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Oracle Linux 9 : kernel (ELSA-2026-86033)

critical Nessus Plugin ID 372926

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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-2026-86033 advisory.

 - ipv4: validate checksum_start before completing checksum (CKI Backport Bot) [RHEL-284987] {CVE-2026-99999}
 - smb: client: reject a tree connect response whose byte count is too small (Alisher Mazhirinov) [RHEL-271284] {CVE-2026-89631}
 - exec: Cleanup POSIX timers right after de_thread() (Luiz Capitulino) [RHEL-282063] {CVE-2026-98260}
 - perf: Fix addr_filter_ranges lifetime (Vratislav Bendel) [RHEL-271871] {CVE-2026-93817}
 - smb: client: fix OOB read/write from unvalidated DataOffset in coalesce_t2() (Frank Sorenson) [RHEL-271487] {CVE-2026-89633}
 - bridge: mcast: Fix a possible use-after-free when removing a bridge port (Jakub Ramaseuski) [RHEL-232528] {CVE-2026-64032}
 - tcp: fix stale per-CPU tcp_tw_isn leak enabling ISN prediction (Antoine Tenart) [RHEL-231693] {CVE-2026-64024}
 - ipv4: fib: free fib_alias with kfree_rcu() on insert error path (Jamie Bainbridge) [RHEL-233131] {CVE-2026-64572}
 - inet: frags: strip GSO state from fragments before reassembly (Jamie Bainbridge) [RHEL-254224] {CVE-2026-80590}
 - ipv4: raw: reject IP_HDRINCL packets with ihl < 5 (Jamie Bainbridge) [RHEL-225452] {CVE-2026-64114}
 - usb: typec: ucsi: validate connector number in ucsi_connector_change() (Desnes Nunes) [RHEL-259429] {CVE-2026-63958}
 - usb: typec: tcpm: bound altmode_desc[] per iteration in svdm_consume_modes() (Desnes Nunes) [RHEL-259429] {CVE-2026-63962}
 - usb: typec: tcpm: validate VDO count in Discover Identity ACK handlers (Desnes Nunes) [RHEL-259429] {CVE-2026-63963}
 - usb: typec: altmodes/displayport: validate count before reading Status Update VDO (Desnes Nunes) [RHEL-259429] {CVE-2026-63961}
 - USB: serial: cypress_m8: fix memory corruption with small endpoint (Desnes Nunes) [RHEL-259322] {CVE-2026-63956}
 - USB: serial: safe_serial: fix memory corruption with small endpoint (Desnes Nunes) [RHEL-259322] {CVE-2026-63957}
 - USB: serial: omninet: fix memory corruption with small endpoint (Desnes Nunes) [RHEL-259322] {CVE-2026-63928}
 - USB: serial: mxuport: fix memory corruption with small endpoint (Desnes Nunes) [RHEL-259322] {CVE-2026-63899}
 - Bluetooth: hci_sync: Fix advertising data UAFs (CKI Backport Bot) [RHEL-254674] {CVE-2026-74509}
 - openvswitch: vport: fix self-deadlock on release of tunnel ports (CKI Backport Bot) [RHEL-253856] {CVE-2026-31678}
 - openvswitch: defer tunnel netdev_put to RCU release (CKI Backport Bot) [RHEL-253856] {CVE-2026-31678}
 - Bluetooth: hci_core: Fix queuing tx_work after workqueue is drained (CKI Backport Bot) [RHEL-244764] {CVE-2026-63974}
 - Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close (CKI Backport Bot) [RHEL-244764] {CVE-2026-63974}

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-2026-86033.html

Plugin Details

Severity: Critical

ID: 372926

File Name: oraclelinux_ELSA-2026-86033.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/28/2026

Updated: 10/28/2026

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

Risk Information

VPR

Risk Factor: High

Score: 8

Percentile: 99.69

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-89633

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

Temporal Vector: CVSS:3.0/E:P/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/OracleLinux, Host/RedHat/release, Host/RedHat/rpm-list, Host/local_checks_enabled

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/20/2026

Vulnerability Publication Date: 4/23/2026

Reference Information

CVE: CVE-2026-31678, CVE-2026-52935, CVE-2026-63899, CVE-2026-63962, CVE-2026-63974, CVE-2026-64024, CVE-2026-64032, CVE-2026-64114, CVE-2026-64572, CVE-2026-74509, CVE-2026-80590, CVE-2026-89633, CVE-2026-93817, CVE-2026-98260, CVE-2026-99999