CVE-2026-68313 tipc: fix infinite loop in __tipc_nl_compat_dumpit
A local attacker can trigger an infinite loop in the TIPC subsystem, causing a denial of service by starving other tasks waiting on the mutex.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68313?
CVE-2026-68313 is a denial of service vulnerability in Linux, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
tipc: fix infinite loop in __tipc_nl_compat_dumpit
cmd->dumpit callback can return a negative errno, causing an infinite loop due to the while(len) condition. As the loop never terminates, genl_mutex is never released, and other tasks waiting on it starve in D state.
Check dumpit's return value, propagate it and jump to err_out on error.
Which versions are affected by CVE-2026-68313?
How do I fix CVE-2026-68313?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-68313 being exploited?
There is no known exploitation of CVE-2026-68313 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68313, DEBIAN-CVE-2026-68313, GHSA-vpjw-59q8-958p, UBUNTU-CVE-2026-68313.