# CVE-2026-84267: gvfs: A flaw was found in the SFTP backend in gvfs CVE-2026-84267 is fixed in 6 products on 1 platform, first by gvfs 1.48.2-0ubuntu1.3, released September 1, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-84267 - Priority: Routine - CVSS: 4.3 (medium) - EPSS: 0.0021 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 1, 2026 ## Description A flaw was found in the SFTP backend in gvfs. When mounting a share, a malicious SFTP server can cause read_string() to allocate a buffer with a certain length but the function does not verify that the buffer is completely filled, leaving the remainder of the buffer containing uninitialized heap contents. If the server sends a short FXP_HANDLE reply, these uninitialized bytes are taken as the file handle. The client will then echo these uninitialized bytes back to the server on all subsequent requests using that handle. With a length of 128 bytes, this issue allows the malicious server to deterministically read uninitialized heap memory from the gvfsd-sftp process, leaking its heap base and the load address of the libgio library, resulting in a deterministic defeat of Address Space Layout Randomization (ASLR). ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | gvfs Debian 14 | 1.62.0-1 | [DEBIAN-CVE-2026-84267](https://patchblox.com/security/data/fix/linux/debian-cve-2026-84267.md) | Sep 17, 2026 | | Linux | gvfs Ubuntu 22.04.1 LTS (jammy) | 1.48.2-0ubuntu1.3 | [gvfs 1.48.2-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gvfs-1.48.2-0ubuntu1.3.md) | Sep 1, 2026 | | Linux | gvfs Ubuntu 24.04.5 LTS (noble) | 1.54.4-0ubuntu1~24.04.5 | [gvfs 1.54.4-0ubuntu1~24.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gvfs-1.54.4-0ubuntu1-24.04.5.md) | Sep 1, 2026 | | Linux | gvfs Ubuntu 26.04.1 LTS (resolute) | 1.60.0-1ubuntu0.2 | [gvfs 1.60.0-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gvfs-1.60.0-1ubuntu0.2.md) | Sep 1, 2026 | | Linux | gvfs opensuse-leap 16.0 | 1.59.90-160000.3.1 | [OPENSUSE-SU-2026:21875-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21875-1.md) | Sep 18, 2026 | | Linux | gvfs sles 15.6 | 1.52.2-150600.3.9.1 | [SUSE-SU-2026:4240-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4240-1.md) | Sep 17, 2026 | | Linux | gvfs sles 15.7 | 1.52.2-150600.3.9.1 | [SUSE-SU-2026:4240-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4240-1.md) | Sep 17, 2026 | | Linux | gvfs-backends Ubuntu 22.04.1 LTS (jammy) | 1.48.2-0ubuntu1.3 | [gvfs-backends 1.48.2-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gvfs-backends-1.48.2-0ubuntu1.3.md) | Sep 1, 2026 | | Linux | gvfs-backends Ubuntu 24.04.5 LTS (noble) | 1.54.4-0ubuntu1~24.04.5 | [gvfs-backends 1.54.4-0ubuntu1~24.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gvfs-backends-1.54.4-0ubuntu1-24.04.5.md) | Sep 1, 2026 | | Linux | gvfs-backends Ubuntu 26.04.1 LTS (resolute) | 1.60.0-1ubuntu0.2 | [gvfs-backends 1.60.0-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gvfs-backends-1.60.0-1ubuntu0.2.md) | Sep 1, 2026 | | Linux | gvfs-common Ubuntu 22.04.1 LTS (jammy) | 1.48.2-0ubuntu1.3 | [gvfs-common 1.48.2-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gvfs-common-1.48.2-0ubuntu1.3.md) | Sep 1, 2026 | | Linux | gvfs-common Ubuntu 24.04.5 LTS (noble) | 1.54.4-0ubuntu1~24.04.5 | [gvfs-common 1.54.4-0ubuntu1~24.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gvfs-common-1.54.4-0ubuntu1-24.04.5.md) | Sep 1, 2026 | | Linux | gvfs-common Ubuntu 26.04.1 LTS (resolute) | 1.60.0-1ubuntu0.2 | [gvfs-common 1.60.0-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gvfs-common-1.60.0-1ubuntu0.2.md) | Sep 1, 2026 | | Linux | gvfs-daemons Ubuntu 22.04.1 LTS (jammy) | 1.48.2-0ubuntu1.3 | [gvfs-daemons 1.48.2-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gvfs-daemons-1.48.2-0ubuntu1.3.md) | Sep 1, 2026 | | Linux | gvfs-daemons Ubuntu 24.04.5 LTS (noble) | 1.54.4-0ubuntu1~24.04.5 | [gvfs-daemons 1.54.4-0ubuntu1~24.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gvfs-daemons-1.54.4-0ubuntu1-24.04.5.md) | Sep 1, 2026 | | Linux | gvfs-daemons Ubuntu 26.04.1 LTS (resolute) | 1.60.0-1ubuntu0.2 | [gvfs-daemons 1.60.0-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gvfs-daemons-1.60.0-1ubuntu0.2.md) | Sep 1, 2026 | | Linux | gvfs-fuse Ubuntu 22.04.1 LTS (jammy) | 1.48.2-0ubuntu1.3 | [gvfs-fuse 1.48.2-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gvfs-fuse-1.48.2-0ubuntu1.3.md) | Sep 1, 2026 | | Linux | gvfs-fuse Ubuntu 24.04.5 LTS (noble) | 1.54.4-0ubuntu1~24.04.5 | [gvfs-fuse 1.54.4-0ubuntu1~24.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gvfs-fuse-1.54.4-0ubuntu1-24.04.5.md) | Sep 1, 2026 | | Linux | gvfs-fuse Ubuntu 26.04.1 LTS (resolute) | 1.60.0-1ubuntu0.2 | [gvfs-fuse 1.60.0-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gvfs-fuse-1.60.0-1ubuntu0.2.md) | Sep 1, 2026 | | Linux | gvfs-libs Ubuntu 22.04.1 LTS (jammy) | 1.48.2-0ubuntu1.3 | [gvfs-libs 1.48.2-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gvfs-libs-1.48.2-0ubuntu1.3.md) | Sep 1, 2026 | | Linux | gvfs-libs Ubuntu 24.04.5 LTS (noble) | 1.54.4-0ubuntu1~24.04.5 | [gvfs-libs 1.54.4-0ubuntu1~24.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gvfs-libs-1.54.4-0ubuntu1-24.04.5.md) | Sep 1, 2026 | | Linux | gvfs-libs Ubuntu 26.04.1 LTS (resolute) | 1.60.0-1ubuntu0.2 | [gvfs-libs 1.60.0-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gvfs-libs-1.60.0-1ubuntu0.2.md) | Sep 1, 2026 | --- Data as of 2026-11-08T19:12:23Z UTC. 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