Memory leak in Linux kernel - CVE-2026-74719
Published: August 24, 2026
Vulnerability identifier: #VU144618
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74719
CWE-ID: CWE-401
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a memory leak in smc_llc_event_handler() when handling duplicate CONFIRM_LINK or ADD_LINK_CONT messages while a local LLC flow is active and a qentry is already pending. A remote attacker can send duplicate crafted messages to cause a denial of service.
The issue affects the SMC_LLC_CONFIRM_LINK and SMC_LLC_ADD_LINK_CONT handling path, while the response direction is not affected.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74719
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/06734dfeaeba886aab1bf147249195b888ac3e4d
- https://git.kernel.org/stable/c/10cb31b2b74cb664c6c95cf72364d7d5c483ab82
- https://git.kernel.org/stable/c/976245094925bab9bc39366b2e9ab44ffcde61d0
- https://git.kernel.org/stable/c/a1e980d7a9e7ee6faf4f5fd7b450413b969af26d
- https://git.kernel.org/stable/c/bfc336a9fbbf09805f3dfe25c195a4db90af2846
- https://git.kernel.org/stable/c/c23c409228629107203d3c3e95fff1473173f1a6
- https://git.kernel.org/stable/c/e0eb87677c76b157cdf8eb7c1f19e56227165a33
- https://git.kernel.org/stable/c/e384f3cba6ea709f5b2272b1770db4ce14047f78