ALPINE-CVE-2026-78409
- Source
- https://security.alpinelinux.org/vuln/CVE-2026-78409
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-78409.json
- JSON Data
- https://api.osv.dev/v1/vulns/ALPINE-CVE-2026-78409
- Upstream
- Published
- 2026-09-02T16:17:23.833Z
- Modified
- 2026-09-05T00:30:02.661275464Z
- Severity
-
- 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
The X-mount.subdir option uses a detached-tree fast path on Linux 6.15 and later and passes the configured subdirectory to opentree() with ATSYMLINK_NOFOLLOW. That flag does not stop intermediate symlink traversal or keep resolution inside the newly mounted filesystem. A local unprivileged user with an fstab-authorized X-mount.subdir entry can attach a host path at the intended mountpoint.
- References