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CVE-2026-89794

UnknownEPSS 0.21%

Last modified

CVE-2026-89794 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
0.21%

11.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 9f297df20d93411c0b4ddad7f88ba04a7cd36e77, < c7516bdf7d2c1a64b14a9f444e2ee58c12c384ae; >= e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d, < 134d980491b435e5cdb3171225e2506ff17867d1; >= e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d, < f188a400dd5285fec5a84548fe8dca49eee01155; >= e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d, < d83a9de7cecd401c3d3e00ed6371194dcd7313e4; >= e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d, < be15b8da4a82cf1e1f9880b2661b90770606eec1; >= e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d, < 73f860489e3be2245598d1819226304fc5b87291; f2283680a80571ca82d710bc6ecd8f8beac67d63; >= 6.1.71, < 6.1.191; >= 5.15.145, < 5.16
LinuxLinux6.6

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is 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.
How severe is CVE-2026-89794?
Severity scoring for CVE-2026-89794 is pending analysis. The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2026-89794?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST