{"schema_version": "1.7.0", "id": "RLSA-2026:21745", "modified": "2026-05-31T00:03:55.765768Z", "published": "2026-05-31T00:00:33.739726Z", "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"], "summary": "Important: kernel-rt security update", "details": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\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->uniq 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.", "severity": [{"type": "CVSS_V3", "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}], "affected": [{"package": {"ecosystem": "Rocky Linux:8", "name": "kernel-rt", "purl": "pkg:rpm/rocky-linux/kernel-rt?distro=rocky-linux-8&epoch=0"}, "ranges": [{"type": "ECOSYSTEM", "events": [{"introduced": "0"}, {"fixed": "0:4.18.0-553.126.1.rt7.467.el8_10"}], "database_specific": {"yum_repository": "NFV"}}]}], "references": [{"type": "ADVISORY", "url": "https://errata.rockylinux.org/RLSA-2026:21745"}, {"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"}], "credits": [{"name": "Rocky Enterprise Software Foundation"}, {"name": "Red Hat"}]}