What’s Vulnerable › Vulnerabilities

CVE-2022-49575: tcp: Fix a data-race around sysctl_tcp_thin_linear_timeouts.

• Severity: medium (CVSS 4.7 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: 2025-02-26 · updated 2026-06-17
• Weakness: CWE-362

Description

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

Affected products

• Linux kernel: from 2.6.34 before 4.19.254; from 4.20 before 5.4.208; from 5.5 before 5.10.134; from 5.11 before 5.15.58; from 5.16 before 5.18.15; 5.19-rc1, 5.19-rc2, 5.19-rc3, 5.19-rc4, 5.19-rc5, 5.19-rc6 (+1) — fixed in 4.19.254, 5.10.134, 5.15.58, 5.18.15, 5.4.208

How to fix

Upgrade to a fixed version: Linux kernel 4.19.254, 5.10.134, 5.15.58, 5.18.15. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/404c53ccdebd11f96954f4070cffac8e0b4d5cb6
• https://git.kernel.org/stable/c/492f3713b282c0e67e951cd804edd22eccc25412
• https://git.kernel.org/stable/c/7c6f2a86ca590d5187a073d987e9599985fb1c7c
• https://git.kernel.org/stable/c/a0f96c4f179cb3560078cefccef105e8f1701210
• https://git.kernel.org/stable/c/cc133e4f4bc225079198192623945bb872c08143
• https://git.kernel.org/stable/c/f4b0295be9a3c4260de4585fac4062e602a88ac7

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