Use-after-free in Linux kernel - CVE-2026-74441
Published: August 16, 2026
Vulnerability identifier: #VU143339
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-74441
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in the UCSI port unregistration logic when tearing down UCSI connector ports with pending partner work items. A local user can trigger port unregistration while delayed work remains pending to cause a denial of service.
The issue can also involve a double release of resources caused by work items being scheduled again while already pending.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74441
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.105-1
linux (Debian package) - update to 6.12.105-1
External References
- https://git.kernel.org/stable/c/07f8aaffee705e552c1f723ac8bf7eb137ad59c2
- https://git.kernel.org/stable/c/11483d80267db97fbe49f2df66385434256cc3b0
- https://git.kernel.org/stable/c/3f7b3728dd9011c915cbeaea77274ebe8366550d
- https://git.kernel.org/stable/c/7aa7d4bf9d3fa9a6a47b640ad103ab433b7ff261
- https://git.kernel.org/stable/c/bc7a0f721123ea260a42f1ded06dab844ba49434