{"id":"RLSA-2021:2168","summary":"Important: kernel security and bug fix update","details":"The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu-\u003erun (CVE-2021-3501)\n\n* kernel: nitro_enclaves stale file descriptors on failed usercopy (CVE-2021-3543)\n\nFor 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.\n\nBug Fix(es):\n\n* OVS mistakenly using local IP as tun_dst for VXLAN packets (?) (BZ#1944667)\n\n* Selinux: The task calling security_set_bools() deadlocks with itself when it later calls  selinux_audit_rule_match(). (BZ#1945123)\n\n* [mlx5] tc flower mpls match options does not work (BZ#1952061)\n\n* mlx5: missing patches for ct.rel (BZ#1952062)\n\n* CT HWOL: with OVN/OVS, intermittently, load balancer hairpin TCP packets get dropped for seconds in a row (BZ#1952065)\n\n* [Lenovo 8.3 bug] Blackscreen after clicking on \"Settings\" icon from top-right corner. (BZ#1952900)\n\n* Rocky Linux 8.x missing uio upstream fix. (BZ#1952952)\n\n* Turbostat doesn't show any measured data on AMD Milan (BZ#1952987)\n\n* P620 no sound from front headset jack (BZ#1954545)\n\n* Rocky Linux kernel 8.2 and higher are affected by data corruption bug in raid1 arrays using bitmaps. (BZ#1955188)\n\n* [net/sched] connection failed with DNAT + SNAT by tc action ct (BZ#1956458)","modified":"2026-03-10T20:30:10.785954Z","published":"2021-06-01T09:02:01Z","upstream":["CVE-2021-3501","CVE-2021-3543"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2021:2168"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1950136"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1953022"}],"affected":[{"package":{"name":"kernel","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/kernel?distro=rocky-linux-8-4-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-305.3.1.el8_4"}],"database_specific":{"yum_repository":"BaseOS"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:2168.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}