CVE-2026-89794
Unknown
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.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedSep 16, 2026
First seenSep 16, 2026
How to fix
Update
- Linux Linuxc7516bdf7d2c1a64b14a9f444e2ee58c12c384ae, 134d980491b435e5cdb3171225e2506ff17867d1, f188a400dd5285fec5a84548fe8dca49eee01155, d83a9de7cecd401c3d3e00ed6371194dcd7313e4, be15b8da4a82cf1e1f9880b2661b90770606eec1, 73f860489e3be2245598d1819226304fc5b87291, 6.1.191, 5.16 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 9f297df20d93411c0b4ddad7f88ba04a7cd36e77 ≤ v < c7516bdf7d2c1a64b14a9f444e2ee58c12c384ae, e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d ≤ v < 134d980491b435e5cdb3171225e2506ff17867d1, e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d ≤ v < f188a400dd5285fec5a84548fe8dca49eee01155, e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d ≤ v < d83a9de7cecd401c3d3e00ed6371194dcd7313e4, e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d ≤ v < be15b8da4a82cf1e1f9880b2661b90770606eec1, e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d ≤ v < 73f860489e3be2245598d1819226304fc5b87291, f2283680a80571ca82d710bc6ecd8f8beac67d63, 6.1.71 ≤ v < 6.1.191, 5.15.145 ≤ v < 5.16, 6.6 | c7516bdf7d2c1a64b14a9f444e2ee58c12c384ae, 134d980491b435e5cdb3171225e2506ff17867d1, f188a400dd5285fec5a84548fe8dca49eee01155, d83a9de7cecd401c3d3e00ed6371194dcd7313e4, be15b8da4a82cf1e1f9880b2661b90770606eec1, 73f860489e3be2245598d1819226304fc5b87291, 6.1.191, 5.16 |
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