CVE-2026-43163

Advisory lineage Upstream: 0 Downstream: 9
Analyzed
Published: 06 May 2026, 11:27
Last modified:11 May 2026, 22:18

Vulnerability Summary

Overall Risk (default)
low
19/100
CVSS Score
4.7 MEDIUM
v3.1 (nvd)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 May 2026, 11:27
Published
Vulnerability first disclosed
11 May 2026, 22:18
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•MEDIUM•Score: 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 2%

Techniques & Countermeasures

  • CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

    The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Affected Systems

  • linux•linux

    ≥ d60b479d177a5735b6b4db6ee5280ef6653f50e7, < 140cc839fbeb1ddb33a8da8811b716d88d3905b7 | ≥ d60b479d177a5735b6b4db6ee5280ef6653f50e7, < ebcacc7ca22d5e8a03a970f0621ae1d1356b9ae8 | ≥ d60b479d177a5735b6b4db6ee5280ef6653f50e7, < d3af62411e19752c663fe4f424dbf49d95a4cc7c | ≥ d60b479d177a5735b6b4db6ee5280ef6653f50e7, < d92b8fac294b5f915c50e65ce4ae2262e53614ec | ≥ d60b479d177a5735b6b4db6ee5280ef6653f50e7, < a437e3bf30e32846079e470c1ba5ee790bccdf89 | ≥ d60b479d177a5735b6b4db6ee5280ef6653f50e7, < 9a6f8cd28bb9bb6ed86a6df19331fb08016dee7f | ≥ d60b479d177a5735b6b4db6ee5280ef6653f50e7, < 5f73c8b33df9a605a591eab72d43a969600c1f8c | ≥ d60b479d177a5735b6b4db6ee5280ef6653f50e7, < 46ef85f854dfa9d5226b3c1c46493d79556c9589 | 3.5

  • 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

References (8)