HIGH: CVE-2022-0492 actively exploited — linux linux kernel

CVE: CVE-2022-0492

CVSS: 7.8 (3.1) — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: HIGH

Status: ✅ Confirmed exploited in the wild (CISA KEV)

Affected

• linux linux kernel
• debian debian linux
• redhat codeready linux builder
• redhat codeready linux builder for power little endian
• redhat virtualization host

Summary

A vulnerability was found in the Linux kernel’s cgroup_release_agent_write in the kernel/cgroup/cgroup-v1.c function. This flaw, under certain circumstances, allows the use of the cgroups v1 release_agent feature to escalate privileges and bypass the namespace isolation unexpectedly.

Verified Sources

• NVD entry
• GitHub Advisory
• MITRE
• CISA Known Exploited Vulnerabilities Catalog

References

• http://packetstormsecurity.com/files/166444/Kernel-Live-Patch-Security-Notice-LSN-0085-1.html
• http://packetstormsecurity.com/files/167386/Kernel-Live-Patch-Security-Notice-LSN-0086-1.html
• http://packetstormsecurity.com/files/176099/Docker-cgroups-Container-Escape.html
• https://bugzilla.redhat.com/show_bug.cgi?id=2051505
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=24f6008564183aa120d07c03d9289519c2fe02af
• https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html
• https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
• https://security.netapp.com/advisory/ntap-20220419-0002/
• https://www.debian.org/security/2022/dsa-5095
• https://www.debian.org/security/2022/dsa-5096

_Validated by the Lyrie Threat Intelligence Pipeline — 3 independent sources confirmed before publication. No speculation._