Description
The Linux kernel, as used in Red Hat Enterprise Linux 7.2 and Red Hat Enterprise MRG 2 and when booted with UEFI Secure Boot enabled, allows local users to bypass intended Secure Boot restrictions and execute untrusted code by appending ACPI tables to the initrd.
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-514.rt56.420.el7 | RHSA-2016:2584 |
| RHEL 7 | perf +18 | 3.10.0-514.el7 | RHSA-2016:2574 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.14.2.el6uek | 0.4.5-3.el6 | ELSA-2016-3645 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.14.2.el7uek | 0.4.5-3.el7 | ELSA-2016-3645 |
| Oracle Linux 7 | dtrace-modules-4.1.12-61.1.19.el6uek | 0.5.3-2.el6 | ELSA-2016-3644 |
| Oracle Linux 7 | dtrace-modules-4.1.12-61.1.19.el7uek | 0.5.3-2.el7 | ELSA-2016-3644 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.14.2.el7uek | ELSA-2016-3645, ELSA-2016-3644 |
| Oracle Linux 7 | perf +11 | 3.10.0-514.el7 | ELSA-2016-2574 |
Advisories 5
- RHSA-2016:2584 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:2574 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- ELSA-2016-3645 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 20, 2016
- ELSA-2016-3644 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 20, 2016
- ELSA-2016-2574 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 9, 2016
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1329653
- https://github.com/mjg59/linux/commit/a4a5ed2835e8ea042868b7401dced3f517cafa76
- [oss-security] 20160922 kernel: ACPI table override is allowed when securelevel is enabled mailing-list
- RHSA-2016:2584 vendor-advisory
- RHSA-2016:2574 vendor-advisory
- 93114 vdb-entry