nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse A syzbot stress test using a corrupted disk image reported that mark_buffer_dirty() called from __nilfs_mark_inode_dirty() or nilfs_palloc_commit_alloc_entry() may output a kernel warning, and can panic if the kernel is booted with panic_on_warn. This is because nilfs2 keeps buffer pointers in local structures for some metadata and reuses them, but such buffers may be forcibly discarded by nilfs_clear_dirty_page() in some critical situations. This issue is reported to appear after commit 28a65b49eb53 ("nilfs2: do not write dirty data after degenerating to read-only"), but the issue has potentially existed before. Fix this issue by checking the uptodate flag when attempting to reuse an internally held buffer, and reloading the metadata instead of reusing the buffer if the flag was lost.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 3.10 and later | 4.14.326, 4.19.295, 5.4.257, 5.10.195, 5.15.131, 6.1.52, 6.4.15, 6.5.2, 6.6 | Patch available | CNA |
- Linux VendorLinux Affected 3.10 and later Fixed in 4.14.326, 4.19.295, 5.4.257, 5.10.195, 5.15.131, 6.1.52, 6.4.15, 6.5.2, 6.6 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.14.326, 4.19.295, 5.4.257, 5.10.195, 5.15.131, 6.1.52, 6.4.15, 6.5.2, 6.6
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-54140
- 2026-10-03 Alias added: GHSA-8vr5-q73g-2w33
References
Other 9
- https://git.kernel.org/stable/c/473795610594f261e98920f0945550314df36f07
- https://git.kernel.org/stable/c/d95e403588738c7ec38f52b9f490b15e7745d393
- https://git.kernel.org/stable/c/99a73016a5e12a09586a96f998e91f9ea145cd00
- https://git.kernel.org/stable/c/f1d637b63d8a27ac3386f186a694907f2717fc13
- https://git.kernel.org/stable/c/b911bef132a06de01a745c6a24172d6db7216333
- https://git.kernel.org/stable/c/4da07e958bfda2d69d83db105780e8916e3ac02e
- https://git.kernel.org/stable/c/46c11be2dca295742a5508ea910a77f7733fb7f4
- https://git.kernel.org/stable/c/b308b3eabc429649b5501d36290cea403fbd746c
- https://git.kernel.org/stable/c/cdaac8e7e5a059f9b5e816cda257f08d0abffacd
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Sources
- CVE-2023-54140 · CVE Program
- CVE-2023-54140 · NVD
- FIRST EPSS
- GHSA-8vr5-q73g-2w33 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-54140 · Red Hat security data · CC BY 4.0
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