Description
The Linux kernel through 5.7.11 allows remote attackers to make observations that help to obtain sensitive information about the internal state of the network RNG, aka CID-f227e3ec3b5c. This is related to drivers/char/random.c and kernel/time/timer.c.
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 | 5.7.17-1 | — |
| Debian 13 | linux | 5.7.17-1 | — |
| Debian 12 | linux | 5.7.17-1 | — |
| Debian 9 | linux | 4.9.240-1 | DLA-2420-1 |
| Debian 9 | linux-4.19 | 4.19.146-1~deb9u1 | DLA-2385-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-realtime +1 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-48.52 | USN-4525-1 |
| Ubuntu 20.04 LTS | linux-aws +2 | 5.4.0-1025.25 | USN-4525-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1026.26 | USN-4525-1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1024.24 | USN-4525-1 |
| Ubuntu 20.04 LTS | linux-oem-5.6 | 5.6.0-1031.32 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1019.21 | USN-4525-1 |
| Ubuntu 20.04 LTS | linux-raspi2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv | 5.4.0-34.38 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-118.119 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1083.87 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-aws-5.4 +2 | 5.4.0-1025.25~18.04.1 | USN-4525-1 |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1096.106 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1026.26~18.04.1 | USN-4525-1 |
| Ubuntu 18.04 LTS | linux-gcp +11 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1084.95 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1070.73 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-48.52~18.04.1 | USN-4525-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1075.76 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1097.107 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1054.58 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1019.21~18.04.1 | USN-4525-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1071.75 | USN-4526-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1087.95 | USN-4526-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1083.87~16.04.1 | USN-4526-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1096.106~16.04.1 | USN-4526-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1084.95~16.04.1 | USN-4526-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-118.119~16.04.1 | USN-4526-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1054.58~16.04.1 | USN-4526-1 |
Show 5 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-fips +3 | 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 | 4.15.0-2027.27 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2009.10 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1041.46 | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1096.106~14.04.1 | USN-4526-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-240.8.1.rt7.62.el8_3 | RHSA-2020:5506 |
| RHEL 8 | perf +26 | 4.18.0-240.8.1.el8_3 | RHSA-2020:5473 |
| RHEL 7 | perf +13 | 4.14.0-115.32.1.el7a | RHSA-2020:4279 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.2 EUS | kernel-rt +12 | 4.18.0-193.37.1.rt13.87.el8_2 | RHSA-2020:5428 |
| RHEL 8.2 EUS | perf +27 | 4.18.0-193.37.1.el8_2 | RHSA-2020:5418 |
| RHEL 8.1 EUS | kernel +18 | 4.18.0-147.38.1.el8_1 | RHSA-2021:0184 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | kernel-azure +2 | 5.3.18-18.15.1 | SUSE-SU-2020:2485-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-24.12.1.9.4.1 | SUSE-SU-2020:2486-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-24.12.1 | SUSE-SU-2020:2486-1 |
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.41.1 | SUSE-SU-2020:2541-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.56.1 | SUSE-SU-2020:2575-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.58.1 | SUSE-SU-2020:2610-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.25.1 | SUSE-SU-2020:2540-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.37.1 | SUSE-SU-2020:2574-1 |
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.60.1 | SUSE-SU-2020:2623-1 |
Show 22 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.130.1 | SUSE-SU-2020:2582-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_35 | 1-4.3.1 | SUSE-SU-2020:2582-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.141.1 | SUSE-SU-2020:2576-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_37 | 1-3.3.1 | SUSE-SU-2020:2576-1 |
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150.58.1 | SUSE-SU-2020:2610-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.25.1 | SUSE-SU-2020:2540-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.37.1 | SUSE-SU-2020:2574-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.60.1 | SUSE-SU-2020:2623-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.130.1 | SUSE-SU-2020:2582-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_35 | 1-4.3.1 | SUSE-SU-2020:2582-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.141.1 | SUSE-SU-2020:2576-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_37 | 1-3.3.1 | SUSE-SU-2020:2576-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.16.1 | SUSE-SU-2020:2605-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-24.12.1 | SUSE-SU-2020:2486-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_2 | 1-5.3.1 | SUSE-SU-2020:2486-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.56.1 | SUSE-SU-2020:2575-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_15 | 1-3.3.2 | SUSE-SU-2020:2575-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.58.1 | SUSE-SU-2020:2610-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_20 | 1-1.3.1 | SUSE-SU-2020:2610-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.37.1 | SUSE-SU-2020:2574-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_9 | 1-8.5.1 | SUSE-SU-2020:2574-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.60.1 | SUSE-SU-2020:2623-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_16 | 1-6.3.1 | SUSE-SU-2020:2623-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150.58.1 | SUSE-SU-2020:2610-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.31.1 | SUSE-SU-2020:2631-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.60.1 | SUSE-SU-2020:2623-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.130.1 | SUSE-SU-2020:2582-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_35 | 1-4.3.1 | SUSE-SU-2020:2582-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.60.1 | SUSE-SU-2020:2623-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.130.1 | SUSE-SU-2020:2582-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_35 | 1-4.3.1 | SUSE-SU-2020:2582-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.141.1 | SUSE-SU-2020:2576-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_37 | 1-3.3.1 | SUSE-SU-2020:2576-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.130.1 | SUSE-SU-2020:2582-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_35 | 1-4.3.1 | SUSE-SU-2020:2582-1 |
| SUSE Enterprise Storage 5 | kernel-syms +2 | 4.4.180-94.130.1 | SUSE-SU-2020:2582-1 |
| SUSE Enterprise Storage 5 | kgraft-patch-SLE12-SP3_Update_35 | 1-4.3.1 | SUSE-SU-2020:2582-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | bbswitch | 0.8-lp152.6.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | crash | 7.2.8-lp152.3.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | dpdk | 19.11.1-lp152.2.5.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | drbd | 9.0.22~1+git.fe2b5983-lp152.2.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | hdjmod | 1.28-lp152.6.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | kernel-docs +8 | 5.3.18-lp152.36.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | kernel-rt +3 | 5.3.18-lp152.3.5.1 | openSUSE-SU-2021:0242-1 |
| openSUSE Leap 15.2 | mhvtl | 1.62-lp152.2.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | openafs | 1.8.5-lp152.2.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | pcfclock | 0.44-lp152.4.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | rtl8812au | 5.6.4.2+git20200318.49e98ff-lp152.2.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | sysdig | 0.26.5-lp152.3.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | v4l2loopback | 0.12.5-lp152.2.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | vhba-kmp | 20200106-lp152.2.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | virtualbox | 6.1.10-lp152.2.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.2 | xtables-addons | 3.9-lp152.2.2.1 | openSUSE-SU-2020:1236-1 |
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.59.1 | openSUSE-SU-2020:1153-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-240.8.1.el8_3 | ELSA-2020-5473 |
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.45.6.el7uek | ELSA-2020-5962, ELSA-2020-5885, ELSA-2020-5848 |
| Oracle Linux 7 | perf +5 | 4.14.35-1902.306.2.el7uek | ELSA-2020-5885, ELSA-2020-5848, ELSA-2020-5845 |
Advisories 31
- RHSA-2021:0184 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2020:5506 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:5473 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:5428 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:5418 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:4279 Red Hat Security Advisory: kernel-alt security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-4526-1 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-4525-1 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-2385-1 linux-4.19 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2420-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 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
- SUSE-SU-2020:2605-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1236-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2540-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2631-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2582-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2575-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2485-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2486-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2576-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2610-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2623-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2541-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2574-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2020-5473 Moderate: kernel security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Dec 17, 2020
- ELSA-2020-5962 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 2, 2020
- ELSA-2020-5885 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 12, 2020
- ELSA-2020-5848 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 14, 2020
- ELSA-2020-5844 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 11, 2020
- ELSA-2020-5845 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 11, 2020
References
- https://github.com/torvalds/linux/commit/f227e3ec3b5cad859ad15666874405e8c1bbc1d4
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f227e3ec3b5cad859ad15666874405e8c1bbc1d4
- openSUSE-SU-2020:1153 vendor-advisory
- FEDORA-2020-8d634e31c0 vendor-advisory
- FEDORA-2020-2cd6393548 vendor-advisory
- openSUSE-SU-2020:1236 vendor-advisory
- USN-4526-1 vendor-advisory
- USN-4525-1 vendor-advisory
- [debian-lts-announce] 20200928 [SECURITY] [DLA 2385-1] linux-4.19 security update mailing-list
- [debian-lts-announce] 20201030 [SECURITY] [DLA 2420-1] linux security update mailing-list
- [debian-lts-announce] 20201031 [SECURITY] [DLA 2420-2] linux regression update mailing-list
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://security.netapp.com/advisory/ntap-20200814-0004/
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c51f8f88d705e06bd696d7510aff22b33eb8e638
- https://arxiv.org/pdf/2012.07432.pdf