CVE-2026-84269

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.

To exploit this issue, an attacker needs a user to connect to a malicious AFP share (for example, by clicking a crafted afp:// link), limiting its exposure. Furthermore, the direct security impact of this flaw is a denial of service due to the heap-based buffer overflow. For these reasons, this vulnerability has been rated with a moderate severity.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this vulnerability, do not connect to untrusted AFP servers.