CVE-2026-115377

Incus before 6.0.7, 6.1.0 before 7.0.2, and 7.1.0 before 7.5.0 Arbitrary File Write via Symlink in Migration Stream

State: Published
Severity: 9.4 Critical
Published: Oct 22, 2026
Updated: Oct 29, 2026
Reserved: Oct 22, 2026

Description

Incus before 6.0.7, 6.1.0 before 7.0.2, and 7.1.0 before 7.5.0 contains an arbitrary file write vulnerability that allows malicious migration sources to write host files by planting symlinks in transferred volumes. Attackers can craft rsync or btrfs receive streams with a symlink such as rootfs pointing to the host root, writing files as root for full host compromise.

Scores

CVSS	Score	Vector	Source
4.0	9.4 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	VulnCheck
3.1	9.9 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	VulnCheck

Weaknesses

CWE-59 Improper Link Resolution Before File Access ('Link Following')

Affected Products

Product	Versions
incuslxc	before 6.0.7Affected 6.0.7Not affected 6.1.0 to before 7.0.2Affected 7.0.2Not affected 7.1.0 to before 7.5.0Affected 7.5.0Not affected

References

GitHub Security Advisory (GHSA-579w-c4rw-c8q3)vendor-advisory
VulnCheck Advisory: Incus before 6.0.7, 6.1.0 before 7.0.2, and 7.1.0 before 7.5.0 Arbitrary File Write via Symlink in Migration Streamthird-party-advisory

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