CVE-2026-89794
In the Linux kernel, the following vulnerability has been resolved: ksmbd: zero pipe read compound padding Compound response handling extends the last response iov to an eight-byte boundary. smb2_read_pipe() allocates only the payload size, so the alignment padding can expose up to seven bytes of uninitialized kernel heap memory. Allocate the aligned size and clear the unused tail before pinning the response buffer.
Affected versions
Linux kernel versions
5.15.145,
6.1.71,
6.6
and later are affected. Fixed in
6.12.110,
6.18.51,
7.2.5,
7.3-rc2
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-89794?
CVE-2026-89794 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.15.145 onward and has been patched in 6.12.110, 6.18.51, 7.2.5 and others. CVE-2026-89794 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-89794?
Yes. CVE-2026-89794 has been patched. Fixed versions include 6.12.110, 6.18.51, 7.2.5 and others. If you are running Linux kernel 5.15.145 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-89794 actively exploited?
No. CVE-2026-89794 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.