PT-2025-38353 · Linux+2 · Linux Kernel+2

Published 2023-08-19 · Updated 2025-12-12 · CVE-2023-53374

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel's Bluetooth implementation where SCO/ISO connections may fail if the ACL connection is terminated prematurely. This issue arises from a use-after-free condition when cleaning up connections without properly calling hci (dis)connect cfm before deleting the connection reference. The vulnerability is addressed by using hci conn failed to ensure proper connection cleanup in scenarios where the ACL connection is lost early, including during ISO connection establishment before the LE Create CIS is sent.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2026-03327

CVE-2023-53374

SUSE-SU-2025:03600-1

SUSE-SU-2025:03634-1

SUSE-SU-2025:20851-1

SUSE-SU-2025:20861-1

SUSE-SU-2025:20870-1

SUSE-SU-2025:20898-1

SUSE-SU-2025:3751-1

SUSE-SU-2025:4057-1

SUSE-SU-2025:4132-1

SUSE-SU-2025:4141-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 1406

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53374.json · Exploit
• https://bdu.fstec.ru/vul/2026-03327 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2023-53374 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53374 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53374 · Security Note
• https://git.kernel.org/stable/c/397d58007532644b35fad746da48c41161f32a57 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2023-53374 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:20851-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4141-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:20861-1 · Vendor Advisory
• https://git.kernel.org/stable/c/e94b898463a62b72a2a8b75dea8936bf4db78e00 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:20870-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53374 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:4057-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:20898-1 · Vendor Advisory