Description
A flaw was found in the Linux Kernel before 5.8-rc1 in the prctl() function, where it can be used to enable indirect branch speculation after it has been disabled. This call incorrectly reports it as being 'force disabled' when it is not and opens the system to Spectre v2 attacks. The highest threat from this vulnerability is to confidentiality.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux Kernel | kernel | before 5.8-rc1 | — |
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.7.6-1 | — |
| Debian 13 | linux | 5.7.6-1 | — |
| Debian 12 | linux | 5.7.6-1 | — |
| Debian 9 | linux-4.19 | 4.19.132-1~deb9u2 | DLA-2323-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-45.49 | USN-4483-1 |
| Ubuntu 20.04 LTS | linux-aws +2 | 5.4.0-1022.22 | USN-4483-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1023.23 | USN-4483-1 |
| Ubuntu 20.04 LTS | linux-gke +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1021.21 | USN-4483-1 |
| Ubuntu 20.04 LTS | linux-oem-5.6 | 5.6.0-1020.20 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1016.17 | USN-4483-1 |
| Ubuntu 20.04 LTS | linux-riscv | 5.4.0-31.35 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-115.116 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1080.84 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-aws-5.3 | 5.3.0-1032.34~18.04.2 | USN-4440-1 |
| Ubuntu 18.04 LTS | linux-aws-5.4 +2 | 5.4.0-1022.22~18.04.1 | USN-4483-1 |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1093.103 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-azure-5.3 | 5.3.0-1034.35~18.04.1 | USN-4440-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1023.23~18.04.1 | USN-4483-1 |
| Ubuntu 18.04 LTS | linux-gcp +6 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1081.92 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-gcp-5.3 +1 | 5.3.0-1032.34~18.04.1 | USN-4440-1 |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1067.70 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-gke-5.0 | 5.0.0-1045.46 | USN-4439-1 |
| Ubuntu 18.04 LTS | linux-hwe | 5.3.0-64.58~18.04.1 | USN-4440-1 |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-45.49~18.04.2 | USN-4483-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1072.73 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1094.104 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1065.70 | USN-4439-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1051.55 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-oracle-5.3 | 5.3.0-1030.32~18.04.1 | USN-4440-1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1016.17~18.04.1 | USN-4483-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1068.72 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-raspi2-5.3 | 5.3.0-1030.32~18.04.2 | USN-4440-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1084.92 | USN-4485-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-186.216 | USN-4427-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1111.123 | USN-4427-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1080.84~16.04.1 | USN-4485-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1093.103~16.04.1 | USN-4485-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1081.92~16.04.1 | USN-4485-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-115.116~16.04.1 | USN-4485-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1077.84 | USN-4427-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1051.55~16.04.1 | USN-4485-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1136.145 | USN-4427-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1140.148 | USN-4427-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1069.73+fips2 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1073.76+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1067.71~20.04.1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2025.25 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2007.8 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1039.44 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1043.48 | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1075.79 | USN-4427-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1093.103~14.04.1 | USN-4485-1 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-186.216~14.04.1 | USN-4427-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-193.13.2.rt13.65.el8_2 | RHSA-2020:3016 |
| RHEL 8 | kpatch-patch-4_18_0-193 | 1-5.el8 | RHSA-2020:3073 |
| RHEL 8 | kpatch-patch-4_18_0-193_1_2 | 1-3.el8_2 | RHSA-2020:3073 |
| RHEL 8 | kpatch-patch-4_18_0-193_6_3 | 1-2.el8_2 | RHSA-2020:3073 |
| RHEL 8 | perf +26 | 4.18.0-193.13.2.el8_2 | RHSA-2020:3010 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147 | 1-16.el8 | RHSA-2020:3297 |
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147_0_2 +1 | 1-12.el8 | RHSA-2020:3297 |
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147_13_2 | 1-3.el8_1 | RHSA-2020:3297 |
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147_20_1 | 1-2.el8_1 | RHSA-2020:3297 |
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147_3_1 | 1-12.el8_1 | RHSA-2020:3297 |
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147_5_1 | 1-7.el8_1 | RHSA-2020:3297 |
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147_8_1 | 1-5.el8_1 | RHSA-2020:3297 |
| RHEL 8.1 EUS | perf +26 | 4.18.0-147.24.2.el8_1 | RHSA-2020:3222 |
| RHEL 8.0 E4S | perf +18 | 4.18.0-80.27.1.el8_0 | RHSA-2020:3041 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | kernel-azure +2 | 5.3.18-18.5.1 | SUSE-SU-2020:2027-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-24.9.1.9.2.6 | SUSE-SU-2020:2105-1 |
| SLES 15 SP2 | kernel-docs | 5.3.18-24.9.2 | SUSE-SU-2020:2105-1 |
| SLES 15 SP2 | kernel-syms +4 | 5.3.18-24.9.1 | SUSE-SU-2020:2105-1 |
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.38.1 | SUSE-SU-2020:2103-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.48.1 | SUSE-SU-2020:2107-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.55.1 | SUSE-SU-2020:2106-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.19.1 | SUSE-SU-2020:1699-1 |
| SLES 12 SP5 | kernel-docs | 4.12.14-122.26.2 | SUSE-SU-2020:1693-1 |
| SLES 12 SP5 | kernel-syms +3 | 4.12.14-122.26.1 | SUSE-SU-2020:1693-1 |
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
Show 23 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.124.1 | SUSE-SU-2020:1713-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_33 | 1-4.3.1 | SUSE-SU-2020:1713-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.138.1 | SUSE-SU-2020:2134-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_36 | 1-3.3.1 | SUSE-SU-2020:2134-1 |
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150.55.1 | SUSE-SU-2020:2106-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.19.1 | SUSE-SU-2020:1699-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.26.1 | SUSE-SU-2020:1693-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.124.1 | SUSE-SU-2020:1713-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_33 | 1-4.3.1 | SUSE-SU-2020:1713-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.138.1 | SUSE-SU-2020:2134-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_36 | 1-3.3.1 | SUSE-SU-2020:2134-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.13.1 | SUSE-SU-2020:2478-1 |
| SLE Real Time 12 SP4 | kernel-rt +3 | 4.12.14-8.23.1 | SUSE-SU-2020:2156-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-24.9.1 | SUSE-SU-2020:2105-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_1 | 1-5.3.6 | SUSE-SU-2020:2105-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.48.1 | SUSE-SU-2020:2107-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_13 | 1-3.3.1 | SUSE-SU-2020:2107-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.55.1 | SUSE-SU-2020:2106-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_19 | 1-1.3.1 | SUSE-SU-2020:2106-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.26.1 | SUSE-SU-2020:1693-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_6 | 1-8.3.1 | SUSE-SU-2020:1693-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_15 | 1-6.3.1 | SUSE-SU-2020:2121-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150.55.1 | SUSE-SU-2020:2106-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.28.1 | SUSE-SU-2020:2487-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.124.1 | SUSE-SU-2020:1713-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_33 | 1-4.3.1 | SUSE-SU-2020:1713-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.124.1 | SUSE-SU-2020:1713-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_33 | 1-4.3.1 | SUSE-SU-2020:1713-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.138.1 | SUSE-SU-2020:2134-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_36 | 1-3.3.1 | SUSE-SU-2020:2134-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.124.1 | SUSE-SU-2020:1713-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_33 | 1-4.3.1 | SUSE-SU-2020:1713-1 |
| SUSE Enterprise Storage 5 | kernel-syms +2 | 4.4.180-94.124.1 | SUSE-SU-2020:1713-1 |
| SUSE Enterprise Storage 5 | kgraft-patch-SLE12-SP3_Update_33 | 1-4.3.1 | SUSE-SU-2020:1713-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 5.14.6-1.4 | openSUSE-SU-2024:13704-1, openSUSE-SU-2024:10728-1 |
| openSUSE Leap 15.2 | kernel-default-base | 5.3.18-lp152.26.2.lp152.8.2.2 | openSUSE-SU-2020:0935-1 |
| openSUSE Leap 15.2 | kernel-docs +8 | 5.3.18-lp152.26.2 | openSUSE-SU-2020:0935-1 |
| openSUSE Leap 15.2 | kernel-rt +3 | 5.3.18-lp152.3.5.1 | openSUSE-SU-2021:0242-1 |
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.59.1 | openSUSE-SU-2020:1153-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.186-146.268 | 1.0-0.amzn2 | ALAS2-2020-1465 |
| Amazon Linux 2 | perf +8 | 4.14.186-146.268.amzn2 | ALAS2-2020-1465 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-193.13.2.el8_2 | ELSA-2020-3010 |
| Oracle Linux 7 | perf +10 | 4.14.35-1902.305.4.el7uek | ELSA-2020-5805, ELSA-2020-5804 |
Advisories 36
- RHSA-2020:3297 Red Hat Security Advisory: kpatch-patch security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:3222 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:3073 Red Hat Security Advisory: kpatch-patch security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:3041 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:3016 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:3010 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-4440-1 linux-hwe, linux-aws-5.3, linux-azure-5.3, linux-gcp-5.3, linux-gke-5.3, linux-hwe, linux-oracle-5.3, linux-raspi2-5.3 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4439-1 linux-gke-5.0, linux-oem-osp1 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4485-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4427-1 linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4483-1 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DLA-2323-1 linux-4.19 - new package Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:2105-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1153-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0242-1 Security update for RT kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13704-1 kernel-devel-longterm-6.6.17-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2156-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2487-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2107-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1699-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2121-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0935-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2478-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2103-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1693-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1713-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2134-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10728-1 kernel-devel-5.14.6-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2027-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2106-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ICSA-24-074-07 Siemens SIMATIC CISA ICS & IT advisories · Mar 14, 2024
- SSA-770721 SSA-770721: Multiple Vulnerabilities in SIMATIC RF160B before V2.2 Siemens ProductCERT · Mar 12, 2024
- ALAS2-2020-1465 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 17, 2023
- ELSA-2020-5805 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 10, 2020
- ELSA-2020-5804 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 10, 2020
- ELSA-2020-3010 Important: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 24, 2020