PT-2025-53935 · Linux+1 · Linux Kernel+1

Published 2022-10-18 · Updated 2026-01-01 · CVE-2022-50817

Positive Technologies (AI Summary)

CVSS v2.0

4.9

Medium

Base vector

AV:L/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.0.0-syzkaller-02734-g0326074ff465

Description The Linux kernel contained a flaw within the networking component, specifically in the hsr (High Speed Resilient) functionality. A null dereference issue was identified in the skb clone() function, triggered by a bug in hsr get untagged frame(). If create stripped skb hsr() returns NULL, the code incorrectly attempts to call skb clone(), leading to a general protection fault. This issue was discovered through fuzzing with syzbot. The skb clone() function is responsible for creating a copy of a socket buffer (sk buff), and a null pointer dereference in this function can lead to system instability or a crash. The hsr get untagged frame() function is involved in processing frames within the HSR forwarding process.

Recommendations Update to version 6.0.0-syzkaller-02734-g0326074ff465 or a later version to address this issue.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2026-02412

CVE-2022-50817

RHSA-2023:6583

Affected Products

Linux Kernel

Red Hat

References · 21

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50817.json · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-50817 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-50817 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-02412 · Security Note
• https://ubuntu.com/security/CVE-2022-50817 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-50817 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-50817 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-50817 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2022-50817 · Vendor Advisory
• https://git.kernel.org/stable/c/c46f2e0fcd1ecfc6046e5cf785ff89f0572f94e4 · Note
• https://twitter.com/CVEnew/status/2006861530818556218 · Twitter Post
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://access.redhat.com/security/cve/cve-2022-50817 · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.152 · Note
• https://git.kernel.org/stable/c/35ece858660eae13ee0242496a1956c39d29418e · Note