# CVE-2021-3609: bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: r... CVE-2021-3609 is fixed in 52 products on 1 platform, first by RHSA-2021:3057, released August 10, 2021. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2021-3609 - Priority: High - CVSS: 7.0 (Important) - EPSS: 0.0043 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Aug 10, 2021 ## Description The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: race condition in net/can/bcm.c leads to local privilege escalation (CVE-2021-3609) * kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543) * kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555) 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): * Urgent: Missing dptf_power.ko module in RHEL8 (BZ#1968381) * [mlx5] kdump over NFS fails: mlx5 driver gives error "Stop room 95 is bigger than the SQ size 64" (BZ#1969909) * BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 in bluetooth hci_error_reset on intel-tigerlake-h01 (BZ#1972564) * Update CIFS to kernel 5.10 (BZ#1973637) * Backport "tick/nohz: Conditionally restart tick on idle exit" to RHEL 8.5 (BZ#1978710) * Significant performance drop starting on kernel-4.18.0-277 visible on mmap benchmark (BZ#1980314) * Inaccessible NFS server overloads clients (native_queued_spin_lock_slowpath connotation?) (BZ#1980613) * [RHEL8.4 BUG],RialtoMLK, I915 graphic driver failed to boot with one new 120HZ panel (BZ#1981250) * act_ct: subject to DNAT tuple collision (BZ#1982494) Enhancement(s): * [Lenovo 8.5 FEAT] drivers/nvme - Update to the latest upstream (BZ#1965415) ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | bpftool ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-abi-stablelists RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-abi-stablelists ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-core RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-core ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-cross-headers ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-debug RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-debug ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-debug-core RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-debug-core ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-debug-devel RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-debug-devel ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-debug-modules RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-debug-modules ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-debug-modules-extra RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-debug-modules-extra ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-devel RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-devel ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-doc RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-doc ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-headers ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-modules RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-modules ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-modules-extra RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-modules-extra ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-rt RHEL 8 | 0:4.18.0-305.12.1.rt7.84.el8_4 | [RHSA-2021:3088](https://patchblox.com/security/data/fix/linux/rhsa-2021-3088.md) | Aug 10, 2021 | | Linux | kernel-rt-core RHEL 8 | 0:4.18.0-305.12.1.rt7.84.el8_4 | [RHSA-2021:3088](https://patchblox.com/security/data/fix/linux/rhsa-2021-3088.md) | Aug 10, 2021 | | Linux | kernel-rt-debug RHEL 8 | 0:4.18.0-305.12.1.rt7.84.el8_4 | [RHSA-2021:3088](https://patchblox.com/security/data/fix/linux/rhsa-2021-3088.md) | Aug 10, 2021 | | Linux | kernel-rt-debug-core RHEL 8 | 0:4.18.0-305.12.1.rt7.84.el8_4 | [RHSA-2021:3088](https://patchblox.com/security/data/fix/linux/rhsa-2021-3088.md) | Aug 10, 2021 | | Linux | kernel-rt-debug-devel RHEL 8 | 0:4.18.0-305.12.1.rt7.84.el8_4 | [RHSA-2021:3088](https://patchblox.com/security/data/fix/linux/rhsa-2021-3088.md) | Aug 10, 2021 | | Linux | kernel-rt-debug-kvm RHEL 8 | 0:4.18.0-305.12.1.rt7.84.el8_4 | [RHSA-2021:3088](https://patchblox.com/security/data/fix/linux/rhsa-2021-3088.md) | Aug 10, 2021 | | Linux | kernel-rt-debug-modules RHEL 8 | 0:4.18.0-305.12.1.rt7.84.el8_4 | [RHSA-2021:3088](https://patchblox.com/security/data/fix/linux/rhsa-2021-3088.md) | Aug 10, 2021 | | Linux | kernel-rt-debug-modules-extra RHEL 8 | 0:4.18.0-305.12.1.rt7.84.el8_4 | [RHSA-2021:3088](https://patchblox.com/security/data/fix/linux/rhsa-2021-3088.md) | Aug 10, 2021 | | Linux | kernel-rt-devel RHEL 8 | 0:4.18.0-305.12.1.rt7.84.el8_4 | [RHSA-2021:3088](https://patchblox.com/security/data/fix/linux/rhsa-2021-3088.md) | Aug 10, 2021 | | Linux | kernel-rt-kvm RHEL 8 | 0:4.18.0-305.12.1.rt7.84.el8_4 | [RHSA-2021:3088](https://patchblox.com/security/data/fix/linux/rhsa-2021-3088.md) | Aug 10, 2021 | | Linux | kernel-rt-modules RHEL 8 | 0:4.18.0-305.12.1.rt7.84.el8_4 | [RHSA-2021:3088](https://patchblox.com/security/data/fix/linux/rhsa-2021-3088.md) | Aug 10, 2021 | | Linux | kernel-rt-modules-extra RHEL 8 | 0:4.18.0-305.12.1.rt7.84.el8_4 | [RHSA-2021:3088](https://patchblox.com/security/data/fix/linux/rhsa-2021-3088.md) | Aug 10, 2021 | | Linux | kernel-tools RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-tools ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-tools-libs RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-tools-libs ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-tools-libs-devel RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-tools-libs-devel ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | kernel-uek ol 8 | 0:5.4.17-2102.205.7.2.el8uek | [ELSA-2021-9450](https://patchblox.com/security/data/fix/linux/elsa-2021-9450.md) | Sep 16, 2021 | | Linux | kernel-uek-container ol 8 | 0:5.4.17-2102.205.7.2.el8 | [ELSA-2021-9451](https://patchblox.com/security/data/fix/linux/elsa-2021-9451.md) | Sep 16, 2021 | | Linux | kernel-uek-container-debug ol 8 | 0:5.4.17-2102.205.7.2.el8 | [ELSA-2021-9451](https://patchblox.com/security/data/fix/linux/elsa-2021-9451.md) | Sep 16, 2021 | | Linux | kernel-uek-debug ol 8 | 0:5.4.17-2102.205.7.2.el8uek | [ELSA-2021-9450](https://patchblox.com/security/data/fix/linux/elsa-2021-9450.md) | Sep 16, 2021 | | Linux | kernel-uek-debug-devel ol 8 | 0:5.4.17-2102.205.7.2.el8uek | [ELSA-2021-9450](https://patchblox.com/security/data/fix/linux/elsa-2021-9450.md) | Sep 16, 2021 | | Linux | kernel-uek-devel ol 8 | 0:5.4.17-2102.205.7.2.el8uek | [ELSA-2021-9450](https://patchblox.com/security/data/fix/linux/elsa-2021-9450.md) | Sep 16, 2021 | | Linux | kernel-uek-doc ol 8 | 0:5.4.17-2102.205.7.2.el8uek | [ELSA-2021-9450](https://patchblox.com/security/data/fix/linux/elsa-2021-9450.md) | Sep 16, 2021 | | Linux | kernel-uek-tools ol 8 | 0:5.4.17-2102.205.7.2.el7uek | [ELSA-2021-9450](https://patchblox.com/security/data/fix/linux/elsa-2021-9450.md) | Sep 16, 2021 | | Linux | kernel-uek-tools-libs ol 8 | 0:5.4.17-2102.205.7.2.el7uek | [ELSA-2021-9450](https://patchblox.com/security/data/fix/linux/elsa-2021-9450.md) | Sep 16, 2021 | | Linux | kernel-zfcpdump RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-zfcpdump-core RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-zfcpdump-devel RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-zfcpdump-modules RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kernel-zfcpdump-modules-extra RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | kpatch-patch-4_18_0-305 RHEL 8 | 0:1-4.el8 | [RHSA-2021:3044](https://patchblox.com/security/data/fix/linux/rhsa-2021-3044.md) | Aug 10, 2021 | | Linux | kpatch-patch-4_18_0-305_10_2 RHEL 8 | 0:1-1.el8_4 | [RHSA-2021:3044](https://patchblox.com/security/data/fix/linux/rhsa-2021-3044.md) | Aug 10, 2021 | | Linux | kpatch-patch-4_18_0-305_3_1 RHEL 8 | 0:1-3.el8_4 | [RHSA-2021:3044](https://patchblox.com/security/data/fix/linux/rhsa-2021-3044.md) | Aug 10, 2021 | | Linux | kpatch-patch-4_18_0-305_7_1 RHEL 8 | 0:1-2.el8_4 | [RHSA-2021:3044](https://patchblox.com/security/data/fix/linux/rhsa-2021-3044.md) | Aug 10, 2021 | | Linux | linux Debian 12.15 (bookworm) | 5.10.46-1 | [DEBIAN-CVE-2021-3609](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3609.md) | Mar 3, 2022 | | Linux | linux Debian 13.5 (trixie) | 5.10.46-1 | [DEBIAN-CVE-2021-3609](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3609.md) | Mar 3, 2022 | | Linux | linux Debian 14 | 5.10.46-1 | [DEBIAN-CVE-2021-3609](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3609.md) | Mar 3, 2022 | | Linux | perf RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | perf ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | | Linux | python-perf ol 8 | 0:5.4.17-2102.205.7.2.el7uek | [ELSA-2021-9450](https://patchblox.com/security/data/fix/linux/elsa-2021-9450.md) | Sep 16, 2021 | | Linux | python3-perf RHEL 8 | 0:4.18.0-305.12.1.el8_4 | [RHSA-2021:3057](https://patchblox.com/security/data/fix/linux/rhsa-2021-3057.md) | Aug 10, 2021 | | Linux | python3-perf ol 8 | 0:4.18.0-305.12.1.el8_4 | [ELSA-2021-3057](https://patchblox.com/security/data/fix/linux/elsa-2021-3057.md) | Aug 11, 2021 | --- Data as of 2026-11-08T06:59:42Z UTC. 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