CVEvulnerability

CVE-2025-21758

5.5 MEDIUM Published 2025-02-27 Modified 2026-10-15 Official page ↗
Status
Modified
Published
2025-02-27
Last modified
2026-10-15
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Affected configurations

• linux linux kernel (>= 2.6.26 < 5.15.179) • linux linux kernel (>= 5.16 < 6.1.129) • linux linux kernel (>= 6.2 < 6.6.79) • linux linux kernel (>= 6.7 < 6.12.16) • linux linux kernel (>= 6.13 < 6.13.4) • linux linux kernel 6.14

References