CVE-2022-50266

MEDIUM EPSS 4.0%
Published Sep 15, 20259mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 15, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: kprobes: Fix check for probe enabled in kill_kprobe() In kill_kprobe(), the check whether disarm_kprobe_ftrace() needs to be called always fails. This is because before that we set the KPROBE_FLAG_GONE flag for kprobe so that "!kprobe_disabled(p)" is always false. The disarm_kprobe_ftrace() call introduced by commit: 0cb2f1372baa ("kprobes: Fix NULL pointer dereference at kprobe_ftrace_handler") to fix the NULL pointer reference problem. When the probe is enabled, if we do not disarm it, this problem still exists. Fix it by putting the probe enabled check before setting the KPROBE_FLAG_GONE flag.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 11

VendorProductVersionRange
linuxlinux_kernel*≥4.4.238  –  <4.5
linuxlinux_kernel*≥4.9.238  –  <4.10
linuxlinux_kernel*≥4.14.200  –  <4.15
linuxlinux_kernel*≥4.19.149  –  <4.20
linuxlinux_kernel*≥5.4.69  –  <5.5
linuxlinux_kernel*≥5.8.13  –  <5.9
linuxlinux_kernel*≥5.9.1  –  <6.0.16
linuxlinux_kernel*≥6.1  –  <6.1.2
linuxlinux_kernel5.9any
linuxlinux_kernel5.9any
linuxlinux_kernel5.9any

References 3

  • git.kernel.org https://git.kernel.org/stable/c/0c76ef3f26d5ef2ac2c21b47e7620cff35809fbb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c909985dd0c0f74b61e3f8f0e04bf8aa9c8b97c7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f20a067f13106565816b4b6a6b665b2088a63824
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0c76ef3f26d5ef2ac2c21b47e7620cff35809fbb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c909985dd0c0f74b61e3f8f0e04bf8aa9c8b97c7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f20a067f13106565816b4b6a6b665b2088a63824
    Patch