CVE-2026-43163
md/bitmap: fix GPF in write_page caused by resize race
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
3.5
References 8
git.kernel.org
- stable/c/140cc839fbeb1ddb33a8da8811b716d88d3905b7
- stable/c/ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8
- stable/c/d3af62411e19752c663fe4f424dbf49d95a4cc7c
- stable/c/d92b8fac294b5f915c50e65ce4ae2262e53614ec
- stable/c/a437e3bf30e32846079e470c1ba5ee790bccdf89
- stable/c/9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f
- stable/c/5f73c8b33df9a605a591eab72d43a969600c1f8c
- stable/c/46ef85f854dfa9d5226b3c1c46493d79556c9589