What’s Vulnerable › Vulnerabilities

CVE-2022-49594: tcp: Fix a data-race around sysctl_tcp_mtu_probe_floor.

• 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_mtu_probe_floor. While reading sysctl_tcp_mtu_probe_floor, it can be changed concurrently. Thus, we need to add READ_ONCE() to its reader.

Affected products

• Linux kernel: from 5.4 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 5.10.134, 5.15.58, 5.18.15, 5.4.208

How to fix

Upgrade to a fixed version: Linux kernel 5.10.134, 5.15.58, 5.18.15, 5.4.208. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/033963b220633ed1602d458e7e4ac06afa9fefb2
• https://git.kernel.org/stable/c/8e92d4423615a5257d0d871fc067aa561f597deb
• https://git.kernel.org/stable/c/cc36c37f5fe066c4708e623ead96dc8f57224bf5
• https://git.kernel.org/stable/c/d5bece4df6090395f891110ef52a6f82d16685db
• https://git.kernel.org/stable/c/e2ecbf3f0aa88277d43908c53b99399d55729ff9

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