{"api_version":"1","generated_at":"2026-07-23T14:33:39+00:00","cve":"CVE-2026-53126","urls":{"html":"https://cve.report/CVE-2026-53126","api":"https://cve.report/api/cve/CVE-2026-53126.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53126","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53126"},"summary":{"title":"blk-cgroup: fix disk reference leak in blkcg_maybe_throttle_current()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: fix disk reference leak in blkcg_maybe_throttle_current()\n\nAdd the missing put_disk() on the error path in\nblkcg_maybe_throttle_current(). When blkcg lookup, blkg lookup, or\nblkg_tryget() fails, the function jumps to the out label which only\ncalls rcu_read_unlock() but does not release the disk reference acquired\nby blkcg_schedule_throttle() via get_device(). Since current->throttle_disk\nis already set to NULL before the lookup, blkcg_exit() cannot release\nthis reference either, causing the disk to never be freed.\n\nRestore the reference release that was present as blk_put_queue() in the\noriginal code but was inadvertently dropped during the conversion from\nrequest_queue to gendisk.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 17:17:27","updated_at":"2026-07-14 15:26:52"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/73a5af059905d171b398c8b2381632ee499948b5","name":"https://git.kernel.org/stable/c/73a5af059905d171b398c8b2381632ee499948b5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/23308af722fefed00af5f238024c11710938fba3","name":"https://git.kernel.org/stable/c/23308af722fefed00af5f238024c11710938fba3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4048ed98860d3785645ebbd34f69566a6c7320c3","name":"https://git.kernel.org/stable/c/4048ed98860d3785645ebbd34f69566a6c7320c3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/000e8454692cab9d1f1b80130e2870e355301d06","name":"https://git.kernel.org/stable/c/000e8454692cab9d1f1b80130e2870e355301d06","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b3e005f16cd98f815429a87aef4c61e9c140779f","name":"https://git.kernel.org/stable/c/b3e005f16cd98f815429a87aef4c61e9c140779f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53126","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53126","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f05837ed73d0c73e950b2d9f2612febb0d3d451e 4048ed98860d3785645ebbd34f69566a6c7320c3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f05837ed73d0c73e950b2d9f2612febb0d3d451e 73a5af059905d171b398c8b2381632ee499948b5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f05837ed73d0c73e950b2d9f2612febb0d3d451e b3e005f16cd98f815429a87aef4c61e9c140779f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f05837ed73d0c73e950b2d9f2612febb0d3d451e 000e8454692cab9d1f1b80130e2870e355301d06 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f05837ed73d0c73e950b2d9f2612febb0d3d451e 23308af722fefed00af5f238024c11710938fba3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.141 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.91 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.33 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.10 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"53126","cve":"CVE-2026-53126","epss":"0.001570000","percentile":"0.052350000","score_date":"2026-07-14","updated_at":"2026-07-15 00:14:55"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["block/blk-cgroup.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4048ed98860d3785645ebbd34f69566a6c7320c3","status":"affected","version":"f05837ed73d0c73e950b2d9f2612febb0d3d451e","versionType":"git"},{"lessThan":"73a5af059905d171b398c8b2381632ee499948b5","status":"affected","version":"f05837ed73d0c73e950b2d9f2612febb0d3d451e","versionType":"git"},{"lessThan":"b3e005f16cd98f815429a87aef4c61e9c140779f","status":"affected","version":"f05837ed73d0c73e950b2d9f2612febb0d3d451e","versionType":"git"},{"lessThan":"000e8454692cab9d1f1b80130e2870e355301d06","status":"affected","version":"f05837ed73d0c73e950b2d9f2612febb0d3d451e","versionType":"git"},{"lessThan":"23308af722fefed00af5f238024c11710938fba3","status":"affected","version":"f05837ed73d0c73e950b2d9f2612febb0d3d451e","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["block/blk-cgroup.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.3"},{"lessThan":"6.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.141","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.91","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.33","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.141","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.91","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.33","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.10","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: fix disk reference leak in blkcg_maybe_throttle_current()\n\nAdd the missing put_disk() on the error path in\nblkcg_maybe_throttle_current(). When blkcg lookup, blkg lookup, or\nblkg_tryget() fails, the function jumps to the out label which only\ncalls rcu_read_unlock() but does not release the disk reference acquired\nby blkcg_schedule_throttle() via get_device(). Since current->throttle_disk\nis already set to NULL before the lookup, blkcg_exit() cannot release\nthis reference either, causing the disk to never be freed.\n\nRestore the reference release that was present as blk_put_queue() in the\noriginal code but was inadvertently dropped during the conversion from\nrequest_queue to gendisk."}],"providerMetadata":{"dateUpdated":"2026-06-24T16:30:54.594Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/4048ed98860d3785645ebbd34f69566a6c7320c3"},{"url":"https://git.kernel.org/stable/c/73a5af059905d171b398c8b2381632ee499948b5"},{"url":"https://git.kernel.org/stable/c/b3e005f16cd98f815429a87aef4c61e9c140779f"},{"url":"https://git.kernel.org/stable/c/000e8454692cab9d1f1b80130e2870e355301d06"},{"url":"https://git.kernel.org/stable/c/23308af722fefed00af5f238024c11710938fba3"}],"title":"blk-cgroup: fix disk reference leak in blkcg_maybe_throttle_current()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53126","datePublished":"2026-06-24T16:30:54.594Z","dateReserved":"2026-06-09T07:44:35.386Z","dateUpdated":"2026-06-24T16:30:54.594Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 17:17:27","lastModifiedDate":"2026-07-14 15:26:52","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53126","Ordinal":"1","Title":"blk-cgroup: fix disk reference leak in blkcg_maybe_throttle_curr","CVE":"CVE-2026-53126","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53126","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: fix disk reference leak in blkcg_maybe_throttle_current()\n\nAdd the missing put_disk() on the error path in\nblkcg_maybe_throttle_current(). When blkcg lookup, blkg lookup, or\nblkg_tryget() fails, the function jumps to the out label which only\ncalls rcu_read_unlock() but does not release the disk reference acquired\nby blkcg_schedule_throttle() via get_device(). Since current->throttle_disk\nis already set to NULL before the lookup, blkcg_exit() cannot release\nthis reference either, causing the disk to never be freed.\n\nRestore the reference release that was present as blk_put_queue() in the\noriginal code but was inadvertently dropped during the conversion from\nrequest_queue to gendisk.","Type":"Description","Title":"blk-cgroup: fix disk reference leak in blkcg_maybe_throttle_curr"}]}}}