CVE-2026-89794

linux: In the Linux kernel, the following vulnerability has been resolved: ksmbd: zero pipe read compound padding Compound...

CVE-2026-89794 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-89794, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
n/a
No vendor severity
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0022
11th percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
linux · Debian 13.5 (trixie) 6.12.111-1 DEBIAN-CVE-2026-89794 Sep 23, 2026
linux · Debian 14 7.2.6-1 DEBIAN-CVE-2026-89794 Sep 23, 2026
linux-6.12 · Debian 12.15 (bookworm) 6.12.111-1~deb12u1 DEBIAN-CVE-2026-89794 Sep 23, 2026

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