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CVE-2023-52626: net/mlx5e: Fix operation precedence bug in port timestamping napi_poll context

• Severity: high (CVSS 7.1 v3.1)
• 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: 2024-03-26 · updated 2026-06-17
• Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix operation precedence bug in port timestamping napi_poll context Indirection (*) is of lower precedence than postfix increment (++). Logic in napi_poll context would cause an out-of-bound read by first increment the pointer address by byte address space and then dereference the value. Rather, the intended logic was to dereference first and then increment the underlying value.

Affected products

• Linux kernel: from 6.6.3 before 6.6.15; from 6.7 before 6.7.3; 6.8-rc1 — fixed in 6.6.15, 6.7.3

How to fix

Upgrade to a fixed version: Linux kernel 6.6.15, 6.7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/33cdeae8c6fb58cc445f859b67c014dc9f60b4e0
• https://git.kernel.org/stable/c/3876638b2c7ebb2c9d181de1191db0de8cac143a
• https://git.kernel.org/stable/c/40e0d0746390c5b0c31144f4f1688d72f3f8d790
• https://git.kernel.org/stable/c/33cdeae8c6fb58cc445f859b67c014dc9f60b4e0
• https://git.kernel.org/stable/c/3876638b2c7ebb2c9d181de1191db0de8cac143a
• https://git.kernel.org/stable/c/40e0d0746390c5b0c31144f4f1688d72f3f8d790

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