What’s Vulnerable › Vulnerabilities

CVE-2026-98791: net/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference During XSK TX queue teardown, outstanding descriptors are completed without a CQE. If one requested a TX timestamp, the completion path passes that NULL CQE to mlx5e_xsk_fill_timestamp(), which dereferences it. Return zero when no CQE is available, indicating that teardown did not produce a TX timestamp.

Affected products

• Linux kernel: 6.8 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/63df0ef4c6e3105589e6bb2e758ce611b0ada86c
• https://git.kernel.org/stable/c/7b97273cbebe9dd4fddc457f0c4f2a124d0e3996
• https://git.kernel.org/stable/c/f81d40e2eb69552334f510114f3e6edd0d43178b
• https://git.kernel.org/stable/c/fce70b6bf9f3261e887419a4e7caa25b80fa9d55

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