# CVE-2021-20317: kernel-debug: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: I...

CVE-2021-20317 is fixed in 37 products on 1 platform, first by RHSA-2021:4647, released November 15, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-20317
- Priority: High
- CVSS: 8.8 (Important)
- EPSS: 0.0038
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 15, 2021

## Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type (CVE-2021-43267)  * kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317)  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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | bpftool ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel rocky 8 | 0:4.18.0-348.2.1.el8_5 | [RLSA-2021:4647](https://patchblox.com/security/data/fix/linux/rlsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-abi-stablelists RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-abi-stablelists ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-core RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-core ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-cross-headers ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-debug RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-debug ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-debug-core RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-debug-core ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-debug-devel RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-debug-devel ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-debug-modules RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-debug-modules ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-debug-modules-extra RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-debug-modules-extra ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-devel RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-devel ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-doc RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-doc ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-headers ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-modules RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-modules ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-modules-extra RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-modules-extra ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-rt RHEL 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RHSA-2021:4646](https://patchblox.com/security/data/fix/linux/rhsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-rt rocky 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RLSA-2021:4646](https://patchblox.com/security/data/fix/linux/rlsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-rt-core RHEL 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RHSA-2021:4646](https://patchblox.com/security/data/fix/linux/rhsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-rt-debug RHEL 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RHSA-2021:4646](https://patchblox.com/security/data/fix/linux/rhsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-rt-debug-core RHEL 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RHSA-2021:4646](https://patchblox.com/security/data/fix/linux/rhsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-rt-debug-devel RHEL 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RHSA-2021:4646](https://patchblox.com/security/data/fix/linux/rhsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-rt-debug-kvm RHEL 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RHSA-2021:4646](https://patchblox.com/security/data/fix/linux/rhsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-rt-debug-modules RHEL 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RHSA-2021:4646](https://patchblox.com/security/data/fix/linux/rhsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-rt-debug-modules-extra RHEL 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RHSA-2021:4646](https://patchblox.com/security/data/fix/linux/rhsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-rt-devel RHEL 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RHSA-2021:4646](https://patchblox.com/security/data/fix/linux/rhsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-rt-kvm RHEL 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RHSA-2021:4646](https://patchblox.com/security/data/fix/linux/rhsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-rt-modules RHEL 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RHSA-2021:4646](https://patchblox.com/security/data/fix/linux/rhsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-rt-modules-extra RHEL 8 | 0:4.18.0-348.2.1.rt7.132.el8_5 | [RHSA-2021:4646](https://patchblox.com/security/data/fix/linux/rhsa-2021-4646.md) | Nov 15, 2021 |
| Linux | kernel-tools RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-tools ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-tools-libs RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-tools-libs ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-tools-libs-devel RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-tools-libs-devel almalinux 8 | 4.18.0-348.2.1.el8_5 | [ALSA-2021:4647](https://patchblox.com/security/data/fix/linux/alsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-tools-libs-devel ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | kernel-zfcpdump RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-zfcpdump-core RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-zfcpdump-devel RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-zfcpdump-modules RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | kernel-zfcpdump-modules-extra RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | perf RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | perf ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |
| Linux | python3-perf RHEL 8 | 0:4.18.0-348.2.1.el8_5 | [RHSA-2021:4647](https://patchblox.com/security/data/fix/linux/rhsa-2021-4647.md) | Nov 15, 2021 |
| Linux | python3-perf ol 8 | 0:4.18.0-348.2.1.el8_5 | [ELSA-2021-4647](https://patchblox.com/security/data/fix/linux/elsa-2021-4647.md) | Nov 18, 2021 |

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