Bug 2559251 (CVE-2026-115377)

Summary: CVE-2026-115377 incus: 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
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: urgent Docs Contact:
Priority: urgent    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Incus. An attacker controlling a malicious migration source can exploit an arbitrary file write vulnerability by embedding symbolic links (symlinks) into transferred storage volumes during migration streams. By directing these links to the underlying host filesystem, the attacker can overwrite critical system files with root privileges, potentially resulting in full host compromise.
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Description OSIDB Bzimport 2026-10-22 19:37:48 UTC 
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.