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CVE-2026-8933 is a local privilege escalation vulnerability in snap-confine, the snapd component responsible for constructing the execution environment for snap applications. The issue affects deployments where snap-confine is installed with Linux file capabilities instead of the traditional setuid-root model. In the vulnerable configuration, snap-confine executes with the calling user’s effective UID while retaining powerful capabilities, creating a privilege-boundary mismatch during sandbox initialization. This causes files and directories created during setup to be briefly owned or controllable by the unprivileged user before ownership is corrected, exposing exploitable race windows. Reported exploitation paths abuse these time-of-check/time-of-use conditions during temporary directory and file creation, including symlink-assisted redirection of privileged file writes and subsequent placement of attacker-controlled rules in a location later processed by a root-run service. Successful exploitation allows arbitrary command execution as root.
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No public exploit code observed for this vulnerability.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A local privilege escalation vulnerability in Ubuntu's snap-confine affecting set-capabilities builds, allowing a normal local user to gain full root privileges via a race condition involving file creation and redirection.
A high-severity local privilege escalation vulnerability in Ubuntu snapd affecting Ubuntu LTS releases back to 22.04.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.