{"id":"ALSA-2021:1093","summary":"Important: kernel security, bug fix, and enhancement 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 eventpoll.c may lead to escalation of privilege (CVE-2020-0466)\n\n* kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)\n\n* kernel: Use after free via PI futex state (CVE-2021-3347)\n\n* kernel: race conditions caused by wrong locking in net/vmw_vsock/af_vsock.c (CVE-2021-26708)\n\n* kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)\n\n* kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)\n\n* Kernel: KVM: host stack overflow due to lazy update IOAPIC (CVE-2020-27152)\n\n* kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363)\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* race condition when creating child sockets from syncookies (BZ#1915529)\n\n* On System Z, a hash needs state randomized for entropy extraction (BZ#1915816)\n\n* scsi: target: core_tmr_abort_task() reporting multiple aborts for the same se_cmd-\u003etag (BZ#1918354)\n\n* [mlx5] VF interface stats are not reflected in \"ip -s link show\" / \"ifconfig \u003cvf\u003e\" commands (BZ#1921060)\n\n* Win10 guest automatic reboot after migration in Win10 and WSL2 on Intel hosts (BZ#1923281)\n\n* [AlmaLinux 8.3] Repeated messages - Unable to burst-read optrom segment (BZ#1924222)\n\n* Backport bug fix RDMA/umem: Prevent small pages from being returned by ib_umem_find_best_pgsz (BZ#1924691)\n\n* [Cisco 8.3] AlmaLinux/Cent 8.2 fNIC driver needs a patch fix that addresses crash (BZ#1925186)\n\n* AlmaLinux8.3 - The kernel misdetects zCX with z/VM (BZ#1925508)\n\n* Backport 22e4663e91 (\"mm/slub: fix panic in slab_alloc_node()\") (BZ#1925511)\n\n* SCTP \"Address already in use\" when no active endpoints from AlmaLinux 8.2 onwards (BZ#1927521)\n\n* lpfc: Fix initial FLOGI failure due to BBSCN not supported  (BZ#1927921)\n\n* [mm] mm, oom: remove oom_lock from oom_reaper (BZ#1929738)\n\n* Unexpected thread movement with AMD Milan compared to Rome (BZ#1929740)\n\n* rpmbuild cannot build the userspace RPMs in the kernel package when the kernel itself is not built (BZ#1929910)\n\n* [Regression] AlmaLinux8.2 - ISST-LTE:pVM:diapvmlp83:sum:memory DLPAR fails to add memory on multiple trials[mm/memory_hotplug.c:1163] (mm-) (BZ#1930168)\n\n* Configuring the system with non-RT kernel will hang the system (BZ#1930735)\n\n* Upstream Patch for Gracefully handle DMAR units with no supported address widthsx86/vt-d (BZ#1932199)\n\n* gfs2: Deadlock between gfs2_{create_inode,inode_lookup} and delete_work_func (BZ#1937109)\n\n* Failing on tsx-ctrl when the flag doesn't change anything (BZ#1939013)\n\nEnhancement(s):\n\n* RFE: Backport all Audit enhancements and fixes up to version 5.10-rc1 (BZ#1907520)\n\n* AlmaLinux8.4: Update the target driver (BZ#1918363)\n\n* [Mellanox 8.4 FEAT] mlx5: Hairpin Support in Switch Mode (BZ#1924689)","modified":"2026-02-04T04:34:38.693854Z","published":"2021-04-06T13:33:17Z","related":["CVE-2020-0466","CVE-2020-27152","CVE-2020-28374","CVE-2021-26708","CVE-2021-27363","CVE-2021-27364","CVE-2021-27365","CVE-2021-3347"],"references":[{"type":"REPORT","url":"https://vulners.com/cve/CVE-2020-0466"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2020-27152"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2020-28374"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-26708"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-27363"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-27364"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-27365"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-3347"}],"affected":[{"package":{"name":"kernel-abi-whitelists","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-abi-whitelists"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-240.22.1.el8_3"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:1093.json"}},{"package":{"name":"kernel-tools-libs-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-tools-libs-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-240.22.1.el8_3"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:1093.json"}}],"schema_version":"1.7.3"}