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CVE-2022-3640

Linux Kernel Bluetooth l2cap_core.c l2cap_conn_del use after free

HIGH
8.8
CVSS Score
Published: October 21, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:59 AM UTC
3 products affected across 3 vendorsLinux KernelDebian LinuxFedora

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Severity
HIGH8.8
Exploit prediction
EPSS 1%

Description

A vulnerability, which was classified as critical, was found in Linux Kernel. Affected is the function l2cap_conn_del of the file net/bluetooth/l2cap_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-211944.

Affected

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

Debian Linux· Debiandrupal
95%
10.0
Fedora· Fedora Projectrpm
95%
353637
Linux Kernel· Linux
95%
4.14.291 ≤ v < 4.14.2994.19.255 ≤ v < 4.19.2654.9.326 ≤ v < 4.9.3335.10.135 ≤ v < 5.10.1545.15.59 ≤ v < 5.15.795.18.16 ≤ v < 6.0.85.4.209 ≤ v < 5.4.224
Affected range stops below 4.14.299, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.19.265, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.333, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.10.154, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.15.79, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.224, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.0.8, so it looks safe — our inference, not a vendor statement

References (7)

ExploitMailing ListPatchVendor Advisory
Source: [email protected]
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=42cf46dea905a80f6de218e837ba4d4cc33d6979
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2022/12/msg00031.html
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2022/12/msg00034.html
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DGOIRR72OAFE53XZRUDZDP7INGLIC3E3/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OD7VWUT7YAU4CJ247IF44NGVOAODAJGC/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XG2UPX3MQ7RKRJEUMGEH2TLPKZJCBU5C/
Third Party Advisory
Source: [email protected]
https://vuldb.com/?id.211944

CVSS

8.8HIGH[email protected]
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119CWE-416

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