# CVE-2020-0466: kernel-rt: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high...

CVE-2020-0466 is fixed in 37 products on 1 platform, first by RHSA-2021:1093, released April 6, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-0466
- Priority: High
- CVSS: 7.8 (Important)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 6, 2021

## Description

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.  Security Fix(es):  * kernel: use after free in eventpoll.c may lead to escalation of privilege (CVE-2020-0466)  * kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)  * kernel: Use after free via PI futex state (CVE-2021-3347)  * kernel: race conditions caused by wrong locking in net/vmw_vsock/af_vsock.c (CVE-2021-26708)  * kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)  * kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)  * Kernel: KVM: host stack overflow due to lazy update IOAPIC (CVE-2020-27152)  * kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.  Bug Fix(es):  * kernel-rt possible livelock: WARNING: CPU: 28 PID: 3109 at kernel/ptrace.c:242 ptrace_check_attach+0xdd/0x1a0 (BZ#1925308)  * kernel-rt: update RT source tree to the RHEL-8.3.z3 source tree (BZ#1926369)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | bpftool ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-abi-whitelists RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-abi-whitelists ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-core RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-core ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-cross-headers ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-debug RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-debug ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-debug-core RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-debug-core ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-debug-devel RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-debug-devel ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-debug-modules RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-debug-modules ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-debug-modules-extra RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-debug-modules-extra ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-devel RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-devel ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-doc RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-doc ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-headers ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-modules RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-modules ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-modules-extra RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-modules-extra ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-rt RHEL 8 | 0:4.18.0-240.22.1.rt7.77.el8_3 | [RHSA-2021:1081](https://patchblox.com/security/data/fix/linux/rhsa-2021-1081.md) | Apr 6, 2021 |
| Linux | kernel-rt-core RHEL 8 | 0:4.18.0-240.22.1.rt7.77.el8_3 | [RHSA-2021:1081](https://patchblox.com/security/data/fix/linux/rhsa-2021-1081.md) | Apr 6, 2021 |
| Linux | kernel-rt-debug RHEL 8 | 0:4.18.0-240.22.1.rt7.77.el8_3 | [RHSA-2021:1081](https://patchblox.com/security/data/fix/linux/rhsa-2021-1081.md) | Apr 6, 2021 |
| Linux | kernel-rt-debug-core RHEL 8 | 0:4.18.0-240.22.1.rt7.77.el8_3 | [RHSA-2021:1081](https://patchblox.com/security/data/fix/linux/rhsa-2021-1081.md) | Apr 6, 2021 |
| Linux | kernel-rt-debug-devel RHEL 8 | 0:4.18.0-240.22.1.rt7.77.el8_3 | [RHSA-2021:1081](https://patchblox.com/security/data/fix/linux/rhsa-2021-1081.md) | Apr 6, 2021 |
| Linux | kernel-rt-debug-kvm RHEL 8 | 0:4.18.0-240.22.1.rt7.77.el8_3 | [RHSA-2021:1081](https://patchblox.com/security/data/fix/linux/rhsa-2021-1081.md) | Apr 6, 2021 |
| Linux | kernel-rt-debug-modules RHEL 8 | 0:4.18.0-240.22.1.rt7.77.el8_3 | [RHSA-2021:1081](https://patchblox.com/security/data/fix/linux/rhsa-2021-1081.md) | Apr 6, 2021 |
| Linux | kernel-rt-debug-modules-extra RHEL 8 | 0:4.18.0-240.22.1.rt7.77.el8_3 | [RHSA-2021:1081](https://patchblox.com/security/data/fix/linux/rhsa-2021-1081.md) | Apr 6, 2021 |
| Linux | kernel-rt-devel RHEL 8 | 0:4.18.0-240.22.1.rt7.77.el8_3 | [RHSA-2021:1081](https://patchblox.com/security/data/fix/linux/rhsa-2021-1081.md) | Apr 6, 2021 |
| Linux | kernel-rt-kvm RHEL 8 | 0:4.18.0-240.22.1.rt7.77.el8_3 | [RHSA-2021:1081](https://patchblox.com/security/data/fix/linux/rhsa-2021-1081.md) | Apr 6, 2021 |
| Linux | kernel-rt-modules RHEL 8 | 0:4.18.0-240.22.1.rt7.77.el8_3 | [RHSA-2021:1081](https://patchblox.com/security/data/fix/linux/rhsa-2021-1081.md) | Apr 6, 2021 |
| Linux | kernel-rt-modules-extra RHEL 8 | 0:4.18.0-240.22.1.rt7.77.el8_3 | [RHSA-2021:1081](https://patchblox.com/security/data/fix/linux/rhsa-2021-1081.md) | Apr 6, 2021 |
| Linux | kernel-tools RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-tools ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-tools-libs RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-tools-libs ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-tools-libs-devel RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-tools-libs-devel ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | kernel-zfcpdump RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-zfcpdump-core RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-zfcpdump-devel RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-zfcpdump-modules RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | kernel-zfcpdump-modules-extra RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | perf RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | perf ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |
| Linux | python3-perf RHEL 8 | 0:4.18.0-240.22.1.el8_3 | [RHSA-2021:1093](https://patchblox.com/security/data/fix/linux/rhsa-2021-1093.md) | Apr 6, 2021 |
| Linux | python3-perf ol 8 | 0:4.18.0-240.22.1.el8_3 | [ELSA-2021-1093](https://patchblox.com/security/data/fix/linux/elsa-2021-1093.md) | Apr 7, 2021 |

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