PT-2025-25896 · Linux+2 · Linux Kernel+2

Published 2023-05-09 · Updated 2025-06-19 · CVE-2022-49970

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to the fixed version

Description A kernel BUG has been resolved in the Linux kernel, specifically in the bpf and cgroup components. The issue was reported by Syzkaller and occurs when a kernel BUG is triggered due to an invalid opcode. The problem arises when a cgroup has an attached program and the purge effective progs function is called, causing the iteration to skip subsequent operations and resulting in a NULL cgroup. This issue can be triggered by attaching a program to a cgroup, writing to /proc/thread-self/fail-nth, and then detaching the program.

Recommendations To resolve this issue, update to a version of the Linux kernel that includes the fix for the kernel BUG in purge effective progs. As a temporary workaround, consider avoiding the use of the purge effective progs function or restricting access to the affected cgroup components until a patch is available.

Exploit

Fix

Related Identifiers

CVE-2022-49970

RHSA-2023:2458

RHSA-2023_2458

Affected Products

Astra Linux

Linux Kernel

Red Hat

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49970.json · Exploit
• https://git.kernel.org/stable/c/222bd95c89b135fde21f0bd0cb5cc1611c0c576c · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49970 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-49970 · Vendor Advisory
• https://git.kernel.org/stable/c/c5f975e3ebfa57be13393c585a4b58ea707023cb · Patch
• https://git.kernel.org/stable/c/a1a05d3ae58299b040da4d5b27e72e81c2132e0b · Patch
• https://cve.org/CVERecord?id=CVE-2022-49970 · Security Note
• https://git.kernel.org/stable/c/7d6620f107bae6ed687ff07668e8e8f855487aa9 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49970 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-49970 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49970 · Security Note
• https://osv.dev/vulnerability/CVE-2022-49970 · Vendor Advisory
• https://twitter.com/CVEnew/status/1935727361426665603 · Twitter Post
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://lore.kernel.org/linux-cve-announce/2025061817-CVE-2022-49970-2d63@gregkh/T · Note