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CVE-2025-52881 is an improper link-resolution flaw in runc versions 1.2.7, 1.3.2, and 1.4.0-rc.2. A locally positioned attacker can race containers configured with shared mounts so that runc writes intended for /proc are redirected to other procfs files. Symbolic links in tmpfs can provide the redirection mechanism, and bind mounts may also be usable. The flaw can be triggered through parallel container execution, including Docker Buildx builds using a standard Dockerfile. Earlier validation of LSM-label writes only confirmed that the destination was a procfs file and did not prevent redirection to an unintended procfs target.
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No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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100 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity runc vulnerability enabling an attacker to redirect runc writes intended for /proc via a racing container and shared mounts, potentially compromising confidentiality, integrity, and availability.
A high-severity runc container-runtime race condition that can redirect writes to unintended procfs files via shared mounts and symlink or bind-mount techniques, potentially compromising confidentiality, integrity, and availability.
A runc/opencontainers-selinux vulnerability that can lead to container escape and denial of service through arbitrary write gadgets and procfs write redirects.
A runc/opencontainers-selinux vulnerability that can enable container escape and denial of service through arbitrary write gadgets and procfs write redirects.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.