CVE-2026-74431 rxrpc: Fix potential infinite loop in rxrpc_recvmsg()
A local attacker can cause a denial of service via an infinite loop in the rxrpc_recvmsg function of the Linux kernel.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74431?
CVE-2026-74431 is a high-severity denial of service vulnerability in Linux, published on 15 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:
rxrpc: Fix potential infinite loop in rxrpc_recvmsg()
Fix the wait in rxrpc_recvmsg() also take check the oob queue.
Which versions are affected by CVE-2026-74431?
How do I fix CVE-2026-74431?
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-2026-74431 being exploited?
There is no known exploitation of CVE-2026-74431 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74431, DEBIAN-CVE-2026-74431, GHSA-pvqf-593m-79fg, UBUNTU-CVE-2026-74431.