{"id":"ALSA-2021:2570","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: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)\n\n* kernel: security bypass in certs/blacklist.c and certs/system_keyring.c (CVE-2020-26541)\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* [ESXi][AlmaLinux-8] VMXNET3 v4 causes invalid checksums of inner packets of VXLAN tunnel (BZ#1960702)\n\n* fnic crash from invalid request pointer (BZ#1961705)\n\n* GFS2: Failed FS thaw call makes the entire snapshot failed. (BZ#1961849)\n\n* dm writecache: fix performance degradation in ssd mode (BZ#1962241)\n\n* Kernel BUG with act_ct and IP fragments (BZ#1963940)\n\n* core: backports from upstream (BZ#1963952)\n\n* Hibernate resume on AlmaLinux fails in Amazon EC2 C5.18xlarge instance (BZ#1964930)\n\n* [SanityOnly] panic caused by i40e_msix_clean_rings (BZ#1964962)\n\n* tc reclassification limit is too low for OVN (BZ#1965148)\n\n* tc action ct nat src addr does not work while used with ct nat dst addr together (BZ#1965150)\n\n* CNB: Rebase/update TC subsystem for AlmaLinux 8.5 (BZ#1965457)\n\n* sctp: crash due to use after free of sctp_transport structure (BZ#1965632)","modified":"2026-02-04T04:07:06.517458Z","published":"2021-06-29T13:42:37Z","related":["CVE-2020-26541","CVE-2021-33034"],"references":[{"type":"REPORT","url":"https://vulners.com/cve/CVE-2020-26541"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-33034"}],"affected":[{"package":{"name":"kernel-tools-libs-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-tools-libs-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.7.1.el8_4"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:2570.json"}}],"schema_version":"1.7.3"}