Linux Kernel kernel crypto subsystem Vulnerability Rated 7.5 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-74750

Key Details

CVE	CVE-2026-74750
CVSS Score / Version	7.5 (High) / CVSS v3.1
Updated	2026-10-15
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is none; availability impact is high.
Affected products	Linux Kernel
Exploitation prediction (EPSS)	0.49% probability of exploitation in the next 30 days (41% percentile) -- FIRST.org's EPSS model.

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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

ovpn: defer key slot crypto freeing to workqueue

Key slots are released through a kref and the existing release path

frees the AEAD transforms from an RCU callback. That is not safe for all

crypto implementations: crypto_free_aead can sleep, for example when an

async or hardware implementation has teardown work to complete.

Use queue_rcu_work for key-slot release. This keeps the RCU grace period

needed by lockless key-slot readers, but runs the actual crypto teardown

from workqueue context where sleeping is allowed. Once the rcu_work

callback runs, pre-existing RCU readers are gone, and the final kref put

already proves that no transform user remains, so the worker can release

the AEAD transforms and free the slot directly.

The previous patch drains ovpn_wq during module exit, so queued key-slot

teardown work cannot outlive module text. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74750
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74750

Source

Reference

NVD

CVE