Linux Kernel up to 5.18.14 READ_ONCE information disclosure

Summaryinfo

A vulnerability has been found in Linux Kernel up to 5.18.14 and classified as problematic. Impacted is the function READ_ONCE. This manipulation causes information disclosure. This vulnerability is handled as CVE-2022-49587. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 5.18.14. Affected by this vulnerability is the function READ_ONCE. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

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

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2022-49587 since 02/26/2025. The exploitation appears to be difficult. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 241826 (EulerOS 2.0 SP10 : kernel (EulerOS-SA-2025-1800)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.325, 4.14.290, 4.19.254, 5.4.208, 5.10.134, 5.15.58 or 5.18.15 eliminates this vulnerability. Applying the patch 91e21df688f8a75255ca9c459da39ac96300113a/c1b85c5a34294f7444c13bf828e0e84b0a0eed85/0f75343584ee474303e17efe0610bdd170af1d13/e9362a993886613ef0284c2a4911c6017c97d803/fd6f1284e380c377932186042ff0b5c987fb2b92/80d4d0c461674eea87f0977e12a2ecd334b9b79c/62e56cfeb2ae4b53ae9ca24c80f54093250ce64a/55be873695ed8912eb77ff46d1d1cadf028bd0f3 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 (241826). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.9.324
• 4.14.289
• 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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CPE 2.2info

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CVSSv4info

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Exploitinginfo

Threat Intelligenceinfo

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Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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