Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2025-21759

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
27/02/2025
Last modified:
24/03/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ipv6: mcast: extend RCU protection in igmp6_send()<br /> <br /> igmp6_send() can be called without RTNL or RCU being held.<br /> <br /> Extend RCU protection so that we can safely fetch the net pointer<br /> and avoid a potential UAF.<br /> <br /> Note that we no longer can use sock_alloc_send_skb() because<br /> ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep.<br /> <br /> Instead use alloc_skb() and charge the net-&gt;ipv6.igmp_sk<br /> socket under RCU protection.

Impact

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

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 2.6.26 (including) 6.6.79 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.12.16 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.13.4 (excluding)
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools