# CVE-2021-3543: bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: u...

CVE-2021-3543 is fixed in 37 products on 1 platform, first by RHSA-2021:2168, released June 1, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-3543
- Priority: Routine
- CVSS: 6.7 (Important)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 1, 2021

## Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run (CVE-2021-3501)  * kernel: nitro_enclaves stale file descriptors on failed usercopy (CVE-2021-3543)  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):  * OVS mistakenly using local IP as tun_dst for VXLAN packets (?) (BZ#1944667)  * Selinux: The task calling security_set_bools() deadlocks with itself when it later calls  selinux_audit_rule_match(). (BZ#1945123)  * [mlx5] tc flower mpls match options does not work (BZ#1952061)  * mlx5: missing patches for ct.rel (BZ#1952062)  * CT HWOL: with OVN/OVS, intermittently, load balancer hairpin TCP packets get dropped for seconds in a row (BZ#1952065)  * [Lenovo 8.3 bug] Blackscreen after clicking on "Settings" icon from top-right corner. (BZ#1952900)  * RHEL 8.x missing uio upstream fix. (BZ#1952952)  * Turbostat doesn't show any measured data on AMD Milan (BZ#1952987)  * P620 no sound from front headset jack (BZ#1954545)  * RHEL kernel 8.2 and higher are affected by data corruption bug in raid1 arrays using bitmaps. (BZ#1955188)  * [net/sched] connection failed with DNAT + SNAT by tc action ct (BZ#1956458)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | bpftool ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-abi-stablelists RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-abi-stablelists ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-core RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-core ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-cross-headers ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-debug RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-debug ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-debug-core RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-debug-core ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-debug-devel RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-debug-devel ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-debug-modules RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-debug-modules ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-debug-modules-extra RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-debug-modules-extra ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-devel RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-devel ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-doc RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-doc ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-headers ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-modules RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-modules ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-modules-extra RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-modules-extra ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-rt RHEL 8 | 0:4.18.0-305.3.1.rt7.75.el8_4 | [RHSA-2021:2169](https://patchblox.com/security/data/fix/linux/rhsa-2021-2169.md) | Jun 1, 2021 |
| Linux | kernel-rt-core RHEL 8 | 0:4.18.0-305.3.1.rt7.75.el8_4 | [RHSA-2021:2169](https://patchblox.com/security/data/fix/linux/rhsa-2021-2169.md) | Jun 1, 2021 |
| Linux | kernel-rt-debug RHEL 8 | 0:4.18.0-305.3.1.rt7.75.el8_4 | [RHSA-2021:2169](https://patchblox.com/security/data/fix/linux/rhsa-2021-2169.md) | Jun 1, 2021 |
| Linux | kernel-rt-debug-core RHEL 8 | 0:4.18.0-305.3.1.rt7.75.el8_4 | [RHSA-2021:2169](https://patchblox.com/security/data/fix/linux/rhsa-2021-2169.md) | Jun 1, 2021 |
| Linux | kernel-rt-debug-devel RHEL 8 | 0:4.18.0-305.3.1.rt7.75.el8_4 | [RHSA-2021:2169](https://patchblox.com/security/data/fix/linux/rhsa-2021-2169.md) | Jun 1, 2021 |
| Linux | kernel-rt-debug-kvm RHEL 8 | 0:4.18.0-305.3.1.rt7.75.el8_4 | [RHSA-2021:2169](https://patchblox.com/security/data/fix/linux/rhsa-2021-2169.md) | Jun 1, 2021 |
| Linux | kernel-rt-debug-modules RHEL 8 | 0:4.18.0-305.3.1.rt7.75.el8_4 | [RHSA-2021:2169](https://patchblox.com/security/data/fix/linux/rhsa-2021-2169.md) | Jun 1, 2021 |
| Linux | kernel-rt-debug-modules-extra RHEL 8 | 0:4.18.0-305.3.1.rt7.75.el8_4 | [RHSA-2021:2169](https://patchblox.com/security/data/fix/linux/rhsa-2021-2169.md) | Jun 1, 2021 |
| Linux | kernel-rt-devel RHEL 8 | 0:4.18.0-305.3.1.rt7.75.el8_4 | [RHSA-2021:2169](https://patchblox.com/security/data/fix/linux/rhsa-2021-2169.md) | Jun 1, 2021 |
| Linux | kernel-rt-kvm RHEL 8 | 0:4.18.0-305.3.1.rt7.75.el8_4 | [RHSA-2021:2169](https://patchblox.com/security/data/fix/linux/rhsa-2021-2169.md) | Jun 1, 2021 |
| Linux | kernel-rt-modules RHEL 8 | 0:4.18.0-305.3.1.rt7.75.el8_4 | [RHSA-2021:2169](https://patchblox.com/security/data/fix/linux/rhsa-2021-2169.md) | Jun 1, 2021 |
| Linux | kernel-rt-modules-extra RHEL 8 | 0:4.18.0-305.3.1.rt7.75.el8_4 | [RHSA-2021:2169](https://patchblox.com/security/data/fix/linux/rhsa-2021-2169.md) | Jun 1, 2021 |
| Linux | kernel-tools RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-tools ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-tools-libs RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-tools-libs ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-tools-libs-devel RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-tools-libs-devel ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | kernel-zfcpdump RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-zfcpdump-core RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-zfcpdump-devel RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-zfcpdump-modules RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | kernel-zfcpdump-modules-extra RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | perf RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | perf ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |
| Linux | python3-perf RHEL 8 | 0:4.18.0-305.3.1.el8_4 | [RHSA-2021:2168](https://patchblox.com/security/data/fix/linux/rhsa-2021-2168.md) | Jun 1, 2021 |
| Linux | python3-perf ol 8 | 0:4.18.0-305.3.1.el8_4 | [ELSA-2021-2168](https://patchblox.com/security/data/fix/linux/elsa-2021-2168.md) | Jun 2, 2021 |

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