Security update for the Linux Kernel (Live Patch 5 for SLE 15 SP3) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2021:3742-1 Final 1 1 2021-11-19T14:36:16Z current 2021-11-19T14:36:16Z 2021-11-19T14:36:16Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 5 for SLE 15 SP3) This update for the Linux Kernel 5.3.18-59_19 fixes several issues. The following security issues were fixed: - CVE-2021-34866: Fixed possible eBPF Type Confusion privilege escalation vulnerability via eBPF type confusion (bsc#1191646). - CVE-2021-41864: Fixed an integer overflow with a resultant out-of-bounds write in prealloc_elems_and_freelist in kernel/bpf/stackmap.c (bsc#1191318). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2021-3742,SUSE-SLE-Module-Live-Patching-15-SP3-2021-3739,SUSE-SLE-Module-Live-Patching-15-SP3-2021-3740,SUSE-SLE-Module-Live-Patching-15-SP3-2021-3741,SUSE-SLE-Module-Live-Patching-15-SP3-2021-3742 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2021/suse-su-20213742-1/ Link for SUSE-SU-2021:3742-1 https://lists.suse.com/pipermail/sle-security-updates/2021-November/009753.html E-Mail link for SUSE-SU-2021:3742-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1191318 SUSE Bug 1191318 https://bugzilla.suse.com/1191646 SUSE Bug 1191646 https://www.suse.com/security/cve/CVE-2021-34866/ SUSE CVE CVE-2021-34866 page https://www.suse.com/security/cve/CVE-2021-41864/ SUSE CVE CVE-2021-41864 page SUSE Linux Enterprise Live Patching 15 SP3 kernel-livepatch-5_3_18-59_19-default-4-2.2 kernel-livepatch-5_3_18-59_19-preempt-4-2.2 kernel-livepatch-5_3_18-59_5-default-6-2.2 kernel-livepatch-5_3_18-59_10-default-6-2.2 kernel-livepatch-5_3_18-59_16-default-5-2.2 kernel-livepatch-5_3_18-59_5-default-6-2.2 as a component of SUSE Linux Enterprise Live Patching 15 SP3 kernel-livepatch-5_3_18-59_10-default-6-2.2 as a component of SUSE Linux Enterprise Live Patching 15 SP3 kernel-livepatch-5_3_18-59_16-default-5-2.2 as a component of SUSE Linux Enterprise Live Patching 15 SP3 kernel-livepatch-5_3_18-59_19-default-4-2.2 as a component of SUSE Linux Enterprise Live Patching 15 SP3 This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.14-rc3. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs, which can result in a type confusion condition. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-14689. CVE-2021-34866 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_10-default-6-2.2 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_16-default-5-2.2 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_19-default-4-2.2 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_5-default-6-2.2 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2021/suse-su-20213742-1/ https://www.suse.com/security/cve/CVE-2021-34866.html CVE-2021-34866 https://bugzilla.suse.com/1191645 SUSE Bug 1191645 https://bugzilla.suse.com/1191646 SUSE Bug 1191646 prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds write. CVE-2021-41864 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_10-default-6-2.2 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_16-default-5-2.2 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_19-default-4-2.2 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_5-default-6-2.2 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2021/suse-su-20213742-1/ https://www.suse.com/security/cve/CVE-2021-41864.html CVE-2021-41864 https://bugzilla.suse.com/1191317 SUSE Bug 1191317 https://bugzilla.suse.com/1191318 SUSE Bug 1191318