What’s Vulnerable › Vulnerabilities

CVE-2026-72345: net/mlx5: LAG, Fix off-by-one in single-FDB error rollback

• Severity: high (CVSS 7.8 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: 2026-08-15 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: LAG, Fix off-by-one in single-FDB error rollback On failure at index i, the reverse cleanup loop in mlx5_lag_create_single_fdb() starts from i, so the failed index itself is rolled back. That can operate on uninitialized state or double-tear-down a rule the add_one path already self-rolled-back. Start the rollback from i - 1 so only successfully-installed entries are undone.

Affected products

• Linux kernel: from 6.12.113 before 6.13; 6.14 — fixed in 6.13, 7.2

How to fix

Upgrade to a fixed version: Linux kernel 6.13, 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0be672071d6e8c4d3be6a8f796d8e47198763770
• https://git.kernel.org/stable/c/0f0e4ae6975c773f7854fc48932a267f6c79088f
• https://git.kernel.org/stable/c/40cc06bf71476932e5d139fa326dcd0372766e16

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