What’s Vulnerable › Vulnerabilities

CVE-2026-98016: net/mlx5e: Fix use-after-free race in sample_restore_put()

• 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: 2026-09-25 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix use-after-free race in sample_restore_put() Concurrent teardown of TC sample rules sharing the same restore context may re-read restore->count after dropping restore_lock. At that point another thread may already have completed cleanup and freed the restore object. Use the result of the refcount decrement while holding restore_lock to determine whether cleanup is needed.

Affected products

• Linux kernel: 5.13 — 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/1daecd76ab9e5f055fe3970462410ad1d40bd177
• https://git.kernel.org/stable/c/308e1cbb0d9712081f90860fe839ccb47bc196ee
• https://git.kernel.org/stable/c/3efd1a1938cbb33c53b0d75e55b6c0fe2ebad79a
• https://git.kernel.org/stable/c/72324da8eeca269db9196c2a555abf72eb0385c5
• https://git.kernel.org/stable/c/8267e46d14e847e80e0aebe366d348e8a484a619
• https://git.kernel.org/stable/c/af3aef0245abbab5e9f6302e7a7d6407187afb71
• https://git.kernel.org/stable/c/cdf920e44cbbee1900c66f002fb50afee20977d4

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