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In the Linux kernel, the following vulnerability has been resolved:
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL
An LWT_SEG6LOCAL program can invalidate its cached SRH with bpf_lwt_seg6_adjust_srh() and then call bpf_skb_pull_data(). The latter may reallocate skb->head, leaving the per-CPU SRH pointer dangling. Post-program SRH validation then writes through that pointer.
Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL programs so the verifier rejects this unsafe helper combination. Other LWT program types continue to expose the helper through lwt_out_func_proto().
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.18-toolsUpgrade perf6.18Upgrade kernel6.18Upgrade python3-perf6.18-debuginfoUpgrade microvm-kernel6.18Upgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel6.18-tools-debuginfoUpgrade kernel6.18-tools-develUpgrade kernel6.18-modules-extraUpgrade kernel6.18-develUpgrade bpftool6.18Upgrade python3-perf6.18Upgrade kernel6.18-modules-extra-commonUpgrade kernel6.18-headersUpgrade kernel6.18-debuginfoUpgrade kernel6.18-debuginfo-common-aarch64Upgrade bpftool6.18-debuginfoUpgrade kernel-livepatch-6.18.56-125.164Upgrade perf6.18-debuginfo | Oct 28, 2026 | Oct 9, 2026 |
| Debian | — | Upgrade linux-6.12Upgrade linux | Oct 20, 2026 | Oct 9, 2026 |
| Redhat_linux | — | No solution exists | Oct 13, 2026 | Oct 9, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2026 | Oct 9, 2026 |
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