# CVE-2021-47018: bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: p...

CVE-2021-47018 is fixed in 26 products on 1 platform, first by DEBIAN-CVE-2021-47018, released February 28, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47018
- Priority: Routine
- CVSS: 5.5 (important)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 28, 2024

## Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: powerpc: Fix access beyond end of drmem array (CVE-2023-52451) * kernel: efivarfs: force RO when remounting if SetVariable is not supported (CVE-2023-52463) * kernel: tracing: Restructure trace_clock_global() to never block (CVE-2021-46939) * kernel: ext4: avoid online resizing failures due to oversized flex bg (CVE-2023-52622) * kernel: net/sched: flower: Fix chain template offload (CVE-2024-26669) * kernel: stmmac: Clear variable when destroying workqueue (CVE-2024-26802) * kernel: efi: runtime: Fix potential overflow of soft-reserved region size (CVE-2024-26843) * kernel: quota: Fix potential NULL pointer dereference (CVE-2024-26878) * kernel: TIPC message reassembly use-after-free remote code execution vulnerability (CVE-2024-36886) * kernel: SUNRPC: fix a memleak in gss_import_v2_context (CVE-2023-52653) * kernel: dmaengine/idxd: hardware erratum allows potential security problem with direct access by untrusted application (CVE-2024-21823) * kernel: Revert "net/mlx5: Block entering switchdev mode with ns inconsistency" (CVE-2023-52658) * kernel: ext4: fix corruption during on-line resize (CVE-2024-35807) * kernel: x86/fpu: Keep xfd_state in sync with MSR_IA32_XFD (CVE-2024-35801) * kernel: dyndbg: fix old BUG_ON in >control parser (CVE-2024-35947) * kernel: net/sched: act_skbmod: prevent kernel-infoleak (CVE-2024-35893) * kernel: x86/mce: Make sure to grab mce_sysfs_mutex in set_bank() (CVE-2024-35876) * kernel: platform/x86: wmi: Fix opening of char device (CVE-2023-52864) * kernel: tipc: Change nla_policy for bearer-related names to NLA_NUL_STRING (CVE-2023-52845) * (CVE-2023-28746) * (CVE-2023-52847) * (CVE-2021-47548) * (CVE-2024-36921) * (CVE-2024-26921) * (CVE-2021-47579) * (CVE-2024-36927) * (CVE-2024-39276) * (CVE-2024-33621) * (CVE-2024-27010) * (CVE-2024-26960) * (CVE-2024-38596) * (CVE-2022-48743) * (CVE-2024-26733) * (CVE-2024-26586) * (CVE-2024-26698) * (CVE-2023-52619)  Bug Fix(es):  * AlmaLinux8.6 - Spinlock statistics may show negative elapsed time and incorrectly formatted output (JIRA:AlmaLinux-17678) * [AWS][8.9]There are call traces found when booting debug-kernel  for Amazon EC2 r8g.metal-24xl instance (JIRA:AlmaLinux-23841) * [almalinux8] gfs2: Fix glock shrinker (JIRA:AlmaLinux-32941) * lan78xx: Microchip LAN7800 never comes up after unplug and replug (JIRA:AlmaLinux-33437) * [Hyper-V][AlmaLinux-8.10.z] Update hv_netvsc driver to TOT (JIRA:AlmaLinux-39074) * Use-after-free on proc inode-i_sb triggered by fsnotify (JIRA:AlmaLinux-40167) * blk-cgroup: Properly propagate the iostat update up the hierarchy [almalinux-8.10.z] (JIRA:AlmaLinux-40939) * (JIRA:AlmaLinux-31798) * (JIRA:AlmaLinux-10263) * (JIRA:AlmaLinux-40901) * (JIRA:AlmaLinux-43547) * (JIRA:AlmaLinux-34876)  Enhancement(s):  * [RFE] Add module parameters 'soft_reboot_cmd' and 'soft_active_on_boot' for customizing softdog configuration (JIRA:AlmaLinux-19723)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer the CVE page(s) listed in the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | bpftool almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | bpftool ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel rocky 8 | 0:4.18.0-553.16.1.el8_10.cloud.0.1 | [RXSA-2024:5101](https://patchblox.com/security/data/fix/linux/rxsa-2024-5101.md) | Sep 17, 2024 |
| Linux | kernel-abi-stablelists RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-abi-stablelists almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-abi-stablelists ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-core RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-core almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-core ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-cross-headers almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-cross-headers ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug-core RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug-core almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug-core ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug-devel RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug-devel almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug-devel ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug-modules RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug-modules almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug-modules ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug-modules-extra RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug-modules-extra almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-debug-modules-extra ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-devel RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-devel almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-devel ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-doc RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-doc almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-doc ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-headers almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-headers ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-modules RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-modules almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-modules ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-modules-extra RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-modules-extra almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-modules-extra ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-tools RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-tools almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-tools ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-tools-libs RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-tools-libs almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-tools-libs ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-tools-libs-devel RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-tools-libs-devel almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-tools-libs-devel ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-zfcpdump RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-zfcpdump almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-zfcpdump-core RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-zfcpdump-core almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-zfcpdump-devel RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-zfcpdump-devel almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-zfcpdump-modules RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-zfcpdump-modules almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-zfcpdump-modules-extra RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | kernel-zfcpdump-modules-extra almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | linux Debian 12.15 (bookworm) | 5.10.38-1 | [DEBIAN-CVE-2021-47018](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47018.md) | Feb 28, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.10.38-1 | [DEBIAN-CVE-2021-47018](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47018.md) | Feb 28, 2024 |
| Linux | linux Debian 14 | 5.10.38-1 | [DEBIAN-CVE-2021-47018](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47018.md) | Feb 28, 2024 |
| Linux | perf RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | perf almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | perf ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |
| Linux | python3-perf RHEL 8 | 0:4.18.0-553.16.1.el8_10 | [RHSA-2024:5101](https://patchblox.com/security/data/fix/linux/rhsa-2024-5101.md) | Aug 8, 2024 |
| Linux | python3-perf almalinux 8 | 4.18.0-553.16.1.el8_10 | [ALSA-2024:5101](https://patchblox.com/security/data/fix/linux/alsa-2024-5101.md) | Aug 8, 2024 |
| Linux | python3-perf ol 8 | 0:4.18.0-553.16.1.el8_10 | [ELSA-2024-5101](https://patchblox.com/security/data/fix/linux/elsa-2024-5101.md) | Aug 8, 2024 |

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