# CVE-2026-89636

## Summary

- **CVE ID:** CVE-2026-89636
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 14, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:

smb: client: clear ce->tgthint in free_tgts()

When free_tgts() frees all structures in ce->tlist, ce->tgthint
is left pointing to one of the freed cache_dfs_tgt structures.

If ce->tgthint is not reset before it is used later, it results
in a use-after-free.

Set ce->tgthint to NULL in free_tgts() after the elements are
freed to reflect that no elements remain.

## Affected Products

- Linux — Linux (54be1f6c1c37498bba557049df646cc239fa37e3)
- Linux — Linux (5.0)
- Linux — Linux (0)
- Linux — Linux (6.12.109)
- Linux — Linux (6.18.50)
- Linux — Linux (7.2.4)
- Linux — Linux (7.3-rc1)
- Linux — Linux (6.1.188)
- Linux — Linux (6.6.157)

## References

- [CNA](https://git.kernel.org/stable/c/7507bd1885643d0461a6017767492450af1ce2a3)
- [CNA](https://git.kernel.org/stable/c/9ab46a13798a61d9d020b01d4e57efdabe6624fa)
- [CNA](https://git.kernel.org/stable/c/5baab40404a9393bcc0b7b8f1950bf2c307e0984)
- [CNA](https://git.kernel.org/stable/c/b1b741cf8e7ce1b91d937e23decd3d3358748700)
- [CNA](https://git.kernel.org/stable/c/14f60e959b5ac813715ff72e127beb3584ddabf6)
- [CNA](https://git.kernel.org/stable/c/3ff9462bb7a06d8d32a1dc02d39580b078ec9e55)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.65%
- **EPSS Percentile:** 49.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-19._