SB2026090593 - Use-after-free in Linux kernel target
Published: September 5, 2026
Security Bulletin ID
SB2026090593
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-2026-80854)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/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 the USB gadget f_tcm session teardown path when concurrently unlinking the last LUN and removing a nexus. A local user can overlap last-LUN removal with nexus removal to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/178f59a0bccd3f66cdfa5184310f31a58b7257c4
- https://git.kernel.org/stable/c/2efbfd42441d3ef8137aff2d59e9835e1d5ae780
- https://git.kernel.org/stable/c/85aa61fedcb4eb13f3dc5db73f6dc359f41f5d95
- https://git.kernel.org/stable/c/ad6f0375d2e93a1d8c015463e5e92dfcb26e311b
- https://git.kernel.org/stable/c/bbd6aa311a9f4dd17822c7557451458d3d2e980b
- https://git.kernel.org/stable/c/c1f359d9a5efed458946063de65ddbeaacc4f165
- https://git.kernel.org/stable/c/c39d0916da47d94909391876c9e5bd429ea7b1b9
- https://git.kernel.org/stable/c/c494c5562ca69b61a82f566e3b87a445d2c28929
- https://git.kernel.org/stable/c/eaa96a8458f54d6cf0954242ab8b1df2a6fccafa