Description
A Red Hat only CVE-2020-12351 regression issue was found in the way the Linux kernel's Bluetooth implementation handled L2CAP packets with A2MP CID. This flaw allows a remote attacker in an adjacent range to crash the system, causing a denial of service or potentially executing arbitrary code on the system by sending a specially crafted L2CAP packet. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | kernel | kernel-4.18.0-240.el8 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | linux-raspi2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-hwe | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-240.1.1.rt7.55.el8_3 | RHSA-2020:4686 |
| RHEL 8 | perf +26 | 4.18.0-240.1.1.el8_3 | RHSA-2020:4685 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-240.1.1.el8_3 | ELSA-2020-4685 |
Advisories 3
- RHSA-2020:4686 Red Hat Security Advisory: kernel-rt security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:4685 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- ELSA-2020-4685 Important: kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 13, 2020