CVE-2026-73860

Description

CRIU is a checkpoint and restore tool for Linux. Prior to 4.2.1, CRIU injects a syscall;int3 sequence at the start of the first executable virtual memory area and resumes the target process to execute parasite code. Malicious code in the target process can keep an rseq critical section armed over that injection point so the kernel's restartable-sequence abort redirects execution to an attacker-controlled callback when CRIU resumes the process. In container snapshot environments, the hijacked parasite runs with seccomp disabled and a relaxed AppArmor profile and supplies trusted data to the privileged CRIU process, which can enable higher-privilege code execution. This issue is fixed in version 4.2.1.

References

https://github.com/checkpoint-restore/criu/security/advisories/GHSA-fvqj-jvxf-x3wp

https://github.com/checkpoint-restore/criu/releases/tag/v4.2.1

https://github.com/checkpoint-restore/criu/pull/3098

https://github.com/checkpoint-restore/criu/commit/f7dafedda5075fd6509bda67fbce1622e0c87a27

https://github.com/checkpoint-restore/criu/commit/c34355a7c31494a8be65b32b4410a7539f6c2442

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-118481

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS