Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: ngbe: fix NULL pointer dereference in non-MSI-X interrupt enabling In non-MSI-X mode (such as legacy INTx or single MSI), wx->msix_entry is not allocated or initialized. Calling NGBE_INTR_MISC(wx) dereferences wx->msix_entry->entry, leading to a NULL pointer dereference crash. This issue was introduced by fixing the IRQ vector when the number of VFs is 7. Fix the issue by explicitly checking `pdev->msix_enabled` to determine the correct vector index. Additionally, as a side fix, set the interrupt mask to BIT(0) for the non-MSI-X fallback. In MSI/INTx mode, the MISC and queue interrupts share vector 0, and the WX_PX_MISC_IVAR register is only valid in the MSI-X case. Thus, BIT(0) is the correct mask for the miscellaneous cause when MSI-X is disabled.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4174c0c331a2aa3322d3b3be532808deb041b37d before cef4c5b9aca24651d069adf9462b221df6a2a669; affected 4174c0c331a2aa3322d3b3be532808deb041b37d before 0ab482b2195edc000262f0eae1cdcb416b8f335d; affected 4174c0c331a2aa3322d3b3be532808deb041b37d before 5f3a13e0bb5ebcc1ca2dfda42ea40b9f3c2be6ea |
| Linux / Linux | affected 6.16; unaffected 0 before 6.16; unaffected 6.18.46 through 6.18.*; unaffected 7.1.10 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.