CVE-2023-52667: net/mlx5e: fix a potential double-free in fs_any_create_groups

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-17 · updated 2026-08-04
Weakness: CWE-415

Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: fix a potential double-free in fs_any_create_groups When kcalloc() for ft->g succeeds but kvzalloc() for in fails, fs_any_create_groups() will free ft->g. However, its caller fs_any_create_table() will free ft->g again through calling mlx5e_destroy_flow_table(), which will lead to a double-free. Fix this by setting ft->g to NULL in fs_any_create_groups().

Affected products

Linux kernel: from 5.13 before 5.15.149; from 5.16 before 6.1.76; from 6.2 before 6.6.15; from 6.7 before 6.7.3; 6.8-rc1 — fixed in 5.15.149, 6.1.76, 6.6.15, 6.7.3

How to fix

Upgrade to a fixed version: Linux kernel 5.15.149, 6.1.76, 6.6.15, 6.7.3. Check the vendor advisory for mitigations.

References

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