CVE-2022-49995
- Source
- https://nvd.nist.gov/vuln/detail/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
- 2025-10-21T12:14:48.572874Z
- 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, bdiunregister gets called to stop further writeback and wait for associated delayed work to complete. However, wbinodewritebackend() 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->worklock, and wbinodewritebackend() may get called from interrupt, switch wb->work_lock to an irqsafe lock.
- References
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced45a2966fd64147518dc5bca25f447bd0fb5359acFixedf96b9f7c1676923bce871e728bb49c0dfa5013cc
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced45a2966fd64147518dc5bca25f447bd0fb5359acFixed9a6c710f3bc10bc9cc23e1c080b53245b7f9d5b7
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced45a2966fd64147518dc5bca25f447bd0fb5359acFixedf87904c075515f3e1d8f4a7115869d3b914674fd
Affected versions
v5.*
v5.15
v5.15-rc1
v5.15-rc2
v5.15-rc3
v5.15-rc4
v5.15-rc5
v5.15-rc6
v5.15-rc7
v5.15.1
v5.15.10
v5.15.11
v5.15.12
v5.15.13
v5.15.14
v5.15.15
v5.15.16
v5.15.17
v5.15.18
v5.15.19
v5.15.2
v5.15.20
v5.15.21
v5.15.22
v5.15.23
v5.15.24
v5.15.25
v5.15.26
v5.15.27
v5.15.28
v5.15.29
v5.15.3
v5.15.30
v5.15.31
v5.15.32
v5.15.33
v5.15.34
v5.15.35
v5.15.36
v5.15.37
v5.15.38
v5.15.39
v5.15.4
v5.15.40
v5.15.41
v5.15.42
v5.15.43
v5.15.44
v5.15.45
v5.15.46
v5.15.47
v5.15.48
v5.15.49
v5.15.5
v5.15.50
v5.15.51
v5.15.52
v5.15.53
v5.15.54
v5.15.55
v5.15.56
v5.15.57
v5.15.58
v5.15.59
v5.15.6
v5.15.60
v5.15.61
v5.15.62
v5.15.63
v5.15.7
v5.15.8
v5.15.9
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.19
v5.19-rc1
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8
v5.19.1
v5.19.2
v5.19.3
v5.19.4
v5.19.5
v6.*
v6.0-rc1
v6.0-rc2