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Oracle Linux 9 : kernel (ELSA-2026-76739)

high Nessus Plugin ID 365481

Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-76739 advisory.

 - nfsd: defer vfree of compound ops to fix rpc_status UAF (Roberto Bergantinos Corpas) [RHEL-264950] {CVE-2026-89690}
 - svcrdma: Reject inline replies that overflow the pull-up buffer (Roberto Bergantinos Corpas) [RHEL-187734] {CVE-2026-89530}
 - nfsd: initialize copy-notify stateid before publishing it (Roberto Bergantinos Corpas) [RHEL-264186] {CVE-2026-89669}
 - nfsd: revoke copy-notify stateids before dropping their reference (Roberto Bergantinos Corpas) [RHEL-264152] {CVE-2026-89663}
 - NFSD: Fix SECINFO_NO_NAME decode error cleanup (Roberto Bergantinos Corpas) [RHEL-259240] {CVE-2026-53398}
 - SUNRPC: pin upper rpc_clnt across the TLS connect_worker (Roberto Bergantinos Corpas) [RHEL-261480] {CVE-2026-72317}
 - ipvlan: inherit needed_headroom and needed_tailroom from phy_dev (Vb Vasu) [RHEL-254246] {CVE-2026-74744}
 - ipvlan: Make the addrs_lock be per port (Vb Vasu) [RHEL-246115] {CVE-2026-23103}
 - vsock/virtio: bind uarg before filling zerocopy skb (Jon Maloy) [RHEL-229027] {CVE-2026-63970}
 - vsock/virtio: fix zerocopy completion for multi-skb sends (Jon Maloy) [RHEL-232843] {CVE-2026-53365}
 - vsock/virtio: fix MSG_ZEROCOPY pinned-pages accounting (Jon Maloy) [RHEL-232843] {CVE-2026-53365}
 - idpf: fix max_vport related crash on allocation error during init (Michal Schmidt) [RHEL-243408] {CVE-2026-68291}
 - idpf: fix double free and use-after-free in aux device error paths (Michal Schmidt) [RHEL-243408] {CVE-2026-53286}
 - idpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init() (Michal Schmidt) [RHEL-243408] {CVE-2026-64162}
 - idpf: fix PREEMPT_RT raw/bh spinlock nesting for async VC handling (Michal Schmidt) [RHEL-243408] {CVE-2026-31647}
 - KVM: SEV: Use READ_ONCE() when reading entries/indices from PSC buffer (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: SEV: Check PSC request indices against the actual size of the buffer (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: SEV: Don't explicitly pass PSC buffer to snp_begin_psc() (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: SEV: WARN if KVM attempts to setup scratch area with min_len==0 (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: SEV: Compute the correct max length of the in-GHCB scratch area (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: SEV: Use the size of the PSC header as the minimum size for PSC requests (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: SEV: Ignore Port I/O requests of length '0' (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: SEV: Reject MMIO requests larger than 8 bytes with GHCB v2+ (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: SVM: Provide helpers to set the error code (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: SVM: Convert plain error code numbers to defines (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: SEV: Ignore MMIO requests of length '0' (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: x86: Consolidate SEV-ES MMIO emulation into a single public API (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: x86: Dedup kvm_sev_es_mmio_{read,write}() (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: x86: Harden SEV-ES MMIO against on-stack use-after-free (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - KVM: SEV: Require in-GHCB scratch area if GHCB v2+ is in use (Rahul Kumar) [RHEL-192284] {CVE-2026-53360}
 - vsock/vmci: fix UAF when peer resets connection during handshake (CKI Backport Bot) [RHEL-232270] {CVE-2026-64115}
 - igc: set tx buffer type for SMD frames (CKI Backport Bot) [RHEL-227034] {CVE-2026-64035}
 - nvme/ioctl: check SUBMIT_IO with nvme_cmd_allowed() (CKI Backport Bot) [RHEL-269504] {CVE-2026-90227}
 - netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state (CKI Backport Bot) [RHEL-271672] {CVE-2026-93288}
 - thermal: core: Fix thermal zone device registration error path (Dennis Chen) [RHEL-226822] {CVE-2026-43332}
 - nvme: add missing SRCU grace period in error path (CKI Backport Bot) [RHEL-270902] {CVE-2026-89972}
 - netfilter: nf_conntrack: use get_unaligned_be32() in tcp_sack() (CKI Backport Bot) [RHEL-270670] {CVE-2026-97417}
 - KVM: arm64: Reassign nested_mmus array behind mmu_lock (Jon Maloy) [RHEL-227040] {CVE-2026-46317}
 - Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled (CKI Backport Bot) [RHEL-232611] {CVE-2026-46275}
 - Bluetooth: hci_uart: fix UAFs and race conditions in close and init paths (CKI Backport Bot) [RHEL-232611] {CVE-2026-46275}
 - nvme-tcp: fix host memory disclosure on R2T for a read command (CKI Backport Bot) [RHEL-263460] {CVE-2026-89481}
 - nvme-tcp: reject a read that transferred too few bytes (CKI Backport Bot) [RHEL-263369] {CVE-2026-89480}
 - ipv6: add NULL checks for idev in SRv6 paths (Antoine Tenart) [RHEL-257690] {CVE-2026-23442}
 - ipv6: fix use-after-free in ip6_finish_output2() (Antoine Tenart) [RHEL-258675] {CVE-2026-80792}
 - ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() (Antoine Tenart) [RHEL-259361] {CVE-2026-63924}
 - ipv6: exthdrs: refresh nh after handling HAO option (Antoine Tenart) [RHEL-259413] {CVE-2026-63922}
 - ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress() (Antoine Tenart) [RHEL-231279] {CVE-2026-63984}
 - ipv6: validate extension header length before copying to cmsg (Antoine Tenart) [RHEL-225381] {CVE-2026-63920}
 - Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_new_connection_cb() (CKI Backport Bot) [RHEL-231351] {CVE-2026-64557}
 - Bluetooth: 6lowpan: fix cyclic locking warning on netdev unregister (CKI Backport Bot) [RHEL-231351] {CVE-2026-64557}
 - Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_connection_cb() (CKI Backport Bot) [RHEL-231351] {CVE-2026-64557}
 - vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() (Abhishek Rawal) [RHEL-231721] {CVE-2026-63993}
 - tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]() (Abhishek Rawal) [RHEL-259588] {CVE-2026-63994}
 - tunnels: do not assume transport header in iptunnel_pmtud_check_icmp() (Abhishek Rawal) [RHEL-230774] {CVE-2026-63992}
 - vxlan: require CAP_NET_ADMIN in the device netns for changelink (Abhishek Rawal) [RHEL-238889] {CVE-2026-68432}
 - net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink (Abhishek Rawal) [RHEL-247004] {CVE-2026-72052}
 - net: ip_gre: require CAP_NET_ADMIN in the device netns for changelink (Abhishek Rawal) [RHEL-247040] {CVE-2026-63829}
 - netfilter: nf_conntrack_sip: widen NAT rewrite delta to s32 in sip_help_tcp() (CKI Backport Bot) [RHEL-260635] {CVE-2026-74569}
 - smb: client: fix double-free in SMB2_ioctl() replay (CKI Backport Bot) [RHEL-259778] {CVE-2026-64385}
 - KVM: s390: vsie: zero stale crypto bits (CKI Backport Bot) [RHEL-258123] {CVE-2026-80921}
 - dm-integrity: don't increment hash_offset twice (CKI Backport Bot) [RHEL-257771] {CVE-2026-72099}
 - KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1 (Jon Maloy) [RHEL-227374] {CVE-2026-46076}
 - KVM: SVM: Update x2APIC MSR intercepts if AVIC is inhibited while L2 is active (Jon Maloy) [RHEL-254524] {CVE-2026-74516}
 - KVM: SVM: Set/clear CR8 write interception when AVIC is (de)activated (Jon Maloy) [RHEL-254524] {CVE-2026-74516}
 - KVM: SVM: Move x2AVIC MSR interception helper to avic.c (Jon Maloy) [RHEL-254524] {CVE-2026-74516}
 - Bluetooth: fix UAF in bt_accept_dequeue() (CKI Backport Bot) [RHEL-229777] {CVE-2026-53357}
 - Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del() (CKI Backport Bot) [RHEL-229777] {CVE-2026-53357}
 - ipvs: clear IPv4 options after rebasing tunnel ICMP errors (CKI Backport Bot) [RHEL-254400] {CVE-2026-74669}
 - ipvs: ensure inner headers in ICMP errors are in headroom (CKI Backport Bot) [RHEL-254400] {CVE-2026-74669}
 - ipvs: fix PMTU for GUE/GRE tunnel ICMP errors (CKI Backport Bot) [RHEL-254400] {CVE-2026-74669}
 - netfilter: nf_queue: pin bridge device while NFQUEUE holds fake dst (CKI Backport Bot) [RHEL-252427] {CVE-2026-72255}
 - KVM: arm64: vgic: Check the interrupt is still ours before migrating it (CKI Backport Bot) [RHEL-252481] {CVE-2026-72289}
 - netfilter: flowtable: publish GC-visible tuple last (CKI Backport Bot) [RHEL-250570] {CVE-2026-74746}
 - netfilter: nf_log: validate MAC header was set before dumping it (CKI Backport Bot) [RHEL-232060] {CVE-2026-52942}
 - netfilter: nf_conntrack_sip: don't use simple_strtoul (CKI Backport Bot) [RHEL-232031] {CVE-2026-52986}
 - gfs2: add some missing log locking (CKI Backport Bot) [RHEL-230316] {CVE-2026-53049}
 - gfs2: Fix slab-use-after-free in qd_put (CKI Backport Bot) [RHEL-227553] {CVE-2026-45861}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://linux.oracle.com/errata/ELSA-2026-76739.html

Plugin Details

Severity: High

ID: 365481

File Name: oraclelinux_ELSA-2026-76739.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/13/2026

Updated: 10/13/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7

Percentile: 98.06

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2025-40149

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:oracle:linux:9, cpe:/o:oracle:linux:9:8:baseos_patch, p-cpe:/a:oracle:linux:kernel-abi-stablelists, p-cpe:/a:oracle:linux:kernel-core, p-cpe:/a:oracle:linux:kernel-cross-headers, p-cpe:/a:oracle:linux:kernel-debug-core, p-cpe:/a:oracle:linux:kernel-debug-devel-matched, p-cpe:/a:oracle:linux:kernel-debug-devel, p-cpe:/a:oracle:linux:kernel-debug-modules-core, p-cpe:/a:oracle:linux:kernel-debug-modules-extra, p-cpe:/a:oracle:linux:kernel-debug-modules, p-cpe:/a:oracle:linux:kernel-debug-uki-virt, p-cpe:/a:oracle:linux:kernel-debug, p-cpe:/a:oracle:linux:kernel-devel-matched, p-cpe:/a:oracle:linux:kernel-devel, p-cpe:/a:oracle:linux:kernel-headers, p-cpe:/a:oracle:linux:kernel-modules-core, p-cpe:/a:oracle:linux:kernel-modules-extra, p-cpe:/a:oracle:linux:kernel-modules, p-cpe:/a:oracle:linux:kernel-tools-libs-devel, p-cpe:/a:oracle:linux:kernel-tools-libs, p-cpe:/a:oracle:linux:kernel-tools, p-cpe:/a:oracle:linux:kernel-uki-virt-addons, p-cpe:/a:oracle:linux:kernel-uki-virt, p-cpe:/a:oracle:linux:kernel, p-cpe:/a:oracle:linux:libperf, p-cpe:/a:oracle:linux:perf, p-cpe:/a:oracle:linux:python3-perf, p-cpe:/a:oracle:linux:rtla, p-cpe:/a:oracle:linux:rv

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux

Exploit Ease: No known exploits are available

Patch Publication Date: 10/11/2026

Vulnerability Publication Date: 11/12/2025

Reference Information

CVE: CVE-2025-40149, CVE-2026-23442, CVE-2026-43332, CVE-2026-45861, CVE-2026-46076, CVE-2026-46275, CVE-2026-46317, CVE-2026-52942, CVE-2026-52986, CVE-2026-53049, CVE-2026-53357, CVE-2026-63829, CVE-2026-63920, CVE-2026-63922, CVE-2026-63924, CVE-2026-63984, CVE-2026-63992, CVE-2026-63993, CVE-2026-63994, CVE-2026-64385, CVE-2026-64557, CVE-2026-68432, CVE-2026-72052, CVE-2026-72099, CVE-2026-72255, CVE-2026-72289, CVE-2026-74516, CVE-2026-74569, CVE-2026-74669, CVE-2026-74746, CVE-2026-80792, CVE-2026-80921, CVE-2026-89480, CVE-2026-89481, CVE-2026-89972, CVE-2026-90227, CVE-2026-93288, CVE-2026-97417