CVE-2025-37788: cxgb4: fix memory leak in cxgb4_init_ethtool_filters() error path

Severity: medium (CVSS 5.5 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: 2025-05-01 · updated 2026-06-17
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: cxgb4: fix memory leak in cxgb4_init_ethtool_filters() error path In the for loop used to allocate the loc_array and bmap for each port, a memory leak is possible when the allocation for loc_array succeeds, but the allocation for bmap fails. This is because when the control flow goes to the label free_eth_finfo, only the allocations starting from (i-1)th iteration are freed. Fix that by freeing the loc_array in the bmap allocation error path.

Affected products

Debian Linux: 11.0
Linux kernel: from 5.9 before 5.10.237; from 5.11 before 5.15.181; from 5.16 before 6.1.135; from 6.2 before 6.6.88; from 6.7 before 6.12.25; from 6.13 before 6.14.4 — fixed in 5.10.237, 5.15.181, 6.1.135, 6.12.25, 6.14.4, 6.6.88

How to fix

Upgrade to a fixed version: Linux kernel 5.10.237, 5.15.181, 6.1.135, 6.12.25. Check the vendor advisory for mitigations.

References

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