What’s Vulnerable › Vulnerabilities

CVE-2026-98498: net/mlx5: Fix rev_entry reference leak in mlx5_tc_ct_shared_counter_get()

• 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/mlx5: Fix rev_entry reference leak in mlx5_tc_ct_shared_counter_get() When the reverse entry is found but its counter is already being released, refcount_inc_not_zero() fails and the reference taken by mlx5_tc_ct_entry_get() is never dropped before falling through to create_counter. Drop it so the reverse entry is not kept alive forever by a shared counter lookup that did not use it.

Affected products

• Linux kernel: 5.10 — 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/0bf6bb567f0edaa771e7dd208ef98da50e6a4485
• https://git.kernel.org/stable/c/1f13989a0704bd98cab09f9bee63e2c8a98ad4dd
• https://git.kernel.org/stable/c/288721013605b4e0304e10f6a087b77f71cfad11
• https://git.kernel.org/stable/c/598daa5f95883f881a54967da40ce0fdfc1fdaa8
• https://git.kernel.org/stable/c/60eab87d0a798070bf5a856b1d9e5785ce92da53
• https://git.kernel.org/stable/c/79a3257280a335bbebbcd10d3895e8468bdcd6ae
• https://git.kernel.org/stable/c/99d8dc51663747078c031acac32edc6d90c8f1f7
• https://git.kernel.org/stable/c/c45c997d0c27359b502587897f775c5a277f0bd4

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