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high · CVSS 8.8

CVE-2026-84268

Gvfs: sftp: heap-based buffer overflow in read_reply()

Published 1 Sept 2026 · Source updated 4 Nov 2026 · Retrieved 2026-11-06 14:25 UTC

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What happened?

A flaw was found in the SFTP backend in gvfs. When mounting a share and reading a file, a malicious SFTP server can cause read_reply() to process a length that exceeds the size requested by the client. The function does not verify the server-provided length against the allocated buffer size, causing the operation to write past the intended boundaries. This issue allows a malicious server to corrupt adjacent heap memory in the gvfsd-sftp process, resulting in a denial of service as the process aborts upon detecting the heap corruption or potentially allowing arbitrary code execution.

Description supplied by CVE Program. Formatting is simplified; follow the original advisory for full details.

Affected software and versions

Source-provided software and version information
SoftwareVersion informationFixed version
gvfsGNOMEaffected: 0 to < 1.60.2See vendor advisory
gvfsRed Hatunaffected: 0:1.54.4-4.el10_2.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.54.4-2.el10_0.2 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.36.2-7.el7_9.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.36.2-22.el8_10 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.36.2-11.el8_4.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.36.2-11.el8_4.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.36.2-11.el8_6.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.36.2-11.el8_6.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.36.2-14.el8_8.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.36.2-14.el8_8.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.48.1-8.el9_8.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.48.1-4.el9_2.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.48.1-4.el9_4.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.48.1-6.el9_6.1 to < *See vendor advisory
gvfsRed HatDefault status: unknownSee vendor advisory

Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.

Is it being exploited?

This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.

CISA data retrieved 2026-11-06 16:38 UTC. Check CISA ↗

How to respond

  1. Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
  2. Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
  3. Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.

Sources and remediation references

This public advisory does not determine whether a particular server is affected. Records are refreshed as sources change; verify urgent decisions against the original advisory.

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