What’s Vulnerable › Vulnerabilities

CVE-2022-49574: tcp: Fix data-races around sysctl_tcp_recovery.

• 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_recovery. While reading sysctl_tcp_recovery, it can be changed concurrently. Thus, we need to add READ_ONCE() to its readers.

Affected products

• Linux kernel: from 4.4 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/52ee7f5c4811ce6be1becd14d38ba1f8a8a0df81
• https://git.kernel.org/stable/c/92c35113c63306091df9211375eebd0abd8c2160
• https://git.kernel.org/stable/c/a31e2d0cb5cfa2aae3144cac04f25031d5d20fb4
• https://git.kernel.org/stable/c/c7a492db1f7c37c758a66915908677bd8bc5d368
• https://git.kernel.org/stable/c/d8781f7cd04091744f474a2bada74772084b9dc9
• https://git.kernel.org/stable/c/e7d2ef837e14a971a05f60ea08c47f3fed1a36e4

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