{"id":"ALSA-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  * kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr (CVE-2025-68183)\n  * kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)\n  * kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)\n  * kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)\n  * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)\n  * kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)\n  * kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold (CVE-2026-31408)\n  * kernel: net: sched: act_csum: validate nested VLAN headers (CVE-2026-31684)\n  * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)\n  * kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup (CVE-2026-43027)\n  * kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)\n  * kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq (CVE-2026-43051)\n  * kernel: smb: client: validate the whole DACL before rewriting it in cifsacl (CVE-2026-31709)\n  * kernel: Bluetooth: SCO: fix race conditions in sco_sock_connect() (CVE-2026-43023)\n  * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)\n  * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)\n  * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)\n  * kernel: mm/page_alloc: clear page-\u003eprivate in free_pages_prepare() (CVE-2026-43303)\n\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","modified":"2026-06-07T23:29:11.383122997Z","published":"2026-05-28T00:00:00Z","related":["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://access.redhat.com/errata/RHSA-2026:21556"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2025-38653"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2025-68183"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2025-68366"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2025-68724"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2025-71089"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-23392"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-23455"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-31408"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-31684"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-31685"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-31709"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-43020"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-43023"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-43027"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-43051"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-43110"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-43158"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-43190"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-43303"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2390372"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2422699"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2424881"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2424886"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2429104"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2451218"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2454810"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2455334"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2461757"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2461759"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2464369"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2464455"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2464462"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2464476"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2464496"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2467014"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2467064"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2467210"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2468091"},{"type":"ADVISORY","url":"https://errata.almalinux.org/9/ALSA-2026-21556.html"}],"affected":[{"package":{"name":"kernel","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.0-687.12.1.el9_8"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:21556.json"}},{"package":{"name":"kernel-64k","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/kernel-64k"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.0-687.12.1.el9_8"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:21556.json"}},{"package":{"name":"kernel-64k-core","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/kernel-64k-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.0-687.12.1.el9_8"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:21556.json"}},{"package":{"name":"kernel-64k-debug","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/kernel-64k-debug"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.0-687.12.1.el9_8"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:21556.json"}},{"package":{"name":"kernel-64k-debug-core","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/kernel-64k-debug-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.0-687.12.1.el9_8"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:21556.json"}},{"package":{"name":"kernel-64k-debug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