{"id":"RLSA-2026:21556","summary":"Important: kernel security update","details":"The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al (CVE-2025-38653)\n\n* kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr (CVE-2025-68183)\n\n* kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)\n\n* kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)\n\n* kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)\n\n* kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)\n\n* kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)\n\n* kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold (CVE-2026-31408)\n\n* kernel: net: sched: act_csum: validate nested VLAN headers (CVE-2026-31684)\n\n* kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)\n\n* kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup (CVE-2026-43027)\n\n* kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)\n\n* kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq (CVE-2026-43051)\n\n* kernel: smb: client: validate the whole DACL before rewriting it in cifsacl (CVE-2026-31709)\n\n* kernel: Bluetooth: SCO: fix race conditions in sco_sock_connect() (CVE-2026-43023)\n\n* kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)\n\n* kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)\n\n* kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)\n\n* kernel: mm/page_alloc: clear page-\u003eprivate in free_pages_prepare() (CVE-2026-43303)\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.","modified":"2026-05-30T18:25:45.030463849Z","published":"2026-05-30T18:03:01.190443Z","upstream":["CVE-2025-38653","CVE-2025-68183","CVE-2025-68366","CVE-2025-68724","CVE-2025-71089","CVE-2026-23392","CVE-2026-23455","CVE-2026-31408","CVE-2026-31684","CVE-2026-31685","CVE-2026-31709","CVE-2026-43020","CVE-2026-43023","CVE-2026-43027","CVE-2026-43051","CVE-2026-43110","CVE-2026-43158","CVE-2026-43190","CVE-2026-43303"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:21556"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2390372"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2422699"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2424881"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2424886"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2429104"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451218"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2454810"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2455334"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2461757"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2461759"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2464369"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2464455"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2464462"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2464476"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2464496"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467014"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467064"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467210"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2468091"}],"affected":[{"package":{"name":"kernel","ecosystem":"Rocky Linux:9","purl":"pkg:rpm/rocky-linux/kernel?distro=rocky-linux-9&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:5.14.0-687.12.1.el9_8"}],"database_specific":{"yum_repository":"BaseOS"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:21556.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}