{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-21807","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-12-29T08:45:45.772Z","datePublished":"2025-02-27T20:00:59.560Z","dateUpdated":"2026-05-11T21:06:54.851Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:06:54.851Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: fix queue freeze vs limits lock order in sysfs store methods\n\nqueue_attr_store() always freezes a device queue before calling the\nattribute store operation. For attributes that control queue limits, the\nstore operation will also lock the queue limits with a call to\nqueue_limits_start_update(). However, some drivers (e.g. SCSI sd) may\nneed to issue commands to a device to obtain limit values from the\nhardware with the queue limits locked. This creates a potential ABBA\ndeadlock situation if a user attempts to modify a limit (thus freezing\nthe device queue) while the device driver starts a revalidation of the\ndevice queue limits.\n\nAvoid such deadlock by not freezing the queue before calling the\n->store_limit() method in struct queue_sysfs_entry and instead use the\nqueue_limits_commit_update_frozen helper to freeze the queue after taking\nthe limits lock.\n\nThis also removes taking the sysfs lock for the store_limit method as\nit doesn't protect anything here, but creates even more nesting.\nHopefully it will go away from the actual sysfs methods entirely soon.\n\n(commit log adapted from a similar patch from  Damien Le Moal)"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-sysfs.c"],"versions":[{"version":"0327ca9d53bfbb0918867313049bba7046900f73","lessThan":"8985da5481562e96b95e94ed8e5cc9b6565eb82b","status":"affected","versionType":"git"},{"version":"0327ca9d53bfbb0918867313049bba7046900f73","lessThan":"c99f66e4084a62a2cc401c4704a84328aeddc9ec","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-sysfs.c"],"versions":[{"version":"6.9","status":"affected"},{"version":"0","lessThan":"6.9","status":"unaffected","versionType":"semver"},{"version":"6.13.2","lessThanOrEqual":"6.13.*","status":"unaffected","versionType":"semver"},{"version":"6.14","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.13.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.14"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/8985da5481562e96b95e94ed8e5cc9b6565eb82b"},{"url":"https://git.kernel.org/stable/c/c99f66e4084a62a2cc401c4704a84328aeddc9ec"}],"title":"block: fix queue freeze vs limits lock order in sysfs store methods","x_generator":{"engine":"bippy-1.2.0"}}}}