CVE-2026-80878 afs: Fix leak of ungot volume
A memory leak in the Linux kernel AFS filesystem allows attackers to cause a denial of service by triggering volume lookup failures.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80878?
CVE-2026-80878 is a denial of service vulnerability in Linux, published on 4 Sep 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:
afs: Fix leak of ungot volume
Fix afs_lookup_volume_rcu() so that it doesn't leak a dying volume if afs_try_get_volume() fails.
Which versions are affected by CVE-2026-80878?
How do I fix CVE-2026-80878?
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-2026-80878 being exploited?
There is no known exploitation of CVE-2026-80878 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80878, DEBIAN-CVE-2026-80878, GHSA-hp66-9q6w-hjwg, UBUNTU-CVE-2026-80878.