CVE-2026-74741

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling<br /> <br /> In non-MSI-X mode (such as legacy INTx or single MSI), wx-&gt;msix_entry is<br /> not allocated or initialized. Calling NGBE_INTR_MISC(wx) dereferences<br /> wx-&gt;msix_entry-&gt;entry, leading to a NULL pointer dereference crash.<br /> <br /> This issue was introduced by fixing the IRQ vector when the number of<br /> VFs is 7. Fix the issue by explicitly checking `pdev-&gt;msix_enabled` to<br /> determine the correct vector index.<br /> <br /> Additionally, as a side fix, set the interrupt mask to BIT(0) for the<br /> non-MSI-X fallback. In MSI/INTx mode, the MISC and queue interrupts<br /> share vector 0, and the WX_PX_MISC_IVAR register is only valid in the<br /> MSI-X case. Thus, BIT(0) is the correct mask for the miscellaneous cause<br /> when MSI-X is disabled.