SB2026050207 - Use-after-free in Linux kernel microsoft mana driver
Published: May 2, 2026
Security Bulletin ID
SB2026050207
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-43056)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in add_adev() when handling an error path after auxiliary_device_add() fails. A local user can trigger the failure condition to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/43f5b19fd190fea20d052bc84741b28031d5baa9
- https://git.kernel.org/stable/c/5f4061f8225d18695e5afe9bbf1cb7bd673d7872
- https://git.kernel.org/stable/c/c4ea7d8907cf72b259bf70bd8c2e791e1c4ff70f
- https://git.kernel.org/stable/c/d88541ffd56d62a61e77209080001eddd4d69815
- https://git.kernel.org/stable/c/e5a75bf026c686b91a7dc6f9c5caf5016745d1fe