blk-mq: use quiesced elevator switch when reinitializing queues

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2022-50552
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-10-07 16:15:41 UTC
Updated2026-06-01 17:16:23 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: blk-mq: use quiesced elevator switch when reinitializing queues The hctx's run_work may be racing with the elevator switch when reinitializing hardware queues. The queue is merely frozen in this context, but that only prevents requests from allocating and doesn't stop the hctx work from running. The work may get an elevator pointer that's being torn down, and can result in use-after-free errors and kernel panics (example below). Use the quiesced elevator switch instead, and make the previous one static since it is now only used locally. nvme nvme0: resetting controller nvme nvme0: 32/0/0 default/read/poll queues BUG: kernel NULL pointer dereference, address: 0000000000000008 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 80000020c8861067 P4D 80000020c8861067 PUD 250f8c8067 PMD 0 Oops: 0000 [#1] SMP PTI Workqueue: kblockd blk_mq_run_work_fn RIP: 0010:kyber_has_work+0x29/0x70 ... Call Trace: __blk_mq_do_dispatch_sched+0x83/0x2b0 __blk_mq_sched_dispatch_requests+0x12e/0x170 blk_mq_sched_dispatch_requests+0x30/0x60 __blk_mq_run_hw_queue+0x2b/0x50 process_one_work+0x1ef/0x380 worker_thread+0x2d/0x3e0

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-416

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d48ece209f82c9ce07be942441b53d3fa3664936 0f90015383cd3f1128bebfbe7a97122d97808046 git Not specified
CNA Linux Linux affected d48ece209f82c9ce07be942441b53d3fa3664936 9646443f28f33ec545ae303e613c3f476fad4dc1 git Not specified
CNA Linux Linux affected d48ece209f82c9ce07be942441b53d3fa3664936 63a681bcc32a43528ce0f690569f7f48e59c3963 git Not specified
CNA Linux Linux affected d48ece209f82c9ce07be942441b53d3fa3664936 c478b3b2900f1834cf9eda5bfef0d5696099505d git Not specified
CNA Linux Linux affected d48ece209f82c9ce07be942441b53d3fa3664936 8237c01f1696bc53c470493bf1fe092a107648a6 git Not specified
CNA Linux Linux affected 4.19 Not specified
CNA Linux Linux unaffected 4.19 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 5.19.17 5.19.* semver Not specified
CNA Linux Linux unaffected 6.0.3 6.0.* semver Not specified
CNA Linux Linux unaffected 6.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/8237c01f1696bc53c470493bf1fe092a107648a6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0f90015383cd3f1128bebfbe7a97122d97808046 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9646443f28f33ec545ae303e613c3f476fad4dc1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/63a681bcc32a43528ce0f690569f7f48e59c3963 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c478b3b2900f1834cf9eda5bfef0d5696099505d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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