CVE-2026-43163 Details
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.
A use-after-free race condition has been identified in the Linux kernel's md/bitmap module, specifically during the bitmap resizing process. This vulnerability leads to a General Protection Fault (GPF) in the write_page() function. The issue arises because the bitmap daemon works on the storage filemap without proper locking, while the resize operation concurrently frees that storage. As a result, the daemon can access freed pages, causing instability. The vulnerability affects several versions of the Linux kernel.
The vulnerability has been fixed in the Linux kernel. Users should upgrade to the latest version.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/140cc839fbeb1ddb33a8da8811b716d88d3905b7 | kernel.org | Patch |
| https://git.kernel.org/stable/c/46ef85f854dfa9d5226b3c1c46493d79556c9589 | kernel.org | Patch |
| https://git.kernel.org/stable/c/5f73c8b33df9a605a591eab72d43a969600c1f8c | kernel.org | Patch |
| https://git.kernel.org/stable/c/9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f | kernel.org | Patch |
| https://git.kernel.org/stable/c/a437e3bf30e32846079e470c1ba5ee790bccdf89 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d3af62411e19752c663fe4f424dbf49d95a4cc7c | kernel.org | Patch |
| https://git.kernel.org/stable/c/d92b8fac294b5f915c50e65ce4ae2262e53614ec | kernel.org | Patch |
| https://git.kernel.org/stable/c/ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-362 | Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 3.5, < 5.10.252 >= 5.11, < 5.15.202 >= 5.16, < 6.1.165 >= 6.2, < 6.6.128 >= 6.7, < 6.12.75 >= 6.13, < 6.18.16 >= 6.19, < 6.19.6 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 13, 2026 | Initial Analysis | [email protected] |
| May 6, 2026 | New CVE Received | kernel.org |