CVE-2026-84268
A flaw was found in the SFTP backend in gvfs.
Impact
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 packages
This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.
Weakness classification
References
- NVD record
- CVE.org record
- https://access.redhat.com/errata/RHSA-2026:73997
- https://access.redhat.com/errata/RHSA-2026:73998
- https://access.redhat.com/errata/RHSA-2026:74370
- https://access.redhat.com/errata/RHSA-2026:85939
- https://access.redhat.com/errata/RHSA-2026:85940
- https://access.redhat.com/errata/RHSA-2026:85941
- https://access.redhat.com/errata/RHSA-2026:85942
- https://access.redhat.com/errata/RHSA-2026:85943
- https://access.redhat.com/errata/RHSA-2026:85944
- https://access.redhat.com/errata/RHSA-2026:85945
- https://access.redhat.com/errata/RHSA-2026:86606
- https://access.redhat.com/security/cve/CVE-2026-84268
- https://bugzilla.redhat.com/show_bug.cgi?id=2526485
- https://gitlab.gnome.org/GNOME/gvfs/-/issues/862