CVE-2026-80877 afs: Fix vllist leak
A memory leak in the Linux kernel's AFS filesystem allows attackers to cause a denial of service by exhausting system memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80877?
CVE-2026-80877 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 vllist leak
Fix a leak of the new vllist in afs_update_cell() in the event that it is an empty list (nr_servers == 0), in which case the old list isn't displaced unless the old list is also empty.
Which versions are affected by CVE-2026-80877?
How do I fix CVE-2026-80877?
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-2026-80877 being exploited?
There is no known exploitation of CVE-2026-80877 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80877, DEBIAN-CVE-2026-80877, GHSA-phph-62rf-vgjm, UBUNTU-CVE-2026-80877.