{"id":"CLSA-2026-1787571818","summary":"kernel: Fix of 13 CVEs","details":"- mpls: Use in6_dev_rcu() and dev_net_rcu() in mpls_forward() and mpls_xmit().\n- net: l3mdev: use skb_dst_dev_rcu() in l3mdev_l3_out()\n- ipv4: start using dst_dev_rcu()\n- tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check() {CVE-2025-68188}\n- tcp_metrics: use dst_dev_net_rcu() {CVE-2025-40075}\n- net: use dst_dev_rcu() in sk_setup_caps() {CVE-2025-40170}\n- udp6: Fix race condition in udp6_sendmsg & connect\n- ipv6: use RCU in ip6_output() {CVE-2025-40158}\n- ipv6: use RCU in ip6_xmit() {CVE-2025-40135}\n- ipv6: start using dst_dev_rcu()\n- net: dst: introduce dst-\u003edev_rcu\n- neighbour: accept plain RCU readers in ___neigh_lookup_noref() {CVE-2025-40158}\n- net: Add locking to protect skb-\u003edev access in ip_output\n- ipv6: adopt skb_dst_dev() and skb_dst_dev_net[_rcu]() helpers\n- ipv6: adopt dst_dev() helper\n- ipv4: adopt dst_dev, skb_dst_dev and skb_dst_dev_net[_rcu]\n- net: dst: add four helpers to annotate data-races around dst-\u003edev\n- tcp: convert to dev_net_rcu()\n- tcp: fix potential race in tcp_v6_syn_recv_sock() {CVE-2026-43198}\n- ndisc: ndisc_send_redirect() cleanup\n- ndisc: ndisc_send_redirect() must use dev_get_by_index_rcu()\n- ipv4: use RCU protection in ip_dst_mtu_maybe_forward()\n- ipv6: icmp: convert to dev_net_rcu()\n- ipv4: icmp: convert to dev_net_rcu()\n- ipv4: use RCU protection in __ip_rt_update_pmtu() {CVE-2025-21766}\n- ipv6: use RCU protection in ip6_default_advmss() {CVE-2025-21765}\n- fix: ndisc: use RCU protection in ndisc_alloc_skb() {CVE-2025-21764}\n- neighbour: use RCU protection in __neigh_notify() {CVE-2025-21763}\n- openvswitch: use RCU protection in ovs_vport_cmd_fill_info() {CVE-2025-21761}\n- ndisc: extend RCU protection in ndisc_send_skb() {CVE-2025-21760}\n- ipv6: mcast: extend RCU protection in igmp6_send() {CVE-2025-21759}\n- ipv6: mcast: add RCU protection to mld_newpack() {CVE-2025-21758}\n- ipv4: use RCU protection in rt_is_expired()\n- ipv4: use RCU protection in inet_select_addr()\n- ipv4: add RCU protection to ip4_dst_hoplimit()\n- flow_dissector: use RCU protection to fetch dev_net()\n- net: add dev_net_rcu() helper\n- net: treat possible_net_t net pointer as an RCU one and add read_pnet_rcu()\n- Revert \"net: add dst_dev_rcu() helper for safe dst-\u003edev access\"\n- Revert \"net: use dst_dev_rcu() in sk_setup_caps() {CVE-2025-40170}\"\n- xen/privcmd: fix double free via VMA splitting {CVE-2026-31787}\n- netfilter: flowtable: fix NAT IPv6 offload mangling\n- nvmet-tcp: fix out-of-bounds access when receiving multiple h2cdata PDUs {CVE-2026-23112}\n- NFSv4: include MAY_WRITE in open permission mask for O_TRUNC {CVE-2026-64298}\n- fuse: re-lock request before returning from fuse_ref_folio() {CVE-2026-64266}\n- drop_monitor: fix size calculations for 64-bit attributes {CVE-2026-68287}\n- sctp: don't free the ASCONF's own transport in DEL-IP processing {CVE-2026-64564}","modified":"2026-10-26T09:43:39.868566423Z","published":"2026-08-24T11:44:03Z","upstream":["CVE-2025-21758","CVE-2025-21759","CVE-2025-21760","CVE-2025-21761","CVE-2025-21763","CVE-2025-21764","CVE-2025-21765","CVE-2025-21766","CVE-2025-40075","CVE-2025-40135","CVE-2025-40158","CVE-2025-40170","CVE-2025-68188","CVE-2026-23112","CVE-2026-31787","CVE-2026-43198","CVE-2026-64266","CVE-2026-64298","CVE-2026-64564","CVE-2026-68287"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/centos8.4els/CLSA-2026-1787571818.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21758"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21759"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21760"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21761"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21763"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21765"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23112"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31787"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43198"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64266"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64298"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64564"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68287"}],"affected":[{"package":{"name":"bpftool","ecosystem":"TuxCare:CentOS:8.4","purl":"pkg:rpm/tuxcare/bpftool?distro=centos-8.4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els47"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1787571818.json"}},{"package":{"name":"kernel","ecosystem":"TuxCare:CentOS:8.4","purl":"pkg:rpm/tuxcare/kernel?distro=centos-8.4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els47"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1787571818.json"}},{"package":{"name":"kernel-core","ecosystem":"TuxCare:CentOS:8.4","purl":"pkg:rpm/tuxcare/kernel-core?distro=centos-8.4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els47"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1787571818.json"}},{"package":{"name":"kernel-cross-headers","ecosystem":"TuxCare:CentOS:8.4","purl":"pkg:rpm/tuxcare/kernel-cross-headers?distro=centos-8.4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els47"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1787571818.json"}},{"package":{"name":"kernel-debug","ecosystem":"TuxCare:CentOS:8.4","purl":"pkg:rpm/tuxcare/kernel-debug?distro=centos-8.4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els47"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1787571818.json"}},{"package":{"name":"kernel-debug-core","ecosystem":"TuxCare:CentOS:8.4","purl":"pkg:rpm/tuxcare/kernel-debug-core?distro=centos-8.4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els47"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1787571818.json"}},{"package":{"name":"kernel-debug-devel","ecosystem":"TuxCare:CentOS:8.4","purl":"pkg:rpm/tuxcare/kernel-debug-devel?distro=centos-8.4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els47"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1787571818.json"}},{"package":{"name":"kernel-debug-modules","ecosystem":"TuxCare:CentOS:8.4","purl":"pkg:rpm/tuxcare/kernel-debug-modules?distro=centos-8.4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els47"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1787571818.json"}},{"package":{"name":"kernel-debug-modules-extra","ecosystem":"TuxCare:CentOS:8.4","purl":"pkg:rpm/tuxcare/kernel-debug-modules-extra?distro=centos-8.4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els47"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1787571818.json"}},{"package":{"name":"kernel-debug-modu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