Description
A Red Hat only CVE-2020-12352 regression issue was found in the way the Linux kernel's Bluetooth stack implementation handled the initialization of stack memory when handling certain AMP packets. This flaw allows a remote attacker in an adjacent range to leak small portions of stack memory on the system by sending specially crafted AMP packets. The highest threat from this vulnerability is to data confidentiality.
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