Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: md/bitmap: fix GPF in write_page caused by resize race A General Protection Fault occurs in write_page() during array resize: RIP: 0010:write_page+0x22b/0x3c0 [md_mod] This is a use-after-free race between bitmap_daemon_work() and __bitmap_resize(). The daemon iterates over `bitmap->storage.filemap` without locking, while the resize path frees that storage via md_bitmap_file_unmap(). `quiesce()` does not stop the md thread, allowing concurrent access to freed pages. Fix by holding `mddev->bitmap_info.mutex` during the bitmap update.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.5, < 5.10.252 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/140cc839fbeb1ddb33a8da8811b716d88d3905b7Patch
- https://git.kernel.org/stable/c/46ef85f854dfa9d5226b3c1c46493d79556c9589Patch
- https://git.kernel.org/stable/c/5f73c8b33df9a605a591eab72d43a969600c1f8cPatch
- https://git.kernel.org/stable/c/9a6f8cd28bb9bb6ed86a6df19331fb08016dee7fPatch
- https://git.kernel.org/stable/c/a437e3bf30e32846079e470c1ba5ee790bccdf89Patch
- https://git.kernel.org/stable/c/d3af62411e19752c663fe4f424dbf49d95a4cc7cPatch
- https://git.kernel.org/stable/c/d92b8fac294b5f915c50e65ce4ae2262e53614ecPatch
- https://git.kernel.org/stable/c/ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8Patch
FAQ
What is CVE-2026-43163?
CVE-2026-43163 is a vulnerability with a CVSS score of 4.7 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: md/bitmap: fix GPF in write_page caused by resize race A General Protection Fault occurs in write_page() during array resize: RIP:...
How severe is CVE-2026-43163?
CVE-2026-43163 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43163?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.