Linux Kernel up to 5.4.207/5.10.133/5.15.57/5.18.14 sysctl_tcp_min_snd_mss information disclosure

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.4.207/5.10.133/5.15.57/5.18.14. It has been declared as problematic. This affects the function sysctl_tcp_min_snd_mss. The manipulation results in information disclosure. This vulnerability is identified as CVE-2022-49596. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 5.4.207/5.10.133/5.15.57/5.18.14. Affected is the function sysctl_tcp_min_snd_mss. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

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

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2022-49596 since 02/26/2025. The exploitability is told to be difficult. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 238183 (EulerOS 2.0 SP12 : kernel (EulerOS-SA-2025-1590)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.208, 5.10.134, 5.15.58 or 5.18.15 eliminates this vulnerability. Applying the patch fdb96b69f5909ffcdd6f1e0902219fc6d7689ff7/97992e8feff33b3ae154a113ec398546bbacda80/0fc9357282df055e30990b29f4b7afa53ab42cdb/0d8a39feb58910a7f7746b1770ee5578cc551fe6/78eb166cdefcc3221c8c7c1e2d514e91a2eb5014 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 (238183). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 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

Once again VulDB remains the best source for vulnerability data.

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