What’s Vulnerable › Vulnerabilities

CVE-2022-50074: apparmor: Fix memleak in aa_simple_write_to_buffer()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-18 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix memleak in aa_simple_write_to_buffer() When copy_from_user failed, the memory is freed by kvfree. however the management struct and data blob are allocated independently, so only kvfree(data) cause a memleak issue here. Use aa_put_loaddata(data) to fix this issue.

Affected products

• Linux kernel: from 4.17 before 4.19.256; from 4.20 before 5.4.211; from 5.5 before 5.10.138; from 5.11 before 5.15.63; from 5.16 before 5.19.4 — fixed in 4.19.256, 5.10.138, 5.15.63, 5.19.4, 5.4.211

How to fix

Upgrade to a fixed version: Linux kernel 4.19.256, 5.10.138, 5.15.63, 5.19.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/417ea9fe972d2654a268ad66e89c8fcae67017c3
• https://git.kernel.org/stable/c/6500eb3a48ac221051b1791818a1ac74744ef617
• https://git.kernel.org/stable/c/6583edbf459de2e06b9759f264c0ae27e452b97a
• https://git.kernel.org/stable/c/7db182a2ebeefded86fea542fcc5d6a68bb77f58
• https://git.kernel.org/stable/c/8aab4295582eb397a125d2788b829fa62b88dbf7
• https://git.kernel.org/stable/c/bf7ebebce2c25071c719fd8a2f1307e0c243c2d7

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