Critical 9.8Published Aug 15, 2026

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

Updated under an hour ago (Oct 27, 2026, 2:00 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Aug 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a before 844b8525ce503405c462ad67f750bec648720397; from 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a before 83bb0ed050e2ad9453d8ef50e4d6e624eac6eed8; from 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a before 107a4cb0d47e735830f852d83970d5c81f8e1e08	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.