# CVE-2026-89609

## Summary

- **CVE ID:** CVE-2026-89609
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/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:

ecryptfs: hold msg ctx list lock when cleaning daemon queue

ecryptfs_exorcise_daemon() drops queued messages from a dying daemon
without holding ecryptfs_msg_ctx_lists_mux, but
ecryptfs_msg_ctx_alloc_to_free() requires that lock.

Take the list lock while moving the queued contexts back to the free
list to avoid racing with other global msg ctx list users.

## Affected Products

- Linux — Linux (f66e883eb6186bc43a79581b67aff7d1a69d0ff1)
- Linux — Linux (2.6.26)
- 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 (5.10.270)
- Linux — Linux (5.15.221)
- Linux — Linux (6.1.188)
- Linux — Linux (6.6.157)

## References

- [CNA](https://git.kernel.org/stable/c/7e48afafe7abc275f7b6916613bb18b821e7d94a)
- [CNA](https://git.kernel.org/stable/c/0d9636ecba34bd553ecf19049f7705505aea62fd)
- [CNA](https://git.kernel.org/stable/c/4c02acbe0a2692ca9991c51e62bbe6d6b59dac31)
- [CNA](https://git.kernel.org/stable/c/779972513c2fa8c7938e54976f686091dafff22f)
- [CNA](https://git.kernel.org/stable/c/64d8998e36cfd2bb7114f3af0aa51c5a559a39b3)
- [CNA](https://git.kernel.org/stable/c/4d50b8aea11ad9594c8704a4c647e11311ab7b19)
- [CNA](https://git.kernel.org/stable/c/956541efd125a10442f9514668bc5c852702c93b)
- [CNA](https://git.kernel.org/stable/c/ec1627bcb5b51ddd46b1ef27a9d5a9834abb0a6a)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.18%
- **EPSS Percentile:** 7.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._