Linux Kernel up to 5.18.14 READ_ONCE information disclosure

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 4.19.253/5.4.207/5.10.133/5.15.57/5.18.14. This vulnerability affects the function READ_ONCE. The manipulation leads to information disclosure. This vulnerability is traded as CVE-2022-49572. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.19.253/5.4.207/5.10.133/5.15.57/5.18.14. It has been rated as problematic. This issue affects the function READ_ONCE. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: tcp: Fix data-races around sysctl_tcp_slow_start_after_idle. While reading sysctl_tcp_slow_start_after_idle, it can be changed concurrently. Thus, we need to add READ_ONCE() to its readers.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2022-49572 since 02/26/2025. The exploitation is known to be difficult. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 233373 (Amazon Linux 2 : kernel (ALASKERNEL-5.10-2025-086)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.19.254, 5.4.208, 5.10.134, 5.15.58 or 5.18.15 eliminates this vulnerability. Applying the patch 3b26e11b07a09b31247688bec61e2925d4a571b6/369d99c2b89f54473adcf9acdf40ea562b5a6e0e/0e3f82a03ec8c3808e87283e12946227415706c9/41aeba4506f6b70ec7500c6fe202731a4ba29fe5/68b6f9506747d507c7bfa374d178929b4157e8c6/4845b5713ab18a1bb6e31d1fbb4d600240b8b691 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 vulnerability database at Tenable (233373). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.19.253
• 5.4.207
• 5.10.133
• 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
• 5.18.0
• 5.18.1
• 5.18.2
• 5.18.3
• 5.18.4
• 5.18.5
• 5.18.6
• 5.18.7
• 5.18.8
• 5.18.9
• 5.18.10
• 5.18.11
• 5.18.12
• 5.18.13
• 5.18.14

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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