CVE-2025-21758

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

27/02/2025

Last modified:

03/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: add RCU protection to mld_newpack() mld_newpack() can be called without RTNL or RCU being held. Note that we no longer can use sock_alloc_send_skb() because ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep. Instead use alloc_skb() and charge the net->ipv6.igmp_sk socket under RCU protection.

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::::::::	2.6.26 (including)	5.15.179 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.129 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (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

CVE-2025-21758

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools