{"id":"RLSA-2026:21706","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: Bluetooth: MGMT: Fix possible UAFs (CVE-2025-39981)\n\n* kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr (CVE-2025-68183)\n\n* kernel: ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events (CVE-2025-68347)\n\n* kernel: libceph: make decode_pool() more resilient against corrupted osdmaps (CVE-2025-71116)\n\n* kernel: Linux kernel: Denial of service and memory corruption in RDMA umad (CVE-2026-23243)\n\n* kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation (CVE-2026-23270)\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: can: raw: fix ro-\u003euniq use-after-free in raw_rcv() (CVE-2026-31532)\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: md/bitmap: fix GPF in write_page caused by resize race (CVE-2026-43163)\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\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":"2026-05-31T00:30:04.904865289Z","published":"2026-05-31T00:00:16.377043Z","upstream":["CVE-2025-39981","CVE-2025-68183","CVE-2025-68347","CVE-2025-71116","CVE-2026-23243","CVE-2026-23270","CVE-2026-23455","CVE-2026-31408","CVE-2026-31532","CVE-2026-31684","CVE-2026-31685","CVE-2026-31709","CVE-2026-43020","CVE-2026-43027","CVE-2026-43051","CVE-2026-43158","CVE-2026-43163","CVE-2026-43190"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:21706"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2404105"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2422699"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2424879"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2429602"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2448594"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2448745"},{"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=2461107"},{"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=2467059"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467064"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467210"}],"affected":[{"package":{"name":"kernel","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/kernel?distro=rocky-linux-8&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-553.126.1.el8_10"}],"database_specific":{"yum_repository":"BaseOS"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:21706.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"}]}