Improper Initialization in Linux kernel - CVE-2026-31689
Published: April 27, 2026
Vulnerability identifier: #VU128245
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31689
CWE-ID: CWE-665
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper initialization in edac_mc_alloc() when handling a failed mci->pvt_info allocation. A local user can trigger the vulnerable error path to cause a denial of service.
The issue occurs because put_device() may invoke the device release function before device initialization has completed.
How to mitigate CVE-2026-31689
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/51520e03e70d6c73e33ee7cbe0319767d05764fe
- https://git.kernel.org/stable/c/75825648ce984ca4cebb28e4bd2bf8c3a7e837c5
- https://git.kernel.org/stable/c/87ce8ae511962e105bcb3534944208c6a9471ed9
- https://git.kernel.org/stable/c/aae95970fad2127a1bd49d8713c7cd0677dcd2d6
- https://git.kernel.org/stable/c/d20e98c2df9354cc744431ad8ccbf49405b8b40f
- https://git.kernel.org/stable/c/d3de72e2a2b9ee3a57734c1c068823e41a707715