What’s Vulnerable › Vulnerabilities

CVE-2022-3565: Linux Kernel Bluetooth l1oip_core.c del_timer use after free

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-10-17 · updated 2026-10-14
• Weakness: CWE-119

Description

A vulnerability, which was classified as critical, has been found in Linux Kernel. Affected by this issue is the function del_timer of the file drivers/isdn/mISDN/l1oip_core.c of the component Bluetooth. The manipulation leads to use after free. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-211088.

Affected products

• Linux kernel: from 2.6.27 before 4.9.331; from 4.10 before 4.14.296; from 4.15 before 4.19.262; from 4.20 before 5.4.220; from 5.5 before 5.10.150; from 5.11 before 5.15.75 — fixed in 4.14.296, 4.19.262, 4.9.331, 5.10.150, 5.15.75, 5.19.17

How to fix

Upgrade to a fixed version: Linux kernel 4.14.296, 4.19.262, 4.9.331, 5.10.150. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=2568a7e0832ee30b0a351016d03062ab4e0e0a3f
• https://lists.debian.org/debian-lts-announce/2022/12/msg00031.html
• https://lists.debian.org/debian-lts-announce/2022/12/msg00034.html
• https://vuldb.com/?id.211088
• https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=2568a7e0832ee30b0a351016d03062ab4e0e0a3f
• https://lists.debian.org/debian-lts-announce/2022/12/msg00031.html
• https://lists.debian.org/debian-lts-announce/2022/12/msg00034.html
• https://vuldb.com/?id.211088
• https://cert-portal.siemens.com/productcert/html/ssa-794697.html

Get alerted when CVE-2022-3565 or the next vulnerability affects your stack