CVEvulnerability
CVE-2026-89794
- Status
- Received
- Published
- 2026-09-16
- Last modified
- 2026-10-30
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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.
References
- https://git.kernel.org/stable/c/134d980491b435e5cdb3171225e2506ff17867d1 git.kernel.org
- https://git.kernel.org/stable/c/73f860489e3be2245598d1819226304fc5b87291 git.kernel.org
- https://git.kernel.org/stable/c/be15b8da4a82cf1e1f9880b2661b90770606eec1 git.kernel.org
- https://git.kernel.org/stable/c/c7516bdf7d2c1a64b14a9f444e2ee58c12c384ae git.kernel.org
- https://git.kernel.org/stable/c/d83a9de7cecd401c3d3e00ed6371194dcd7313e4 git.kernel.org
- https://git.kernel.org/stable/c/f188a400dd5285fec5a84548fe8dca49eee01155 git.kernel.org