What’s Vulnerable › Vulnerabilities

CVE-2022-49598: tcp: Fix data-races around sysctl_tcp_mtu_probing.

• 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 data-races around sysctl_tcp_mtu_probing. While reading sysctl_tcp_mtu_probing, it can be changed concurrently. Thus, we need to add READ_ONCE() to its readers.

Affected products

• Linux kernel: from 2.6.17 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/77a04845f0d28a3561494a5f3121488470a968a4
• https://git.kernel.org/stable/c/7e8fc428a7f680f1c4994a40e52d7f95a9a93038
• https://git.kernel.org/stable/c/aabe9438fdfe004e021d5a206227ec105dbe2416
• https://git.kernel.org/stable/c/b0920ca09d9ce19980c8391b9002455baa9c1417
• https://git.kernel.org/stable/c/f47d00e077e7d61baf69e46dde3210c886360207
• https://git.kernel.org/stable/c/f966773e13cdd3f12baa90071b7b660f6c633ccb

Get alerted when CVE-2022-49598 or the next vulnerability affects your stack