CVE-2026-47766

unknown

EUVD alias: EUVD-2026-58714

Assigned by CNA: github_m

Published 2026-08-14 · Modified 2026-08-14

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CVSS v3

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CVSS v4 NEW

5.1

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

VIR risk

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Description

crun is an open source OCI Container Runtime fully written in C. Prior to version 1.28, crun's default device setup opens the container rootfs `/dev` directory without `O_NOFOLLOW`. If an OCI bundle contains `rootfs/dev` as a symlink and the bundle configuration does not mount `/dev`, crun follows that symlink and creates the default device nodes and stdio symlinks at the symlink target outside the container rootfs. In a local rootful crun replay, this created fixed device nodes and symlinks outside the rootfs before crun returned failure. A pre-existing file named `ptmx` in the target directory was also replaced by crun's forced `ptmx -> pts/ptmx` symlink. Version 1.28 fixes the issue.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Debian Security Tracker · View original ↗ · DFSG

CVE-2026-47766 NameCVE-2026-47766 SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) Vulnerable and fixed packages The table below lists information on source packages. Source PackageReleaseVersionStatus crun (PTS)bullseye0.17+dfsg-1+deb11u2vulnerable bookworm1.8.1-1+deb12u1vulnerable…

CVE-2026-47766

Name	CVE-2026-47766
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
crun (PTS)	bullseye	0.17+dfsg-1+deb11u2	vulnerable
	bookworm	1.8.1-1+deb12u1	vulnerable
	trixie	1.21-1	vulnerable
	forky	1.27.1-1	vulnerable
	sid	1.28-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
crun	source	(unstable)	1.28-1

Notes

[trixie] - crun <no-dsa> (Minor issue)
[bookworm] - crun <no-dsa> (Minor issue)
[bullseye] - crun <postponed> (Minor issue, can be fixed with next update)
https://github.com/containers/crun/security/advisories/GHSA-7vwr-4279-7gq5
https://github.com/containers/crun/commit/c6f338ac2e26e216ab7820b91863a0b84e608097 (1.28)

Home - Debian Security - Source (Git)

Apply commands

text fix

Notes

[trixie] - crun <no-dsa> (Minor issue)[bookworm] - crun <no-dsa> (Minor issue)[bullseye] - crun <postponed> (Minor issue, can be fixed with next update)https://github.com/containers/crun/security/advisories/GHSA-7vwr-4279-7gq5https://github.com/containers/crun/commit/c6f338ac2e26e216ab7820b91863a0b84e608097 (1.28)

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Mixed 5 releases

Version	Status	Fixed in
trixie	Affected	—
sid	Fixed	`1.28-1`
forky	Fixed	`1.28-1`
bullseye	Affected	—
bookworm	Affected	—

References

CWEs

CWE-61

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.