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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

9.4 CriticalFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.40%Unchanged since Oct 23, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.4

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

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.

Record
CVE-2026-115377
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS 3.1
9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-59
Updated
2026-11-02
EUVDEUVD-2026-108300 9.4

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.

Record
EUVD-2026-108300
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-9c3h-632w-7845 9.4

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...

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.

Record
GHSA-9c3h-632w-7845
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-59
Updated
2026-11-02
NVD 9.4

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.

Record
CVE-2026-115377
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-59
Updated
2026-11-02
OSV 9.4

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

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.

Record
CVE-2026-115377
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Weakness
CWE-59
Updated
2026-11-02
OSVDEBIAN-CVE-2026-115377 9.4

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.

Record
DEBIAN-CVE-2026-115377
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
OSVUBUNTU-CVE-2026-115377 9.4

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.

Record
UBUNTU-CVE-2026-115377
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS 3.1
9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
incus
Debian:13
before 6.0.4-2+deb13u11, plus listed versions
6.0.4-26.0.4-2+deb13u16.0.4-2+deb13u106.0.4-2+deb13u1~bpo12+16.0.4-2+deb13u2
Show 13 moreShow less
6.0.4-2+deb13u2~bpo12+16.0.4-2+deb13u36.0.4-2+deb13u3~bpo12+16.0.4-2+deb13u46.0.4-2+deb13u4~bpo12+16.0.4-2+deb13u56.0.4-2+deb13u5~bpo12+16.0.4-2+deb13u66.0.4-2+deb13u6~bpo12+16.0.4-2+deb13u76.0.4-2+deb13u7~bpo12+16.0.4-2+deb13u86.0.4-2+deb13u9
6.0.4-2+deb13u11
incus
Debian:14
before 7.0.1-5, plus listed versions
6.0.4-26.0.4-36.0.5-16.0.5-26.0.5-3
Show 32 moreShow less
6.0.5-46.0.5-56.0.5-66.0.5-76.0.5-86.0.6-16.0.6-26.0.6-36.14.0-1~exp16.15.0-1~exp16.16.0-1~exp16.17.0-1~exp16.20.0-1~exp16.21.0-1~exp16.22.0-1~exp16.23.0-1~exp17.0.0-17.0.0-1~bpo13+17.0.0-27.0.0-2~bpo13+17.0.0-37.0.0-47.0.0-57.0.0-5~bpo13+17.0.1-17.0.1-1~bpo13+17.0.1-27.0.1-2~bpo13+17.0.1-37.0.1-3~bpo13+17.0.1-47.0.1-5~bpo13+1
7.0.1-5
incus
Ubuntu:Pro:24.04:LTS
All versions, plus listed versions
0.4-1ubuntu10.5.1-10.5.1-30.6-16.0.0-1
Show 7 moreShow less
6.0.0-1ubuntu0.16.0.0-1ubuntu0.26.0.0-1ubuntu0.2+esm16.0.0-1ubuntu0.36.0.0-1ubuntu0.3+esm16.0.0-1ubuntu0.3+esm26.0.0-1ubuntu0.3+esm3
None known
incus
Ubuntu:26.10
All versions, plus listed versions
6.0.5-87.0.1-5
None known
incus
Ubuntu:Pro:26.04:LTS
All versions, plus listed versions
6.0.4-26.0.5-86.0.5-8ubuntu0.26.04.1~esm1
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-115377 is a critical vulnerability (CVSS 9.4) in Lxc Incus, published October 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.40%, the 34th percentile. Fixed in incus 6.0.4-2+deb13u11.

References

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