# CVE-2021-0920: bpftool: af_unix: fix garbage collect vs MSG_PEEK (Patrick Talbert) [2031974 2031975]

CVE-2021-0920 is fixed in 52 products on 1 platform, first by DEBIAN-CVE-2021-0920, released December 15, 2021. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on May 23, 2022. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/cve/CVE-2021-0920
- Priority: Patch now
- CVSS: 8.8 (IMPORTANT)
- EPSS: 0.0087
- CISA KEV: listed May 23, 2022, federal due date Jun 13, 2022
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 15, 2021

## Description

af_unix: fix garbage collect vs MSG_PEEK (Patrick Talbert) [2031974 2031975]

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | bpftool ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel rocky 8 | 0:4.18.0-348.20.1.el8_5 | [RLSA-2022:0825](https://patchblox.com/security/data/fix/linux/rlsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-abi-stablelists RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-abi-stablelists ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-core RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-core ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-cross-headers ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-debug RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-debug ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-debug-core RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-debug-core ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-debug-devel RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-debug-devel ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-debug-modules RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-debug-modules ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-debug-modules-extra RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-debug-modules-extra ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-devel RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-devel ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-doc RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-doc ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-headers ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-modules RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-modules ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-modules-extra RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-modules-extra ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-rt RHEL 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RHSA-2022:0819](https://patchblox.com/security/data/fix/linux/rhsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-rt rocky 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RLSA-2022:0819](https://patchblox.com/security/data/fix/linux/rlsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-rt-core RHEL 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RHSA-2022:0819](https://patchblox.com/security/data/fix/linux/rhsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-rt-debug RHEL 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RHSA-2022:0819](https://patchblox.com/security/data/fix/linux/rhsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-rt-debug-core RHEL 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RHSA-2022:0819](https://patchblox.com/security/data/fix/linux/rhsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-rt-debug-devel RHEL 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RHSA-2022:0819](https://patchblox.com/security/data/fix/linux/rhsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-rt-debug-kvm RHEL 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RHSA-2022:0819](https://patchblox.com/security/data/fix/linux/rhsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-rt-debug-modules RHEL 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RHSA-2022:0819](https://patchblox.com/security/data/fix/linux/rhsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-rt-debug-modules-extra RHEL 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RHSA-2022:0819](https://patchblox.com/security/data/fix/linux/rhsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-rt-devel RHEL 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RHSA-2022:0819](https://patchblox.com/security/data/fix/linux/rhsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-rt-kvm RHEL 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RHSA-2022:0819](https://patchblox.com/security/data/fix/linux/rhsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-rt-modules RHEL 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RHSA-2022:0819](https://patchblox.com/security/data/fix/linux/rhsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-rt-modules-extra RHEL 8 | 0:4.18.0-348.20.1.rt7.150.el8_5 | [RHSA-2022:0819](https://patchblox.com/security/data/fix/linux/rhsa-2022-0819.md) | Mar 10, 2022 |
| Linux | kernel-tools RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-tools ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-tools-libs RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-tools-libs ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-tools-libs-devel RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-tools-libs-devel almalinux 8 | 4.18.0-348.20.1.el8_5 | [ALSA-2022:0825](https://patchblox.com/security/data/fix/linux/alsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-tools-libs-devel ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |
| Linux | kernel-uek ol 8 | 0:5.4.17-2136.302.7.2.el8uek | [ELSA-2022-9012](https://patchblox.com/security/data/fix/linux/elsa-2022-9012.md) | Jan 10, 2022 |
| Linux | kernel-uek-container ol 8 | 0:5.4.17-2136.302.7.2.el8 | [ELSA-2022-9013](https://patchblox.com/security/data/fix/linux/elsa-2022-9013.md) | Jan 10, 2022 |
| Linux | kernel-uek-container-debug ol 8 | 0:5.4.17-2136.302.7.2.el8 | [ELSA-2022-9013](https://patchblox.com/security/data/fix/linux/elsa-2022-9013.md) | Jan 10, 2022 |
| Linux | kernel-uek-debug ol 8 | 0:5.4.17-2136.302.7.2.el8uek | [ELSA-2022-9012](https://patchblox.com/security/data/fix/linux/elsa-2022-9012.md) | Jan 10, 2022 |
| Linux | kernel-uek-debug-devel ol 8 | 0:5.4.17-2136.302.7.2.el8uek | [ELSA-2022-9012](https://patchblox.com/security/data/fix/linux/elsa-2022-9012.md) | Jan 10, 2022 |
| Linux | kernel-uek-devel ol 8 | 0:5.4.17-2136.302.7.2.el8uek | [ELSA-2022-9012](https://patchblox.com/security/data/fix/linux/elsa-2022-9012.md) | Jan 10, 2022 |
| Linux | kernel-uek-doc ol 8 | 0:5.4.17-2136.302.7.2.el8uek | [ELSA-2022-9012](https://patchblox.com/security/data/fix/linux/elsa-2022-9012.md) | Jan 10, 2022 |
| Linux | kernel-uek-tools ol 8 | 0:5.4.17-2136.302.7.2.el7uek | [ELSA-2022-9012](https://patchblox.com/security/data/fix/linux/elsa-2022-9012.md) | Jan 10, 2022 |
| Linux | kernel-uek-tools-libs ol 8 | 0:5.4.17-2136.302.7.2.el7uek | [ELSA-2022-9012](https://patchblox.com/security/data/fix/linux/elsa-2022-9012.md) | Jan 10, 2022 |
| Linux | kernel-zfcpdump RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-zfcpdump-core RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-zfcpdump-devel RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-zfcpdump-modules RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kernel-zfcpdump-modules-extra RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | kpatch-patch-4_18_0-348 RHEL 8 | 0:1-3.el8 | [RHSA-2022:0849](https://patchblox.com/security/data/fix/linux/rhsa-2022-0849.md) | Mar 14, 2022 |
| Linux | kpatch-patch-4_18_0-348_12_2 RHEL 8 | 0:1-1.el8_5 | [RHSA-2022:0849](https://patchblox.com/security/data/fix/linux/rhsa-2022-0849.md) | Mar 14, 2022 |
| Linux | kpatch-patch-4_18_0-348_2_1 RHEL 8 | 0:1-2.el8_5 | [RHSA-2022:0849](https://patchblox.com/security/data/fix/linux/rhsa-2022-0849.md) | Mar 14, 2022 |
| Linux | kpatch-patch-4_18_0-348_7_1 RHEL 8 | 0:1-2.el8_5 | [RHSA-2022:0849](https://patchblox.com/security/data/fix/linux/rhsa-2022-0849.md) | Mar 14, 2022 |
| Linux | linux Debian 12.15 (bookworm) | 5.14.6-1 | [DEBIAN-CVE-2021-0920](https://patchblox.com/security/data/fix/linux/debian-cve-2021-0920.md) | Dec 15, 2021 |
| Linux | linux Debian 13.5 (trixie) | 5.14.6-1 | [DEBIAN-CVE-2021-0920](https://patchblox.com/security/data/fix/linux/debian-cve-2021-0920.md) | Dec 15, 2021 |
| Linux | linux Debian 14 | 5.14.6-1 | [DEBIAN-CVE-2021-0920](https://patchblox.com/security/data/fix/linux/debian-cve-2021-0920.md) | Dec 15, 2021 |
| Linux | perf RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | perf ol 8 | 0:5.4.17-2136.302.7.2.el7uek | [ELSA-2022-9012](https://patchblox.com/security/data/fix/linux/elsa-2022-9012.md) | Jan 10, 2022 |
| Linux | python-perf ol 8 | 0:5.4.17-2136.302.7.2.el7uek | [ELSA-2022-9012](https://patchblox.com/security/data/fix/linux/elsa-2022-9012.md) | Jan 10, 2022 |
| Linux | python3-perf RHEL 8 | 0:4.18.0-348.20.1.el8_5 | [RHSA-2022:0825](https://patchblox.com/security/data/fix/linux/rhsa-2022-0825.md) | Mar 10, 2022 |
| Linux | python3-perf ol 8 | 0:4.18.0-348.20.1.el8_5 | [ELSA-2022-0825](https://patchblox.com/security/data/fix/linux/elsa-2022-0825.md) | Mar 11, 2022 |

---

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