Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2022-50266

Severity CVSS v4.0:
Pending analysis
Type:
CWE-476 NULL Pointer Dereference
Publication date:
15/09/2025
Last modified:
02/12/2025

Description

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

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.4.238 (including) 4.5 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.9.238 (including) 4.10 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.14.200 (including) 4.15 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.19.149 (including) 4.20 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.4.69 (including) 5.5 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.8.13 (including) 5.9 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.9.1 (including) 6.0.16 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.1 (including) 6.1.2 (excluding)
cpe:2.3:o:linux:linux_kernel:5.9:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.9:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.9:rc8:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools