CVE-2026-84269 Gvfs: afp: heap-based buffer overflow in dsi read path
A malicious AFP server can trigger a heap buffer overflow in gvfs, crashing the client process and causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-84269?
CVE-2026-84269 is a medium-severity memory corruption vulnerability in GNOME Red Hat Enterprise Linux 10, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A flaw was found in the AFP backend in gvfs. When mounting a share, a malicious AFP server can cause the DSI read path to process a length that exceeds the size requested by the client. The function does not verify the server-provided length against the pre-sized reply buffer, causing the operation to access past the intended boundaries. This issue allows a malicious server to overflow a heap buffer and crash the gvfsd-afp process, resulting in a denial of service.
Weakness: CWE-122
Which versions are affected by CVE-2026-84269?
How do I fix CVE-2026-84269?
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-2026-84269 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84269 exists.
Sources
Also known as DEBIAN-CVE-2026-84269, GHSA-7jmj-69v2-2vjf, UBUNTU-CVE-2026-84269.