RHEL 9 : kernel-rt (RHSA-2026:93047)

high Nessus Plugin ID 374150

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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:93047 advisory.

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* kernel: ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS (CVE-2022-50315)

* kernel: Linux kernel: Denial of Service in qla2xxx SCSI driver due to improper command handling after chip reset (CVE-2025-68745)

* kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)

* kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)

* kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (CVE-2026-43493)

* kernel: Linux kernel: xfrm single-frag length not properly limited ()

* kernel: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show() (CVE-2026-46149)

* kernel: crypto: af_alg - Cap AEAD AD length to 0x80000000 (CVE-2026-52972)

* kernel: sctp: validate embedded INIT chunk and address list lengths in cookie (CVE-2026-53224)

* kernel: sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing (CVE-2026-53246)

* kernel: mac802154: llsec: add skb_cow_data() before in-place crypto (CVE-2026-63831)

* kernel: blk-cgroup: fix UAF in __blkcg_rstat_flush() (CVE-2026-63802)

* kernel: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() (CVE-2026-63924)

* kernel: ipv6: exthdrs: refresh nh after handling HAO option (CVE-2026-63922)

* kernel: ipv6: validate extension header length before copying to cmsg (CVE-2026-63920)

* kernel: vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() (CVE-2026-63993)

* kernel: ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress() (CVE-2026-63984)

* kernel: blk-mq: pop cached request if it is usable (CVE-2026-64017)

* kernel: nvmet-auth: validate reply message payload bounds against transfer length (CVE-2026-64319)

* kernel: dm-verity: fix buffer overflow in FEC calculation (CVE-2026-72098)

* kernel: selinux: check connect-related permissions on TCP Fast Open (CVE-2026-72243)

* kernel: ALSA: usx2y: bound the hwdep mmap fault offset (CVE-2026-74641)

* kernel: ipv6: fix use-after-free in ip6_finish_output2() (CVE-2026-80792)

* kernel: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read (CVE-2026-89846)

* kernel: kernel: strparser: use-after-free via msg_timer_work rearm after strp_done() cancellation ()

Bug Fix(es) and Enhancement(s):

* BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580 (JIRA:RHEL-242997)

For 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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

Plugin Details

Severity: High

ID: 374150

File Name: redhat-RHSA-2026-93047.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 10/30/2026

Updated: 10/30/2026

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

Risk Information

VPR

Risk Factor: High

Score: 7.7

Percentile: 98.9

Vendor

Vendor Severity: Important

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-2026-43020

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:redhat:rhel_e4s:9.2, p-cpe:/a:redhat:enterprise_linux:kernel-rt-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-modules-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-modules, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug, p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-kvm, p-cpe:/a:redhat:enterprise_linux:kernel-rt-modules-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-rt-modules, p-cpe:/a:redhat:enterprise_linux:kernel-rt

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/30/2026

Vulnerability Publication Date: 7/21/2021

Reference Information

CVE: CVE-2022-50315, CVE-2025-68745, CVE-2026-43020, CVE-2026-43450, CVE-2026-43493, CVE-2026-46149, CVE-2026-52972, CVE-2026-53224, CVE-2026-53246, CVE-2026-63802, CVE-2026-63831, CVE-2026-63920, CVE-2026-63922, CVE-2026-63924, CVE-2026-63984, CVE-2026-63993, CVE-2026-64017, CVE-2026-64319, CVE-2026-72098, CVE-2026-72243, CVE-2026-74641, CVE-2026-80792, CVE-2026-89846

CWE: 120, 125, 130, 190, 20, 366, 551, 770, 787, 805, 820, 825

RHSA: 2026:93047

Detections

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