What’s Vulnerable › Vulnerabilities

CVE-2022-49633: icmp: Fix data-races around sysctl_icmp_echo_enable_probe.

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

Affected products

• Linux kernel: from 5.13 before 5.15.56; from 5.16 before 5.18.13; 5.19-rc1, 5.19-rc2, 5.19-rc3, 5.19-rc4, 5.19-rc5, 5.19-rc6 — fixed in 5.15.56, 5.18.13

How to fix

Upgrade to a fixed version: Linux kernel 5.15.56, 5.18.13. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/05c615033174f1d19374f42285ccd8e9af13e427
• https://git.kernel.org/stable/c/4a2f7083cc6cb72dade9a63699ca352fad26d1cd
• https://git.kernel.org/stable/c/cce955efa0ab81f7fb72e22beed372054c86005c

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