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

Received

Published 22-10-2026Last modified 22-10-2026

Vulnerability summary

CVE-2026-115377 is a critical (CVSS 9.9) Link Following vulnerability in lxc incus.

Overall risk

70/100

0100

High · default modelHow is this calculated?

CVSS score

9.9/10

010

Critical · v3.1 (CVE.org)

EPSS scoreNot scoredRisk metrics not yet published.

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Timeline

22-10-2026
PublishedVulnerability first disclosed.

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.

CVSS metrics

4 scores · 2 sources · 2 versions

v4.09.4v3.19.9

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-59Improper Link Resolution Before File Access ('Link Following')The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected systems

Lxc1 product

incus< 6.0.7 | ≥ 6.1.0, < 7.0.2 | ≥ 7.1.0, < 7.5.0

1 vendor · 1 product

References

2 links

github.com/lxc/incus/security/advisories/GHSA-579w-c4rw-c8q3Vendor Advisory
www.vulncheck.com/advisories/…Third Party Advisory