CVE-2025-21759 | 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 unde
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.
- 🔗 git.kernel.org/stable/c/638e8fe3563a82f298fe537a28d5342a…
- 🔗 git.kernel.org/stable/c/6901bbb169e3add6c037218d996790ce…
- 🔗 git.kernel.org/stable/c/7e0a818ecc4d62e7fb668ea02de0bfe8…
- 🔗 git.kernel.org/stable/c/81b25a07ebf53f9ef4ca8f3d96a8ddb9…
- 🔗 git.kernel.org/stable/c/0bf8e2f3768629d437a32cb824149e6e…
- 🔗 git.kernel.org/stable/c/8e92d6a413feaf968a33f0b439ecf274…
- 🔗 git.kernel.org/stable/c/087c1faa594fa07a66933d750c0b2610…
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CVE-2025-21759 | 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 unde
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 p
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