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CVE-2026-74538

Bluetooth: ISO: lock sk in iso_connect_ind

HIGH
8.8
CVSS Score
Published: August 15, 2026 at 12:27 PM UTC
Updated: October 21, 2026 at 01:19 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: lock sk in iso_connect_ind Accessing iso_pi(sk)->conn requires lock_sock, which is not taken in the "ev3" part of iso_connect_ind. It may also be NULL if socket has transitioned away from the LISTEN/CONNECT states before locking. Fix by adding lock/release. Recheck hcon is valid after lock acquire where needed.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
168d9bf9c7f01df71e6404cfff66d9c2a8e968fb489efc9ae36f164423f5fa7ace772a7ab8131cd86.8.96.9
Vendor states this is fixed in 4311fd6f429065a8ba208660360a895627a00cf3 (fixed)
Vendor states this is fixed in 9bee7e476534f27e830658dad962d85da9edf6bf (fixed)
Vendor states this is fixed in e8e9cff6d80eeec28dec4cf7cc18662986945391 (fixed)
Vendor states this is fixed in 6.12.114 (unaffected)
Vendor states this is fixed in 6.18.44 (unaffected)
Vendor states this is fixed in 6.9 (unaffected)
Vendor states this is fixed in 7.1.8 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

Source: cverecord
https://git.kernel.org/stable/c/e8e9cff6d80eeec28dec4cf7cc18662986945391
Source: cverecord
https://git.kernel.org/stable/c/9bee7e476534f27e830658dad962d85da9edf6bf
Source: cverecord
https://git.kernel.org/stable/c/4311fd6f429065a8ba208660360a895627a00cf3
Source: cverecord
https://git.kernel.org/stable/c/0e830354c120954ccb9ca15880245912722c4031

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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