{"id":"CVE-2026-98832","revision":"5bd21d354f5645c48be566c8212cb4b9","records":[{"revision":"5bd21d354f5645c48be566c8212cb4b9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98832","aliases":[],"title":"blk-cgroup: save IRQ state in blkg_tryget_closest()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: save IRQ state in blkg_tryget_closest()\n\nbio_set_dev() associates the bio with a blkg through bio_associate_blkg().\nIf the blkg lookup misses, blkg_tryget_closest() takes q->queue_lock with\nspin_lock_irq() and releases it with spin_unlock_irq(), which\nunconditionally enables local interrupts.\n\nCallers may call bio_set_dev() with interrupts already disabled, e.g.\ndm-thin's pool_map() does so while holding pool->lock taken with\nspin_lock_irq().  The nested spin_unlock_irq() then enables interrupts\nwhile pool->lock is still held, so an I/O completion softirq can run on\nthe same CPU, re-acquire pool->lock (thin_endio(), or overwrite_endio()\n-> complete_mapping_preparation()) and deadlock.  lockdep reports this\nas inconsistent SOFTIRQ-ON-W to IN-SOFTIRQ-W usage.\n\nCommit 3a762de55b4e (\"block: save irq state in blkg_lookup_create()\")\nfixed the same problem while the lock lived in blkg_lookup_create(), but\ncommit 9327a865e395 (\"blk-cgroup: don't nest queue_lock under rcu in\nblkg_lookup_create()\") moved the locking into blkg_tryget_closest() and\nreverted it to spin_lock_irq().\n\nSave and restore the caller's IRQ state instead.","state":0,"publishedAt":"2026-10-18T15:49:36.925+00:00","modifiedAt":"2026-10-19T09:26:24.782+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"block/blk-cgroup.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"9327a865e395a53f67dffac4710beb1d4730495e\",\n                            \"lessThan\": \"9fcf4317384ce6758c3127a6e8914c54cbb9c8cc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9327a865e395a53f67dffac4710beb1d4730495e\",\n                            \"lessThan\": \"327c428ba79b13e4cc5253333a9d5c0aa5579bdf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"block/blk-cgroup.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.10\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/9fcf4317384ce6758c3127a6e8914c54cbb9c8cc","https://git.kernel.org/stable/c/327c428ba79b13e4cc5253333a9d5c0aa5579bdf"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98832","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98832","identifiers":["CVE-2026-98832"]},"retained":false,"historicalAffected":[]}],"coverage":[]}