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CVE-2026-72460: apparmor: check label build before no_new_privs test

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

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.

Affected products

• Linux kernel: 4.13 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

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

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