In the Linux kernel, the following vulnerability has been resolved:
nexthop: Initialize extack in remove_nh_grp_entry()
remove_nh_grp_entry() prints the extack message when a listener fails to replace the reduced nexthop group. However, extack is not initialized and listeners are not required to set a message when returning an error. Neither netdevsim nor mlxsw do so when an allocation fails, resulting in the dereference of an uninitialized stack pointer.
Fix by zero-initializing extack, as was done in commit 6347c5314cee ("nexthop: initialize extack in nh_res_bucket_migrate()").
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.12Upgrade kernel6.12-debuginfoUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-modules-extraUpgrade bpftool6.12-debuginfoUpgrade kernel6.12-toolsUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-modules-extra-commonUpgrade perf6.12Upgrade python3-perf6.12Upgrade bpftool6.12Upgrade kernel6.12-tools-develUpgrade perf6.12-debuginfoUpgrade kernel6.12-tools-debuginfoUpgrade kernel6.12-headersUpgrade kernel6.12-develUpgrade kernel-livepatch-6.12.111-136.204Upgrade python3-perf6.12-debuginfo | Oct 13, 2026 | Sep 25, 2026 |
| Debian | — | Upgrade linuxUpgrade linux-6.12 | Sep 30, 2026 | Sep 25, 2026 |
| Redhat_linux | — | No solution exists | Sep 30, 2026 | Sep 25, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2026 | Sep 25, 2026 |
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