CVE-2025-21758

Published: February 28, 2025Last modified: February 28, 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.

Status

References

• https://git.kernel.org/stable/c/1b91c597b0214b1b462eb627ec02658c944623f2
• https://git.kernel.org/stable/c/25195f9d5ffcc8079ad743a50c0409dbdc48d98a
• https://git.kernel.org/stable/c/29fa42197f26a97cde29fa8c40beddf44ea5c8f3
• https://git.kernel.org/stable/c/a527750d877fd334de87eef81f1cb5f0f0ca3373
• https://git.kernel.org/stable/c/d60d493b0e65647e0335e6a7c4547abcea7df8e9
• https://git.kernel.org/stable/c/e8af3632a7f2da83e27b083f787bced1faba00b1