{"id":"CVE-2022-49406","state":"PUBLISHED","title":"block: Fix potential deadlock in blk_ia_range_sysfs_show()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: Fix potential deadlock in blk_ia_range_sysfs_show()\n\nWhen being read, a sysfs attribute is already protected against removal\nwith the kobject node active reference counter. As a result, in\nblk_ia_range_sysfs_show(), there is no need to take the queue sysfs\nlock when reading the value of a range attribute. Using the queue sysfs\nlock in this function creates a potential deadlock situation with the\ndisk removal, something that a lockdep signals with a splat when the\ndevice is removed:\n\n[  760.703551]  Possible unsafe locking scenario:\n[  760.703551]\n[  760.703554]        CPU0                    CPU1\n[  760.703556]        ----                    ----\n[  760.703558]   lock(&q->sysfs_lock);\n[  760.703565]                                lock(kn->active#385);\n[  760.703573]                                lock(&q->sysfs_lock);\n[  760.703579]   lock(kn->active#385);\n[  760.703587]\n[  760.703587]  *** DEADLOCK ***\n\nSolve this by removing the mutex_lock()/mutex_unlock() calls from\nblk_ia_range_sysfs_show().","publishedAt":"2025-02-26T02:12:31.086Z","updatedAt":"2026-05-11T18:59:08.671Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a2247f19ee1c5ad75ef095cdfb909a3244b88aa8","status":"affected","lessThan":"dc107c805cde709866b59867ef72b9390199205e","versionType":"git"},{"version":"a2247f19ee1c5ad75ef095cdfb909a3244b88aa8","status":"affected","lessThan":"717b078bc745ba9a262abebed9806a17e8bbb77b","versionType":"git"},{"version":"a2247f19ee1c5ad75ef095cdfb909a3244b88aa8","status":"affected","lessThan":"41e46b3c2aa24f755b2ae9ec4ce931ba5f0d8532","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-ia-ranges.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.16","versionType":"semver"},{"version":"5.17.14","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.3","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-ia-ranges.c"]}],"references":["https://git.kernel.org/stable/c/dc107c805cde709866b59867ef72b9390199205e","https://git.kernel.org/stable/c/717b078bc745ba9a262abebed9806a17e8bbb77b","https://git.kernel.org/stable/c/41e46b3c2aa24f755b2ae9ec4ce931ba5f0d8532"],"weaknesses":["CWE-667"],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49406.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49406","state":"PUBLISHED","datePublished":"2025-02-26T02:12:31.086Z","dateUpdated":"2026-05-11T18:59:08.671Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T02:08:31.566Z"},"containers":{"cna":{"title":"block: Fix potential deadlock in blk_ia_range_sysfs_show()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: Fix potential deadlock in blk_ia_range_sysfs_show()\n\nWhen being read, a sysfs attribute is already protected against removal\nwith the kobject node active reference counter. As a result, in\nblk_ia_range_sysfs_show(), there is no need to take the queue sysfs\nlock when reading the value of a range attribute. Using the queue sysfs\nlock in this function creates a potential deadlock situation with the\ndisk removal, something that a lockdep signals with a splat when the\ndevice is removed:\n\n[  760.703551]  Possible unsafe locking scenario:\n[  760.703551]\n[  760.703554]        CPU0                    CPU1\n[  760.703556]        ----                    ----\n[  760.703558]   lock(&q->sysfs_lock);\n[  760.703565]                                lock(kn->active#385);\n[  760.703573]                                lock(&q->sysfs_lock);\n[  760.703579]   lock(kn->active#385);\n[  760.703587]\n[  760.703587]  *** DEADLOCK ***\n\nSolve this by removing the mutex_lock()/mutex_unlock() calls from\nblk_ia_range_sysfs_show()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a2247f19ee1c5ad75ef095cdfb909a3244b88aa8","status":"affected","lessThan":"dc107c805cde709866b59867ef72b9390199205e","versionType":"git"},{"version":"a2247f19ee1c5ad75ef095cdfb909a3244b88aa8","status":"affected","lessThan":"717b078bc745ba9a262abebed9806a17e8bbb77b","versionType":"git"},{"version":"a2247f19ee1c5ad75ef095cdfb909a3244b88aa8","status":"affected","lessThan":"41e46b3c2aa24f755b2ae9ec4ce931ba5f0d8532","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-ia-ranges.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.16","versionType":"semver"},{"version":"5.17.14","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.3","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-ia-ranges.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/dc107c805cde709866b59867ef72b9390199205e"},{"url":"https://git.kernel.org/stable/c/717b078bc745ba9a262abebed9806a17e8bbb77b"},{"url":"https://git.kernel.org/stable/c/41e46b3c2aa24f755b2ae9ec4ce931ba5f0d8532"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T18:59:08.671Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.17.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2022-49406","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T19:41:15.505282Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-667","lang":"en","type":"CWE","description":"CWE-667 Improper Locking"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T19:46:50.291Z"}}]}}}