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TI-2026-79462 Aliases CVE-2026-115377GHSA-9c3h-632w-7845

Arbitrary file write via symlink in Incus migration stream

Priority MEDIUM 43CWE-59Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Incus versions before 6.0.7, from 6.1.0 before 7.0.2, and from 7.1.0 before 7.5.0 are affected by an arbitrary file write flaw caused by link following (CWE-59). A malicious migration source can plant a symlink in a transferred volume, so later writes follow it to files on the host. An attacker who controls a migration source can write files as root on the host, which leads to full host compromise.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00405 35th percentileScored 2026-11-07
Fix Fixed incus (lxc): 6.0.7, 7.0.2, 7.5.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
lxcincusbefore 6.0.7; 6.1.0 to before 7.0.2; 7.1.0 to before 7.5.06.0.7, 7.0.2, 7.5.0Patch availableCNA
  • incus Vendorlxc Affected before 6.0.7; 6.1.0 to before 7.0.2; 7.1.0 to before 7.5.0 Fixed in 6.0.7, 7.0.2, 7.5.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:linuxcontainers:incus:*:*:*:*:*:*:*:*——lxc
  • cpe:2.3:a:linuxcontainers:incus:*:*:*:*:*:*:*:* Versions — — ·lxc

Remediation

Upgrade Incus to version 6.0.7, 7.0.2, or 7.5.0.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

  • Fix · CNA incus (lxc) Fixed in 6.0.7, 7.0.2, 7.5.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    lxc incus 6.0.7, 7.0.2, 7.5.0

    5 records Highest priority Priority MEDIUM 2 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-79458 Missing authorization in Incus exposes operations across projectsPriority MEDIUM 64
    • TI-2026-79456 Improper authorization in LXC Incus exposes storage bucket credentialsPriority LOW 31
    • TI-2026-79463 Arbitrary file write in Incus via recursive file pullPriority LOW 30
    Show all 5 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-22 Threatist record created from CVE-2026-115377
  2. 2026-10-22 Alias added: GHSA-9c3h-632w-7845
  3. 2026-10-29 CISA SSVC decision points changed
  4. 2026-10-30 Affected versions changed · Red Hat
  5. 2026-10-30 CVSS score added · Red Hat

References

Advisory 1

  • TI-2019-04061 runc through 1.0-rc6, as used in Docker before 18.09.2 and other products, allows… CVSS 3.1HIGH 8.6
  • TI-2026-45063 Incus vulnerable to root RCE via image backup.yaml symlink CVSS 3.1CRITICAL 9.9
  • TI-2026-44978 Incus: Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge CVSS 3.1CRITICAL 9.9
  • TI-2026-36039 Incus has an arbitrary file write on its client due to trusted image hash CVSS 3.1CRITICAL 9.9
  • TI-2026-36024 Incus has an arbitrary file write via path traversal in S3 multipart upload CVSS 3.1CRITICAL 9.9
  • TI-2026-36022 Incus has a restricted project bypass leading to arbitrary command execution CVSS 3.1CRITICAL 9.9
See all 63 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences