# CVE-2020-29661: bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: l... CVE-2020-29661 is fixed in 37 products on 1 platform, first by RHSA-2021:0558, released February 16, 2021. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2020-29661 - Priority: High - CVSS: 7.8 (Important) - EPSS: 0.0112 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Feb 16, 2021 ## Description The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661) * kernel: performance counters race condition use-after-free (CVE-2020-14351) * kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705) 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): * Final fixes + drop alpha_support flag requirement for Tigerlake (BZ#1882620) * OVS complains Invalid Argument on TCP packets going into conntrack (BZ#1892744) * BUG: using smp_processor_id() in preemptible [00000000] code: handler106/3082 (BZ#1893281) * Icelake performance - add intel_idle: Customize IceLake server support to RHEL-8 (BZ#1897183) * [mlx5] IPV6 TOS rewrite flows are not getting offloaded in HW (BZ#1897688) * RHEL 8.3 SAS - multipathd fails to re-establish paths during controller random reset (BZ#1900112) * RHEL8.3 Beta - RHEL8.3 hangs on dbginfo.sh execution, crash dump generated (mm-) (BZ#1903019) * Win10 guest automatic reboot after migration in Win10 and WSL2 on AMD hosts (BZ#1905084) * block, dm: fix IO splitting for stacked devices (BZ#1905136) * Failed to hotplug scsi-hd disks (BZ#1905214) * PCI quirk needed to prevent GPU hang (BZ#1906516) * RHEL8.2 - various patches to stabilize the OPAL error log processing and the powernv dump processing (ESS) (BZ#1907301) * pmtu not working with tunnels as bridge ports and br_netfilter loaded (BZ#1907576) * [ThinkPad X13/T14/T14s AMD]: Kdump failed (BZ#1907775) * NFSv4 client improperly handles interrupted slots (BZ#1908312) * NFSv4.1 client ignores ERR_DELAY during LOCK recovery, could lead to data corruption (BZ#1908313) * [Regression] RHEL8.2 - [kernel 148.el8] cpu (sys) time regression in SAP HANA 2.0 benchmark benchInsertSubSelectPerformance (BZ#1908519) * RHEL8: kernel-rt: kernel BUG at kernel/sched/deadline.c:1462! (BZ#1908731) * SEV VM hang at efi_mokvar_sysfs_init+0xa9/0x19d during boot (BZ#1909243) * C6gn support requires "Ensure dirty bit is preserved across pte_wrprotect" patch (BZ#1909577) * [Lenovo 8.3 & 8.4 Bug] [Regression] No response from keyboard and mouse when boot from tboot kernel (BZ#1911555) * Kernel crash with krb5p (BZ#1912478) * [RHEL8] Need additional backports for FIPS 800-90A DRBG entropy seeding source (BZ#1912872) * [Hyper-V][RHEL-8] Request to included a commit that adds a timeout to vmbus_wait_for_unload (BZ#1913528) * Host becomes unresponsive during stress-ng --cyclic test rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (BZ#1913964) * RHEL8.4: Backport upstream RCU patches up to v5.6 (BZ#1915638) * Missing mm backport to fix regression introduced by another mm backport (BZ#1915814) * [Hyper-V][RHEL-8]video: hyperv_fb: Fix the cache type when mapping the VRAM Edit (BZ#1917711) * ionic 0000:39:00.0 ens2: IONIC_CMD_Q_INIT (40) failed: IONIC_RC_ERROR (-5) (BZ#1918372) * [certification] mlx5_core depends on tls triggering TAINT_TECH_PREVIEW even if no ConnectX-6 card is present (BZ#1918743) * kvm-rhel8.3 [AMD] - system crash observed while powering on virtual machine with attached VF interfaces. (BZ#1919885) Enhancement(s): * [Mellanox 8.4 FEAT] mlx5: Add messages when VF-LAG fails to start (BZ#1892344) ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | bpftool ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-abi-whitelists RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-abi-whitelists ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-core RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-core ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-cross-headers ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-debug RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-debug ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-debug-core RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-debug-core ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-debug-devel RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-debug-devel ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-debug-modules RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-debug-modules ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-debug-modules-extra RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-debug-modules-extra ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-devel RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-devel ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-doc RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-doc ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-headers ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-modules RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-modules ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-modules-extra RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-modules-extra ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-rt RHEL 8 | 0:4.18.0-240.15.1.rt7.69.el8_3 | [RHSA-2021:0537](https://patchblox.com/security/data/fix/linux/rhsa-2021-0537.md) | Feb 16, 2021 | | Linux | kernel-rt-core RHEL 8 | 0:4.18.0-240.15.1.rt7.69.el8_3 | [RHSA-2021:0537](https://patchblox.com/security/data/fix/linux/rhsa-2021-0537.md) | Feb 16, 2021 | | Linux | kernel-rt-debug RHEL 8 | 0:4.18.0-240.15.1.rt7.69.el8_3 | [RHSA-2021:0537](https://patchblox.com/security/data/fix/linux/rhsa-2021-0537.md) | Feb 16, 2021 | | Linux | kernel-rt-debug-core RHEL 8 | 0:4.18.0-240.15.1.rt7.69.el8_3 | [RHSA-2021:0537](https://patchblox.com/security/data/fix/linux/rhsa-2021-0537.md) | Feb 16, 2021 | | Linux | kernel-rt-debug-devel RHEL 8 | 0:4.18.0-240.15.1.rt7.69.el8_3 | [RHSA-2021:0537](https://patchblox.com/security/data/fix/linux/rhsa-2021-0537.md) | Feb 16, 2021 | | Linux | kernel-rt-debug-kvm RHEL 8 | 0:4.18.0-240.15.1.rt7.69.el8_3 | [RHSA-2021:0537](https://patchblox.com/security/data/fix/linux/rhsa-2021-0537.md) | Feb 16, 2021 | | Linux | kernel-rt-debug-modules RHEL 8 | 0:4.18.0-240.15.1.rt7.69.el8_3 | [RHSA-2021:0537](https://patchblox.com/security/data/fix/linux/rhsa-2021-0537.md) | Feb 16, 2021 | | Linux | kernel-rt-debug-modules-extra RHEL 8 | 0:4.18.0-240.15.1.rt7.69.el8_3 | [RHSA-2021:0537](https://patchblox.com/security/data/fix/linux/rhsa-2021-0537.md) | Feb 16, 2021 | | Linux | kernel-rt-devel RHEL 8 | 0:4.18.0-240.15.1.rt7.69.el8_3 | [RHSA-2021:0537](https://patchblox.com/security/data/fix/linux/rhsa-2021-0537.md) | Feb 16, 2021 | | Linux | kernel-rt-kvm RHEL 8 | 0:4.18.0-240.15.1.rt7.69.el8_3 | [RHSA-2021:0537](https://patchblox.com/security/data/fix/linux/rhsa-2021-0537.md) | Feb 16, 2021 | | Linux | kernel-rt-modules RHEL 8 | 0:4.18.0-240.15.1.rt7.69.el8_3 | [RHSA-2021:0537](https://patchblox.com/security/data/fix/linux/rhsa-2021-0537.md) | Feb 16, 2021 | | Linux | kernel-rt-modules-extra RHEL 8 | 0:4.18.0-240.15.1.rt7.69.el8_3 | [RHSA-2021:0537](https://patchblox.com/security/data/fix/linux/rhsa-2021-0537.md) | Feb 16, 2021 | | Linux | kernel-tools RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-tools ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-tools-libs RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-tools-libs ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-tools-libs-devel RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-tools-libs-devel ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | kernel-zfcpdump RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-zfcpdump-core RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-zfcpdump-devel RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-zfcpdump-modules RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | kernel-zfcpdump-modules-extra RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | perf RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | perf ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | | Linux | python3-perf RHEL 8 | 0:4.18.0-240.15.1.el8_3 | [RHSA-2021:0558](https://patchblox.com/security/data/fix/linux/rhsa-2021-0558.md) | Feb 16, 2021 | | Linux | python3-perf ol 8 | 0:4.18.0-240.15.1.el8_3 | [ELSA-2021-0558](https://patchblox.com/security/data/fix/linux/elsa-2021-0558.md) | Feb 17, 2021 | --- Data as of 2026-11-08T06:59:42Z UTC. 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