Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2024-50260

Severity CVSS v4.0:
Pending analysis
Type:
CWE-476 NULL Pointer Dereference
Publication date:
09/11/2024
Last modified:
01/10/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> sock_map: fix a NULL pointer dereference in sock_map_link_update_prog()<br /> <br /> The following race condition could trigger a NULL pointer dereference:<br /> <br /> sock_map_link_detach(): sock_map_link_update_prog():<br /> mutex_lock(&amp;sockmap_mutex);<br /> ...<br /> sockmap_link-&gt;map = NULL;<br /> mutex_unlock(&amp;sockmap_mutex);<br /> mutex_lock(&amp;sockmap_mutex);<br /> ...<br /> sock_map_prog_link_lookup(sockmap_link-&gt;map);<br /> mutex_unlock(&amp;sockmap_mutex);<br /> <br /> <br /> Fix it by adding a NULL pointer check. In this specific case, it makes<br /> no sense to update a link which is being released.

Impact

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

Base Score: 4.70 MEDIUM
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x
4.70
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.10 (including) 6.11.7 (excluding)
cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools