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.
Fix
Patch, vendor advisory and mitigation references on NVD 6
- https://git.kernel.org/stable/c/1b91c597b0214b1b462eb627ec02658c944623f2 Patch
- https://git.kernel.org/stable/c/25195f9d5ffcc8079ad743a50c0409dbdc48d98a Patch
- https://git.kernel.org/stable/c/29fa42197f26a97cde29fa8c40beddf44ea5c8f3 Patch
- https://git.kernel.org/stable/c/a527750d877fd334de87eef81f1cb5f0f0ca3373 Patch
- https://git.kernel.org/stable/c/d60d493b0e65647e0335e6a7c4547abcea7df8e9 Patch
- https://git.kernel.org/stable/c/e8af3632a7f2da83e27b083f787bced1faba00b1 Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.5 · linuxNVD modified 2026-10-15 02:17
Affected (CPE criteria) 3
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
References 11
- https://git.kernel.org/stable/c/1b91c597b0214b1b462eb627ec02658c944623f2 Patch
- https://git.kernel.org/stable/c/25195f9d5ffcc8079ad743a50c0409dbdc48d98a Patch
- https://git.kernel.org/stable/c/29fa42197f26a97cde29fa8c40beddf44ea5c8f3 Patch
- https://git.kernel.org/stable/c/a527750d877fd334de87eef81f1cb5f0f0ca3373 Patch
- https://git.kernel.org/stable/c/d60d493b0e65647e0335e6a7c4547abcea7df8e9 Patch
- https://git.kernel.org/stable/c/e8af3632a7f2da83e27b083f787bced1faba00b1 Patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html