Linux Kernel up to 5.19.3 apparmor aa_simple_write_to_buffer allocation of resources

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel up to 4.19.255/5.4.210/5.10.137/5.15.62/5.19.3. This vulnerability affects the function aa_simple_write_to_buffer of the component apparmor. This manipulation causes allocation of resources. This vulnerability appears as CVE-2022-50074. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.19.255/5.4.210/5.10.137/5.15.62/5.19.3. It has been declared as problematic. Affected by this vulnerability is the function aa_simple_write_to_buffer of the component apparmor. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. The impact remains unknown. The summary by CVE is:

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.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2022-50074 since 06/18/2025. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 271309 (EulerOS 2.0 SP13 : kernel (EulerOS-SA-2025-2264)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.19.256, 5.4.211, 5.10.138, 5.15.63 or 5.19.4 eliminates this vulnerability. Applying the patch 6500eb3a48ac221051b1791818a1ac74744ef617/7db182a2ebeefded86fea542fcc5d6a68bb77f58/8aab4295582eb397a125d2788b829fa62b88dbf7/bf7ebebce2c25071c719fd8a2f1307e0c243c2d7/6583edbf459de2e06b9759f264c0ae27e452b97a/417ea9fe972d2654a268ad66e89c8fcae67017c3 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (271309) and CERT Bund (WID-SEC-2025-1350). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• Open Source Linux Kernel
• RESF Rocky Linux
• Dell Avamar
• Dell NetWorker
• Dell Secure Connect Gateway
• IBM QRadar SIEM

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.19.255
• 5.4.210
• 5.10.137
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.15.27
• 5.15.28
• 5.15.29
• 5.15.30
• 5.15.31
• 5.15.32
• 5.15.33
• 5.15.34
• 5.15.35
• 5.15.36
• 5.15.37
• 5.15.38
• 5.15.39
• 5.15.40
• 5.15.41
• 5.15.42
• 5.15.43
• 5.15.44
• 5.15.45
• 5.15.46
• 5.15.47
• 5.15.48
• 5.15.49
• 5.15.50
• 5.15.51
• 5.15.52
• 5.15.53
• 5.15.54
• 5.15.55
• 5.15.56
• 5.15.57
• 5.15.58
• 5.15.59
• 5.15.60
• 5.15.61
• 5.15.62
• 5.19.0
• 5.19.1
• 5.19.2
• 5.19.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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