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CVE-2026-8933 is a high-severity local privilege-escalation vulnerability in snap-confine, the snapd helper that constructs execution sandboxes for Snap applications. It affects snap-confine deployments using file capabilities rather than the conventional setuid-root configuration. During sandbox initialization, snap-confine creates temporary resources while executing with the invoking user's effective UID but retaining powerful Linux capabilities. Race windows before ownership changes permit an attacker to manipulate those resources. Privileged file creation follows attacker-controlled symbolic links because the relevant open operation lacks no-follow protection, while a separate race permits permissions to be widened before ownership is transferred. An attacker can combine these conditions with a FUSE mount to retain access across namespace setup and create a privileged udev rule that systemd-udevd executes as root. Setuid-root snap-confine installations are not affected.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
87 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity local privilege escalation vulnerability in snap-confine caused by a race condition during sandbox initialization, allowing an unprivileged local user to manipulate temporary directories and gain root code execution.
An Execution with Unnecessary Privileges vulnerability in Ubuntu snapd affecting multiple Ubuntu LTS releases.
A local privilege escalation vulnerability in Ubuntu's snap-confine caused by a race condition in temporary directory and file handling, allowing a local user on certain capability-configured desktop installations to create arbitrary files and escalate to root.
A snap-confine local privilege escalation flaw in Ubuntu Desktop involving two race conditions that allow a local user to gain root on default installs.
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.