CVE-2026-43163
md/bitmap: fix GPF in write_page caused by resize race
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 6, 2026 |
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Affected Versions
Linux / Linux
d60b479d177a5735b6b4db6ee5280ef6653f50e7 < 140cc839fbeb1ddb33a8da8811b716d88d3905b7 d60b479d177a5735b6b4db6ee5280ef6653f50e7 < ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8 d60b479d177a5735b6b4db6ee5280ef6653f50e7 < d3af62411e19752c663fe4f424dbf49d95a4cc7c d60b479d177a5735b6b4db6ee5280ef6653f50e7 < d92b8fac294b5f915c50e65ce4ae2262e53614ec d60b479d177a5735b6b4db6ee5280ef6653f50e7 < a437e3bf30e32846079e470c1ba5ee790bccdf89 d60b479d177a5735b6b4db6ee5280ef6653f50e7 < 9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f d60b479d177a5735b6b4db6ee5280ef6653f50e7 < 5f73c8b33df9a605a591eab72d43a969600c1f8c d60b479d177a5735b6b4db6ee5280ef6653f50e7 < 46ef85f854dfa9d5226b3c1c46493d79556c9589
Linux / Linux
3.5
References
git.kernel.org: https://git.kernel.org/stable/c/140cc839fbeb1ddb33a8da8811b716d88d3905b7 git.kernel.org: https://git.kernel.org/stable/c/ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8 git.kernel.org: https://git.kernel.org/stable/c/d3af62411e19752c663fe4f424dbf49d95a4cc7c git.kernel.org: https://git.kernel.org/stable/c/d92b8fac294b5f915c50e65ce4ae2262e53614ec git.kernel.org: https://git.kernel.org/stable/c/a437e3bf30e32846079e470c1ba5ee790bccdf89 git.kernel.org: https://git.kernel.org/stable/c/9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f git.kernel.org: https://git.kernel.org/stable/c/5f73c8b33df9a605a591eab72d43a969600c1f8c git.kernel.org: https://git.kernel.org/stable/c/46ef85f854dfa9d5226b3c1c46493d79556c9589