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AlmaLinux 9 : kernel (ALSA-2026:21556)

high Nessus Plugin ID 319631

Synopsis

The remote AlmaLinux host is missing one or more security updates.

Description

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:21556 advisory.

 * kernel: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al (CVE-2025-38653)
 * kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr (CVE-2025-68183)
 * kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)
 * kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)
 * kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)
 * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)
 * kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)
 * kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold (CVE-2026-31408)
 * kernel: net: sched: act_csum: validate nested VLAN headers (CVE-2026-31684)
 * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)
 * kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup (CVE-2026-43027)
 * kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)
 * kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq (CVE-2026-43051)
 * kernel: smb: client: validate the whole DACL before rewriting it in cifsacl (CVE-2026-31709)
 * kernel: Bluetooth: SCO: fix race conditions in sco_sock_connect() (CVE-2026-43023)
 * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)
 * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)
 * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)
 * kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303)

Tenable has extracted the preceding description block directly from the AlmaLinux 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://access.redhat.com/errata/RHSA-2026:21556

https://errata.almalinux.org/9/ALSA-2026-21556.html

Plugin Details

Severity: High

ID: 319631

File Name: alma_linux_ALSA-2026-21556.nasl

Version: 1.1

Type: Local

Published: 6/7/2026

Updated: 6/7/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

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-2026-43027

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: p-cpe:/a:alma:linux:kernel-rt-64k-modules, p-cpe:/a:alma:linux:kernel-zfcpdump-devel-matched, p-cpe:/a:alma:linux:kernel-rt-modules, p-cpe:/a:alma:linux:kernel-64k-core, p-cpe:/a:alma:linux:kernel-rt-64k-debug-modules-core, p-cpe:/a:alma:linux:kernel-zfcpdump-modules-core, p-cpe:/a:alma:linux:kernel-rt-modules-extra, p-cpe:/a:alma:linux:perf, p-cpe:/a:alma:linux:kernel-rt-debug-modules-extra, p-cpe:/a:alma:linux:kernel-64k-debug-modules-extra, cpe:/o:alma:linux:9::highavailability, p-cpe:/a:alma:linux:kernel-rt-64k-debug-modules, p-cpe:/a:alma:linux:kernel-64k-debug-devel-matched, cpe:/o:alma:linux:9::sap, cpe:/o:alma:linux:9::crb, p-cpe:/a:alma:linux:kernel-debug-devel, p-cpe:/a:alma:linux:kernel-zfcpdump-devel, cpe:/o:alma:linux:9, p-cpe:/a:alma:linux:kernel-rt-devel, p-cpe:/a:alma:linux:kernel-64k-debug, p-cpe:/a:alma:linux:rv, p-cpe:/a:alma:linux:kernel-cross-headers, p-cpe:/a:alma:linux:kernel-debug-modules-extra, p-cpe:/a:alma:linux:kernel-uki-virt-addons, p-cpe:/a:alma:linux:rtla, p-cpe:/a:alma:linux:kernel-64k-debug-devel, p-cpe:/a:alma:linux:kernel-debug, p-cpe:/a:alma:linux:kernel-headers, p-cpe:/a:alma:linux:kernel-core, cpe:/o:alma:linux:9::supplementary, cpe:/o:alma:linux:9::resilientstorage, p-cpe:/a:alma:linux:kernel-zfcpdump-modules, p-cpe:/a:alma:linux:kernel-64k, p-cpe:/a:alma:linux:kernel-rt-64k-debug-devel, cpe:/o:alma:linux:9::sap_hana, p-cpe:/a:alma:linux:kernel-rt, p-cpe:/a:alma:linux:kernel-debug-modules, p-cpe:/a:alma:linux:kernel-devel-matched, p-cpe:/a:alma:linux:kernel-rt-debug-modules-core, p-cpe:/a:alma:linux:kernel-64k-modules, p-cpe:/a:alma:linux:kernel-rt-64k-debug, p-cpe:/a:alma:linux:kernel-abi-stablelists, p-cpe:/a:alma:linux:kernel-tools-libs-devel, p-cpe:/a:alma:linux:kernel-modules-core, p-cpe:/a:alma:linux:kernel, p-cpe:/a:alma:linux:kernel-64k-devel, p-cpe:/a:alma:linux:kernel-zfcpdump, p-cpe:/a:alma:linux:kernel-zfcpdump-modules-extra, p-cpe:/a:alma:linux:kernel-debug-modules-core, p-cpe:/a:alma:linux:kernel-64k-debug-core, p-cpe:/a:alma:linux:kernel-rt-64k-debug-core, p-cpe:/a:alma:linux:kernel-rt-debug-core, p-cpe:/a:alma:linux:kernel-rt-debug, p-cpe:/a:alma:linux:kernel-devel, cpe:/o:alma:linux:9::realtime, p-cpe:/a:alma:linux:kernel-uki-virt, p-cpe:/a:alma:linux:kernel-debug-devel-matched, p-cpe:/a:alma:linux:kernel-tools-libs, cpe:/o:alma:linux:9::nfv, p-cpe:/a:alma:linux:kernel-debug-uki-virt, cpe:/o:alma:linux:9::baseos, p-cpe:/a:alma:linux:kernel-rt-64k-debug-modules-extra, p-cpe:/a:alma:linux:kernel-tools, cpe:/o:alma:linux:9::appstream, p-cpe:/a:alma:linux:kernel-rt-modules-core, p-cpe:/a:alma:linux:libperf, p-cpe:/a:alma:linux:kernel-rt-64k, p-cpe:/a:alma:linux:kernel-rt-core, p-cpe:/a:alma:linux:kernel-64k-modules-core, p-cpe:/a:alma:linux:kernel-zfcpdump-core, p-cpe:/a:alma:linux:kernel-rt-debug-devel, p-cpe:/a:alma:linux:kernel-64k-debug-modules-core, p-cpe:/a:alma:linux:kernel-debug-core, p-cpe:/a:alma:linux:kernel-modules, p-cpe:/a:alma:linux:kernel-rt-64k-modules-extra, p-cpe:/a:alma:linux:kernel-rt-64k-modules-core, p-cpe:/a:alma:linux:kernel-64k-devel-matched, p-cpe:/a:alma:linux:kernel-rt-64k-devel, p-cpe:/a:alma:linux:kernel-rt-64k-core, p-cpe:/a:alma:linux:python3-perf, p-cpe:/a:alma:linux:kernel-64k-modules-extra, p-cpe:/a:alma:linux:kernel-modules-extra, p-cpe:/a:alma:linux:kernel-rt-debug-modules, p-cpe:/a:alma:linux:kernel-64k-debug-modules

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/28/2026

Vulnerability Publication Date: 8/22/2025

Reference Information

CVE: CVE-2025-38653, CVE-2025-68183, CVE-2025-68366, CVE-2025-68724, CVE-2025-71089, CVE-2026-23392, CVE-2026-23455, CVE-2026-31408, CVE-2026-31684, CVE-2026-31685, CVE-2026-31709, CVE-2026-43020, CVE-2026-43023, CVE-2026-43027, CVE-2026-43051, CVE-2026-43110, CVE-2026-43158, CVE-2026-43190, CVE-2026-43303

CWE: 120, 125, 1285, 1287, 1288, 190, 354, 416, 459, 617, 820, 821, 825, 909, 911

RHSA: 2026:21556