# CVE-2025-38437: ksmbd: fix potential use-after-free in oplock/lease break ack

CVE-2025-38437 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-38437, released July 25, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-38437
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0045
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 25, 2025
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-38437

## Description

In the Linux kernel, the following vulnerability has been resolved:  ksmbd: fix potential use-after-free in oplock/lease break ack  If ksmbd_iov_pin_rsp return error, use-after-free can happen by accessing opinfo->state and opinfo_put and ksmbd_fd_put could called twice.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.147-1 | [DEBIAN-CVE-2025-38437](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38437.md) | Jul 25, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.12.41-1 | [DEBIAN-CVE-2025-38437](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38437.md) | Jul 25, 2025 |
| Linux | linux Debian 14 | 6.16.3-1 | [DEBIAN-CVE-2025-38437](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38437.md) | Jul 25, 2025 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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