CVE-2022-49377
- Source
- https://cve.org/CVERecord?id=CVE-2022-49377
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49377.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-49377
- Downstream
- Related
- Published
- 2025-02-26T02:11:16.607Z
- Modified
- 2026-05-15T11:54:12.169377230Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- blk-mq: don't touch ->tagset in blk_mq_get_sq_hctx
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
blk-mq: don't touch ->tagset in blkmqgetsqhctx
blkmqrunhwqueues() could be run when there isn't queued request and after queue is cleaned up, at that time tagset is freed, because tagset lifetime is covered by driver, and often freed after blkcleanupqueue() returns.
So don't touch ->tagset for figuring out current default hctx by the mapping built in request queue, so use-after-free on tagset can be avoided. Meantime this way should be fast than retrieving mapping from tagset.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49377.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/460aa288c5cd0544dcf933a2f0ad0e8c6d2d35ff
- https://git.kernel.org/stable/c/5d05426e2d5fd7df8afc866b78c36b37b00188b7
- https://git.kernel.org/stable/c/70fdd922c7bf8949f8df109cf2635dff64c90392
- https://git.kernel.org/stable/c/b140bac470b4f707cda59c7266214246238661df
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49377.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-49377
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git