CVE-2026-89794

Published: September 18, 2026Last modified: September 18, 2026

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.

Status

References

• https://git.kernel.org/stable/c/73f860489e3be2245598d1819226304fc5b87291
• https://git.kernel.org/stable/c/be15b8da4a82cf1e1f9880b2661b90770606eec1
• https://git.kernel.org/stable/c/d83a9de7cecd401c3d3e00ed6371194dcd7313e4
• https://git.kernel.org/stable/c/f188a400dd5285fec5a84548fe8dca49eee01155