VDB
DEBIAN-CVE-2025-21759
DEBIAN-CVE-2025-21759
PUBLISHED
CVSS 7.800000190734863 HIGH
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: extend RCU protection in igmp6_send() igmp6_send() can be called without RTNL or RCU being held. Extend RCU protection so that we can safely fetch the net pointer and avoid a potential UAF. 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.
Risk Scores
CVSS v3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | linux | 6.18.10-1, 6.1.90-1, 6.1.90-1 |
| Debian:13 | linux | 0, 0 |
| Debian:14 | linux | 0, 0 |
| Debian:11 | linux | 6.1.139-1, 6.1.140-1, 6.1.147-1 |
Timeline
- Feb 27, 2025 CVE Published
- Apr 28, 2026 CVE Updated