# CVE-2026-84269: GNOME gvfs AFP backend heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-84269-gnome-gvfs-afp-backend-heap-buffer-overflow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-01. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-84269 · Severity: medium · CVSS 6.5 · Published 2026-09-01

GNOME gvfs is a virtual filesystem implementation that handles mounting remote file shares. A malicious AFP (Apple Filing Protocol) server can trigger a heap buffer overflow in the gvfsd-afp daemon when a client mounts a share, causing the service to crash and making the client unable to access their remote files (denial of service).

Technologies: [Gnome Gvfs](https://junglewise.ai/threats/technologies/gvfs). Vendors: [Gnome](https://junglewise.ai/threats/vendors/gnome).

## Quick answers

**Is CVE-2026-84269 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-84269 being exploited in the wild.

**How severe is CVE-2026-84269?** Medium severity, with a CVSS score of 6.5, published 1 September 2026.

**Which products and versions are affected?** Gnome Gvfs <UNKNOWN>.

**Is there a fix for CVE-2026-84269?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-84269 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-84269?** Check whether you run Gnome Gvfs at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a heap buffer overflow in the AFP backend's DSI (Data Stream Interface) read path. When processing a server response during share mounting, the code fails to validate that the length field provided by a malicious AFP server stays within the bounds of the pre-allocated reply buffer. An attacker running a malicious AFP server can craft a response with an oversized length value, causing the read operation to access memory past the intended buffer boundaries. This results in heap corruption and crashes the gvfsd-afp process. The attack requires that a client initiates a connection to the attacker-controlled server; no authentication bypass or prior local access is necessary.

## Affected products

- GNOME gvfs <UNKNOWN>

## Timeline

- 2026-09-01: disclosed

## References

- [https://gitlab.gnome.org/GNOME/gvfs](https://gitlab.gnome.org/GNOME/gvfs)
- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)

## Related threats

- [GNOME gvfs privilege escalation via symlink TOCTOU in admin daemon](https://junglewise.ai/threats/cve-2026-88924-gnome-gvfs-privilege-escalation-via-symlink-toctou-in-admin)
- [GNOME gvfs buffer overflow in MTP backend](https://junglewise.ai/threats/cve-2026-84270-gnome-gvfs-buffer-overflow-in-mtp-backend)
- [GNOME gvfs SFTP backend heap overflow](https://junglewise.ai/threats/cve-2026-84268-gnome-gvfs-sftp-backend-heap-overflow)
- [GNOME gvfs SFTP buffer read vulnerability](https://junglewise.ai/threats/cve-2026-84267-gnome-gvfs-sftp-buffer-read-vulnerability)