EUVD-2026-18690
GHSA-w2hf-gr87-g9jg
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3Description
In the Linux kernel, the following vulnerability has been resolved: igc: fix page fault in XDP TX timestamps handling If an XDP application that requested TX timestamping is shutting down while the link of the interface in use is still up the following kernel splat is reported: [ 883.803618] [ T1554] BUG: unable to handle page fault for address: ffffcfb6200fd008 ... [ 883.803650] [ T1554] Call Trace: [ 883.803652] [ T1554] <TASK> [ 883.803654] [ T1554] igc_ptp_tx_tstamp_event+0xdf/0x160 [igc] [ 883.803660] [ T1554] igc_tsync_interrupt+0x2d5/0x300 [igc] ... During shutdown of the TX ring the xsk_meta pointers are left behind, so that the IRQ handler is trying to touch them. This issue is now being fixed by cleaning up the stale xsk meta data on TX shutdown. TX timestamps on other queues remain unaffected.
Analysis
Kernel page fault in Intel IGC network driver XDP TX timestamp handling allows local denial of service when an XDP application requesting TX timestamping shuts down while the interface link remains active. The vulnerability stems from stale xsk_meta pointers left in memory after TX ring shutdown, causing the IRQ handler to dereference invalid kernel addresses and trigger a kernel panic. …
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