Security update for the Linux Kernel (Live Patch 24 for SLE 15) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2021:3371-1 Final 1 1 2021-10-12T12:04:25Z current 2021-10-12T12:04:25Z 2021-10-12T12:04:25Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 24 for SLE 15) This update for the Linux Kernel 4.12.14-150_72 fixes several issues. The following security issues were fixed: - CVE-2021-3715: Fixed a user-after-free in the Linux kernel's Traffic Control networking subsystem which could lead to local privilege escalation. (bsc#1190350). - CVE-2021-38160: Fixed a bug that could lead to a data corruption or loss. This can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size in drivers/char/virtio_console.c (bsc#1190118) - CVE-2021-3640: Fixed a user-after-free bug in the function sco_sock_sendmsg which could lead to local privilege escalation. (bsc#1188613) - CVE-2021-3573: Fixed a user-after-free bug in the function hci_sock_bound_ioctl which could lead to local privilege escalation. (bsc#1187054). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2021-3371,SUSE-SLE-Module-Live-Patching-15-2021-3371,SUSE-SLE-Module-Live-Patching-15-2021-3372 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-20213371-1/ Link for SUSE-SU-2021:3371-1 https://lists.suse.com/pipermail/sle-security-updates/2021-October/009573.html E-Mail link for SUSE-SU-2021:3371-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1187054 SUSE Bug 1187054 https://bugzilla.suse.com/1188613 SUSE Bug 1188613 https://bugzilla.suse.com/1190118 SUSE Bug 1190118 https://bugzilla.suse.com/1190350 SUSE Bug 1190350 https://www.suse.com/security/cve/CVE-2021-3573/ SUSE CVE CVE-2021-3573 page https://www.suse.com/security/cve/CVE-2021-3640/ SUSE CVE CVE-2021-3640 page https://www.suse.com/security/cve/CVE-2021-3715/ SUSE CVE CVE-2021-3715 page https://www.suse.com/security/cve/CVE-2021-38160/ SUSE CVE CVE-2021-38160 page SUSE Linux Enterprise Live Patching 15 kernel-livepatch-4_12_14-150_75-default-4-2.1 kernel-livepatch-4_12_14-150_72-default-7-2.1 kernel-livepatch-4_12_14-150_75-default-4-2.1 as a component of SUSE Linux Enterprise Live Patching 15 kernel-livepatch-4_12_14-150_72-default-7-2.1 as a component of SUSE Linux Enterprise Live Patching 15 A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system. This flaw affects the Linux kernel versions prior to 5.13-rc5. CVE-2021-3573 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-150_72-default-7-2.1 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-150_75-default-4-2.1 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-20213371-1/ https://www.suse.com/security/cve/CVE-2021-3573.html CVE-2021-3573 https://bugzilla.suse.com/1186666 SUSE Bug 1186666 https://bugzilla.suse.com/1187054 SUSE Bug 1187054 https://bugzilla.suse.com/1188172 SUSE Bug 1188172 A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system. CVE-2021-3640 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-150_72-default-7-2.1 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-150_75-default-4-2.1 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-20213371-1/ https://www.suse.com/security/cve/CVE-2021-3640.html CVE-2021-3640 https://bugzilla.suse.com/1188172 SUSE Bug 1188172 https://bugzilla.suse.com/1188613 SUSE Bug 1188613 https://bugzilla.suse.com/1191530 SUSE Bug 1191530 https://bugzilla.suse.com/1196810 SUSE Bug 1196810 https://bugzilla.suse.com/1196914 SUSE Bug 1196914 A flaw was found in the "Routing decision" classifier in the Linux kernel's Traffic Control networking subsystem in the way it handled changing of classification filters, leading to a use-after-free condition. This flaw allows unprivileged local users to escalate their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. CVE-2021-3715 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-150_72-default-7-2.1 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-150_75-default-4-2.1 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-20213371-1/ https://www.suse.com/security/cve/CVE-2021-3715.html CVE-2021-3715 https://bugzilla.suse.com/1190349 SUSE Bug 1190349 https://bugzilla.suse.com/1190350 SUSE Bug 1190350 https://bugzilla.suse.com/1196722 SUSE Bug 1196722 ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE: the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the length validation was added solely for robustness in the face of anomalous host OS behavior. CVE-2021-38160 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-150_72-default-7-2.1 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-150_75-default-4-2.1 moderate 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-20213371-1/ https://www.suse.com/security/cve/CVE-2021-38160.html CVE-2021-38160 https://bugzilla.suse.com/1190117 SUSE Bug 1190117 https://bugzilla.suse.com/1190118 SUSE Bug 1190118 https://bugzilla.suse.com/1196914 SUSE Bug 1196914