What’s Vulnerable › Vulnerabilities

CVE-2024-26677: rxrpc: Fix delayed ACKs to not set the reference serial number

• Severity: medium (CVSS 5.5 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: 2024-04-02 · updated 2026-10-30
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix delayed ACKs to not set the reference serial number Fix the construction of delayed ACKs to not set the reference serial number as they can't be used as an RTT reference.

Affected products

• Linux kernel: from 2.6.22 before 6.6.17; from 6.7 before 6.7.5; 6.8-rc1, 6.8-rc2, 6.8-rc3 — fixed in 6.6.17, 6.7.5
• Linux: 2.6.22 — fixed in 6.8

How to fix

Upgrade to a fixed version: Linux kernel 6.6.17, 6.7.5; Linux 6.8. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/200cb50b9e154434470c8969d32474d38475acc2
• https://git.kernel.org/stable/c/63719f490e6a89896e9a463d2b45e8203eab23ae
• https://git.kernel.org/stable/c/7a72f92f42b728f0d45efa081e78d1ebaf7ac725
• https://git.kernel.org/stable/c/e7870cf13d20f56bfc19f9c3e89707c69cf104ef
• https://git.kernel.org/stable/c/200cb50b9e154434470c8969d32474d38475acc2
• https://git.kernel.org/stable/c/63719f490e6a89896e9a463d2b45e8203eab23ae
• https://git.kernel.org/stable/c/e7870cf13d20f56bfc19f9c3e89707c69cf104ef

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