CVE-2026-84268

Summary

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.

Affected Software

VendorProductVersion RangeStatus
GNOMEgvfs0 < 1.60.2affected

Weaknesses

  • CWE-122: Heap-based Buffer Overflow

Workarounds

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

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References