CVE Catalog

CVE-2026-74741

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.45%

37th percentile - higher than 37% of all known CVEs

Summary

In the Linux kernel, the ngbe driver has a NULL pointer dereference vulnerability when enabling interrupts in non-MSI-X mode. In such mode, wx->msix_entry is not allocated, and calling NGBE_INTR_MISC leads to a crash.

Risk Assessment

The vulnerability could be exploited to cause a system crash during interrupt configuration, threatening system availability.

Recommendation

Apply the kernel patch that checks pdev->msix_enabled before using wx->msix_entry, and update the ngbe driver.

Other vulnerabilities in Linux kernel

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Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS