What’s Vulnerable › Vulnerabilities

CVE-2026-74433: rxrpc: Fix UAF in rxgk_issue_challenge()

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix UAF in rxgk_issue_challenge() Fix rxgk_issue_challenge() to free the page containing the challenge content after invoking the tracepoint as the whdr passed to the tracepoint points into the page just freed.

Affected products

• Linux kernel: 6.16 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/107a4cb0d47e735830f852d83970d5c81f8e1e08
• https://git.kernel.org/stable/c/83bb0ed050e2ad9453d8ef50e4d6e624eac6eed8
• https://git.kernel.org/stable/c/844b8525ce503405c462ad67f750bec648720397

Get alerted when CVE-2026-74433 or the next vulnerability affects your stack