CVE-2025-21759 (GCVE-0-2025-21759)
Vulnerability from cvelistv5
Published
2025-02-27 02:18
Modified
2025-05-04 07:20
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551
Version: b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551
Version: b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551
Version: b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551
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