# 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.

- Web page: https://patchblox.com/security/cve/CVE-2026-89794
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.111-1 | [DEBIAN-CVE-2026-89794](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89794.md) | Sep 23, 2026 |
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-89794](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89794.md) | Sep 23, 2026 |
| Linux | linux-6.12 Debian 12.15 (bookworm) | 6.12.111-1~deb12u1 | [DEBIAN-CVE-2026-89794](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89794.md) | Sep 23, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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