CVE-2022-49995
- Source
- https://cve.org/CVERecord?id=CVE-2022-49995
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49995.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-49995
- Downstream
- Related
- Published
- 2025-06-18T11:00:55Z
- Modified
- 2026-08-12T03:51:31Z
- 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
- writeback: avoid use-after-free after removing device
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
writeback: avoid use-after-free after removing device
When a disk is removed, bdi_unregister gets called to stop further writeback and wait for associated delayed work to complete. However, wb_inode_writeback_end() may schedule bandwidth estimation dwork after this has completed, which can result in the timer attempting to access the just freed bdi_writeback.
Fix this by checking if the bdi_writeback is alive, similar to when scheduling writeback work.
Since this requires wb->work_lock, and wb_inode_writeback_end() may get called from interrupt, switch wb->work_lock to an irqsafe lock.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49995.json" }- References
-
- https://git.kernel.org/stable/c/9a6c710f3bc10bc9cc23e1c080b53245b7f9d5b7
- https://git.kernel.org/stable/c/f87904c075515f3e1d8f4a7115869d3b914674fd
- https://git.kernel.org/stable/c/f96b9f7c1676923bce871e728bb49c0dfa5013cc
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49995.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-49995
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git