CVE-2023-53673 — Use After Free in Linux

CWE-416 — Use After Free5 documents5 sources
Severity
7.8HIGHNVD
EPSS
0.0%
top 99.50%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedOct 7

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: call disconnect callback before deleting conn In hci_cs_disconnect, we do hci_conn_del even if disconnection failed. ISO, L2CAP and SCO connections refer to the hci_conn without hci_conn_get, so disconn_cfm must be called so they can clean up their conn, otherwise use-after-free occurs. ISO: iso_sock_connect:880: sk 00000000eabd6557 iso_connect_cis:356: 70:1a:b8:98:ff:a2 -> 28:3d:c2:4a:7e:da ... iso_con…

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages4 packages

▶NVDlinux/linux_kernel5.7 — 6.1.42+2
▶Debianlinux/linux_kernel< 6.1.52-1+2
▶CVEListV5linux/linuxb8d290525e3972b5e876b2649a42bf4081d753fe — 1ecf6dc2676ead4b927c50b1be0851fa4d756574+4
▶debiandebian/linux< linux 6.1.52-1 (bookworm)

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

2
OSV
CVE-2023-53673: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: call disconnect callback before deleting conn In hci_cs_disc↗2025-10-07
▶
GHSA
GHSA-7v48-2x62-5ff3: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: call disconnect callback before deleting conn In hci_cs_di↗2025-10-07
▶

📋Vendor Advisories

2
Red Hat
kernel: Bluetooth: hci_event: call disconnect callback before deleting conn↗2025-10-07
▶
Debian
CVE-2023-53673: linux - In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ...↗2023
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