In the Linux kernel, the following vulnerability has been resolved:
igc: remove napi_synchronize() in igc_down()
When an AF_XDP zero-copy application is killed abruptly, the XSK pool is torn down but NAPI keeps polling. igc_clean_rx_irq_zc() then returns the full budget on every poll, so napi_complete_done() never clears NAPI_STATE_SCHED.
igc_down() calls napi_synchronize() before napi_disable(), so it spins forever waiting for that bit and the interface never goes down. Drop the napi_synchronize() and let napi_disable() do the job -- it sets NAPI_STATE_DISABLE, which forces the stuck poll to complete. Reorder it ahead of igc_set_queue_napi() so the NAPI mapping is cleared only after polling has stopped, matching the recent igb fix b1e067240379.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.18-modules-extra-commonUpgrade kernel6.18-debuginfo-common-aarch64Upgrade bpftool6.18Upgrade kernel-livepatch-6.18.44-99.149Upgrade perf6.18-debuginfoUpgrade bpftool6.18-debuginfoUpgrade python3-perf6.18-debuginfoUpgrade kernel6.18-tools-debuginfoUpgrade kernel6.18-debuginfoUpgrade kernel6.18Upgrade kernel6.18-toolsUpgrade kernel6.18-debuginfo-common-x86_64Upgrade python3-perf6.18Upgrade kernel6.18-develUpgrade kernel6.18-modules-extraUpgrade microvm-kernel6.18Upgrade kernel6.18-tools-develUpgrade kernel6.18-headersUpgrade perf6.18 | Sep 30, 2026 | Aug 28, 2026 |
| Debian | — | Upgrade linuxUpgrade linux-6.12 | Aug 30, 2026 | Aug 30, 2026 |
| Redhat_linux | — | No solution exists | Sep 2, 2026 | Aug 28, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 15, 2026 | Aug 28, 2026 |
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