CVE-2026-74537

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-74537

Key Details

CVE	CVE-2026-74537
CVSS Score / Version	8.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is adjacent; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Affected Products, Subsystems & Sectors

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

What to Know

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

Bluetooth: ISO: hold sk properly in iso_conn_ready

sk deref in iso_conn_ready must be done either under conn->lock, or

holding a refcount, to avoid concurrent close. conn->sk is currently

accessed without either:

[Task 1] [Task 2]

iso_sock_release

iso_conn_ready

sk = conn->sk

lock_sock(sk)

conn->sk = NULL

lock_sock(sk)

release_sock(sk)

iso_sock_kill(sk)

UAF on sk deref

Fix possible UAF by holding sk refcount in iso_conn_ready(). Also

recheck after lock_sock that the socket is still valid. Adjust locking

so conn->sk is cleared only under lock_sock. (NVD)

What to Do

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

References

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74537
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74537

Source

Reference

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-74537

CVE

https://www.cve.org/CVERecord?id=CVE-2026-74537