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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

Quick assessment

Affected
lxc incus
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在版本 6.0.7 之前的 Incus、6.1.0 至 7.0.2 之前的版本，以及 7.1.0 至 7.5.0 之前的版本中，存在一个任意文件写入漏洞。该漏洞允许恶意的迁移源通过在传输的卷中植入符号链接，从而向宿主机写入文件。攻击者可构造包含指向宿主机根目录的符号链接（例如将 链接至宿主机根目录）的 rsync 或 btrfs 接收流，以 root 权限写入文件，进而导致宿主机被完全接管。

CVSS 9.9 · Critical

Affected Version Matrix 6

VendorProduct Version RangeStatus
lxc incus < 6.0.7 affected
6.0.7 unaffected
6.1.0< 7.0.2 affected
7.0.2 unaffected
7.1.0< 7.5.0 affected
7.5.0 unaffected
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I. Basic Information for CVE-2026-115377

Vulnerability Information
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Vulnerability Title
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
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
lxc incus 0 ~ 6.0.7 -

II. Public POCs for CVE-2026-115377

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III. Intelligence Information for CVE-2026-115377

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Vendor Advisories for CVE-2026-115377 (1)

Vendor Pages for CVE-2026-115377 (1)

Same Patch Batch · lxc · 2026-10-22 · 9 CVEs total

CVE-2026-115375 9.9 CRITICAL Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 Path Traversal via Instance Backup Depende
CVE-2026-115372 8.5 HIGH Incus 7.3.0 before 7.5.0 Project Restriction Bypass via block.create_options
CVE-2026-115376 7.7 HIGH Incus 7.0.1 before 7.0.2 and 7.2.0 before 7.5.0 Project Restriction Bypass via Custom Volu
CVE-2026-115374 7.1 HIGH Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 Unsigned Header Bypass in Presigned S3 Upl
CVE-2026-115371 7.1 HIGH LXC Incus 6.0.3 before 6.0.7, 6.6.0 before 7.0.2, and 7.1.0 before 7.5.0 Bucket Credential
CVE-2026-115373 6.3 MEDIUM Incus before 6.0.7, 6.1.0 before 7.0.2, and 7.1.0 before 7.5.0 Authorization Bypass via GE
CVE-2026-115378 5.8 MEDIUM Incus before 6.0.7, 6.1.0 before 7.0.2, and 7.1.0 before 7.5.0 Arbitrary File Write via Re
CVE-2026-115370 4.3 MEDIUM Incus 6.0.5 before 6.0.7, 6.12.0 before 7.0.2, and 7.1.0 before 7.5.0 Restricted Project B

IV. Related Vulnerabilities

Same product: incus
Same vendor: lxc
Same weakness: CWE-59

V. Comments for CVE-2026-115377

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