RHEL 9 : kernel (RHSA-2026:99135)

medium Nessus Plugin ID 379392

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-2026:99135 advisory.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196)

* kernel: net/iucv: fix use-after-free of a severed iucv_path (CVE-2026-68140)

* kernel: sctp: avoid auth_enable sysctl UAF during netns teardown (CVE-2026-68162)

* kernel: s390/zcrypt: Validate length for CCA AES cipher key requests (CVE-2026-68452)

* kernel: s390/zcrypt: Validate length for CCA ECC private key requests (CVE-2026-68451)

* kernel: sunrpc: pin svc_xprt across the asynchronous TLS handshake callback (CVE-2026-72222)

* kernel: sunrpc: wait for in-flight TLS handshake callback when cancel loses race (CVE-2026-72221)

* kernel: nvmet-tcp: check return value of nvmet_tcp_set_queue_sock (CVE-2026-74385)

* kernel: sctp: keep chunk->transport in step with the list it is queued on (CVE-2026-74588)

* kernel: sctp: clear new_transport when removing a peer (CVE-2026-74586)

* kernel: sctp: validate cookie AUTH state before use (CVE-2026-74752)

* kernel: mptcp: options: reset DSS fields in case of unexpected size (CVE-2026-80586)

* kernel: s390/vfio_ccw: Cancel existing workqueues (CVE-2026-80553)

* kernel: powerpc/pseries: papr-phy-attest - validate cmd.length, plug mem leak (CVE-2026-80571)

* kernel: s390/qeth: validate user buffer length in SNMP and ARP query ioctls (CVE-2026-80584)

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

* kernel: net/smc: fix use-after-free of the LLC qentry in smc_llc_srv_add_link() (CVE-2026-80981)

* kernel: smb: client: fix OOB read/write from unvalidated DataOffset in coalesce_t2() (CVE-2026-89633)

* kernel: sctp: stop processing a packet once its association is deleted (CVE-2026-89479)

* kernel: s390/vfio-ap: Fix missing lock required to access list of ap_matrix_mdev objects (CVE-2026-89956)

* kernel: ALSA: seq: midi: Serialize input teardown with event_input (CVE-2026-90207)

* kernel: ALSA: pcm: Serialize PCM mmap with buffer reallocation to fix page UAF (CVE-2026-98116)

* kernel: smb: client: validate absolute native symlink targets before NT fixups (CVE-2026-98318)

* kernel: ipv4: validate checksum_start before completing checksum (CVE-2026-99999)

* kernel: net/sched: act_ct: fix helper UAF due to extensions realloc (CVE-2026-98442)

* kernel: ALSA: ua101: reject mismatched capture/playback packet sizes (CVE-2026-98741)

* kernel: net/smc: protect clcsock lifetime in smc_getname (CVE-2026-99032)

* kernel: kernel: Denial of Service via unvalidated task in iSCSI management responses (CVE-2026-99152)

* kernel: kernel: Denial of service via unvalidated task tag in iSCSI Reject PDU (CVE-2026-99153)

Bug Fix(es) and Enhancement(s):

* [RHEL9.9z] watchdog: System panics during reboot when pretimeout is disabled (0) (JIRA:RHEL-255218)

* RT scheduler livelock: migrate-disabled task at pushable-list head causes repeated RT push/stopper retries, starving a critical RT task (remaining issue after CVE-2026-45919 fix in 94894c9c477e) [rhel-9.9.z] (JIRA:RHEL-256280)

* MADVISE i/o size in RHEL 9 additionally limited by read_ahead_kb - Was addressed in RHEL8 via RHEL-22476 [rhel-9.9.z] (JIRA:RHEL-259532)

* try_charge_memcg() refactor in kernel 5.14.0-687.36.1 causes premature memcg OOM with GiB of clean page cache present [rhel-9.9.z] (JIRA:RHEL-269061)

* RHEL9.4 - kernel: CPU hotplug unsupported by CPUMF [rhel-9.9.z] (JIRA:RHEL-270893)

* Accel-DSA: dmaengine: idxd: kernel oops on unbind [rhel-9.9.z] (JIRA:RHEL-274411)

* af_unix: Fix peek then tail dereference UAF in unix_stream_data_wait() [rhel-9.9] (JIRA:RHEL-275410)

* Kernel panic after stopping retis capture [rhel-9.9.z] (JIRA:RHEL-275457)

* Hard lockup experienced with repro from RHEL-282072 [rhel-9.9.z] (JIRA:RHEL-290031)

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: Medium

ID: 379392

File Name: redhat-RHSA-2026-99135.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 11/12/2026

Updated: 11/12/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 8

Percentile: 99.69

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-53196

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 6.1

Vector: CVSS:3.0/AV:P/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:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:kernel-64k-core, p-cpe:/a:redhat:enterprise_linux:kernel-64k-debug-core, p-cpe:/a:redhat:enterprise_linux:kernel-64k-debug-devel-matched, p-cpe:/a:redhat:enterprise_linux:kernel-64k-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-64k-debug-modules-core, p-cpe:/a:redhat:enterprise_linux:kernel-64k-debug-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-64k-debug-modules, p-cpe:/a:redhat:enterprise_linux:kernel-64k-debug, p-cpe:/a:redhat:enterprise_linux:kernel-64k-devel-matched, p-cpe:/a:redhat:enterprise_linux:kernel-64k-devel, p-cpe:/a:redhat:enterprise_linux:kernel-64k-modules-core, p-cpe:/a:redhat:enterprise_linux:kernel-64k-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-64k-modules, p-cpe:/a:redhat:enterprise_linux:kernel-64k, p-cpe:/a:redhat:enterprise_linux:kernel-core, p-cpe:/a:redhat:enterprise_linux:kernel-debug-core, p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel-matched, p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-debug-modules-core, p-cpe:/a:redhat:enterprise_linux:kernel-debug-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-debug-modules, p-cpe:/a:redhat:enterprise_linux:kernel-debug-uki-virt, p-cpe:/a:redhat:enterprise_linux:kernel-debug, p-cpe:/a:redhat:enterprise_linux:kernel-devel-matched, p-cpe:/a:redhat:enterprise_linux:kernel-devel, p-cpe:/a:redhat:enterprise_linux:kernel-modules-core, p-cpe:/a:redhat:enterprise_linux:kernel-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-modules, p-cpe:/a:redhat:enterprise_linux:kernel-rt-64k-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-64k-debug-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-64k-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-64k-debug-modules-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-64k-debug-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-rt-64k-debug-modules, p-cpe:/a:redhat:enterprise_linux:kernel-rt-64k-debug, p-cpe:/a:redhat:enterprise_linux:kernel-rt-64k-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-64k-modules-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-64k-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-rt-64k-modules, p-cpe:/a:redhat:enterprise_linux:kernel-rt-64k, 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-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-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, p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs-devel, p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs, p-cpe:/a:redhat:enterprise_linux:kernel-tools, p-cpe:/a:redhat:enterprise_linux:kernel-uki-virt-addons, p-cpe:/a:redhat:enterprise_linux:kernel-uki-virt, p-cpe:/a:redhat:enterprise_linux:kernel-zfcpdump-core, p-cpe:/a:redhat:enterprise_linux:kernel-zfcpdump-devel-matched, p-cpe:/a:redhat:enterprise_linux:kernel-zfcpdump-devel, p-cpe:/a:redhat:enterprise_linux:kernel-zfcpdump-modules-core, p-cpe:/a:redhat:enterprise_linux:kernel-zfcpdump-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-zfcpdump-modules, p-cpe:/a:redhat:enterprise_linux:kernel-zfcpdump, p-cpe:/a:redhat:enterprise_linux:kernel, p-cpe:/a:redhat:enterprise_linux:libperf, p-cpe:/a:redhat:enterprise_linux:perf, p-cpe:/a:redhat:enterprise_linux:python3-perf, p-cpe:/a:redhat:enterprise_linux:rtla, p-cpe:/a:redhat:enterprise_linux:rv

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/12/2026

Vulnerability Publication Date: 4/29/2025

Reference Information

CVE: CVE-2026-53196, CVE-2026-68140, CVE-2026-68162, CVE-2026-68451, CVE-2026-68452, CVE-2026-72221, CVE-2026-72222, CVE-2026-74385, CVE-2026-74586, CVE-2026-74588, CVE-2026-74752, CVE-2026-80553, CVE-2026-80571, CVE-2026-80584, CVE-2026-80586, CVE-2026-80792, CVE-2026-80981, CVE-2026-89479, CVE-2026-89633, CVE-2026-89956, CVE-2026-90207, CVE-2026-98116, CVE-2026-98318, CVE-2026-98442, CVE-2026-98741, CVE-2026-99032, CVE-2026-99152, CVE-2026-99153, CVE-2026-99999

CWE: 125, 366, 416, 476, 772, 787, 805, 824, 825

RHSA: 2026:99135

Detections

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