CVE-2026-68379 tcp: fix TIME_WAIT socket reference leak on PSP policy failure
A memory leak in the Linux kernel TCP stack allows attackers to exhaust system memory via PSP policy failures, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68379?
CVE-2026-68379 is a high-severity memory corruption vulnerability in Linux, published on 10 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
tcp: fix TIME_WAIT socket reference leak on PSP policy failure
Release the TIME_WAIT socket reference and jump to discard_it upon PSP policy failure in both IPv4 and IPv6 receive paths. This prevents a memory leak of tcp_tw_bucket structures.
Which versions are affected by CVE-2026-68379?
How do I fix CVE-2026-68379?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-68379 being exploited?
There is no known exploitation of CVE-2026-68379 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68379, DEBIAN-CVE-2026-68379, GHSA-hqwg-h56w-34xh, UBUNTU-CVE-2026-68379.