Critical severity · published Aug 15, 2026
CVE-2026-74433
rxrpc: Fix UAF in rxgk_issue_challenge()
9.8
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a before 844b8525ce503405c462ad67f750bec648720397; 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a before 83bb0ed050e2ad9453d8ef50e4d6e624eac6eed8; 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a before 107a4cb0d47e735830f852d83970d5c81f8e1e08; 6.16 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74433
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-74433
git.kernel.org
https://git.kernel.org/stable/c/107a4cb0d47e735830f852d83970d5c81f8e1e08
git.kernel.org
https://git.kernel.org/stable/c/83bb0ed050e2ad9453d8ef50e4d6e624eac6eed8
git.kernel.org
https://git.kernel.org/stable/c/844b8525ce503405c462ad67f750bec648720397
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