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In the Linux kernel, the following vulnerability has been resolved:
ping: Fix potentail NULL deref for /proc/net/icmp.
After commit dbca1596bbb0 ("ping: convert to RCU lookups, get rid of rwlock"), we use RCU for ping sockets, but we should use spinlock for /proc/net/icmp to avoid a potential NULL deref mentioned in the previous patch.
Let's go back to using spinlock there.
Note we can convert ping sockets to use hlist instead of hlist_nulls because we do not use SLAB_TYPESAFE_BY_RCU for ping sockets.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-debuginfo-common-x86_64Upgrade kernel-toolsUpgrade perf-debuginfoUpgrade kernel-headersUpgrade kernel-libbpf-develUpgrade kernelUpgrade kernel-livepatch-6.1.25-37.47Upgrade kernel-tools-develUpgrade python3-perf-debuginfoUpgrade kernel-develUpgrade perfUpgrade kernel-libbpfUpgrade bpftool-debuginfoUpgrade kernel-libbpf-staticUpgrade bpftoolUpgrade kernel-debuginfo-common-aarch64Upgrade python3-perfUpgrade kernel-debuginfoUpgrade kernel-tools-debuginfo | Feb 20, 2026 | Dec 24, 2025 |
| Debian | — | Upgrade linux | Dec 29, 2025 | Dec 29, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 24, 2025 |
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