue is unfreezed.\n\n[1] https://lore.kernel.org/all/0659ea8d-a463-47c8-9180-43c719e106eb@linux.ibm.com/","publishedAt":"2025-11-12T10:23:26.287Z","updatedAt":"2026-05-11T21:43:37.672Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e3a2b3f931f59d5284abd13faf8bded726884ffd","status":"affected","lessThan":"8d26acf8477174d8ef690eb6affe13a630f586ae","versionType":"git"},{"version":"e3a2b3f931f59d5284abd13faf8bded726884ffd","status":"affected","lessThan":"b86433721f46d934940528f28d49c1dedb690df1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-mq.c","block/blk-mq.h","block/blk-sysfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.16","versionType":"semver"},{"version":"6.17.3","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-mq.c","block/blk-mq.h","block/blk-sysfs.c"]}],"references":["https://git.kernel.org/stable/c/8d26acf8477174d8ef690eb6affe13a630f586ae","https://git.kernel.org/stable/c/b86433721f46d934940528f28d49c1dedb690df1"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40146.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40146","state":"PUBLISHED","datePublished":"2025-11-12T10:23:26.287Z","dateUpdated":"2026-05-11T21:43:37.672Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.175Z"},"containers":{"cna":{"title":"blk-mq: fix potential deadlock while nr_requests grown","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: fix potential deadlock while nr_requests grown\n\nAllocate and free sched_tags while queue is freezed can deadlock[1],\nthis is a long term problem, hence allocate memory before freezing\nqueue and free memory after queue is unfreezed.\n\n[1] https://lore.kernel.org/all/0659ea8d-a463-47c8-9180-43c719e106eb@linux.ibm.com/"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e3a2b3f931f59d5284abd13faf8bded726884ffd","status":"affected","lessThan":"8d26acf8477174d8ef690eb6affe13a630f586ae","versionType":"git"},{"version":"e3a2b3f931f59d5284abd13faf8bded726884ffd","status":"affected","lessThan":"b86433721f46d934940528f28d49c1dedb690df1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-mq.c","block/blk-mq.h","block/blk-sysfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.16","versionType":"semver"},{"version":"6.17.3","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-mq.c","block/blk-mq.h","block/blk-sysfs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/8d26acf8477174d8ef690eb6affe13a630f586ae"},{"url":"https://git.kernel.org/stable/c/b86433721f46d934940528f28d49c1dedb690df1"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:43:37.672Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.17.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}