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AlmaLinux 9.6 [TuxCare] Security Update: kernel / kernel-abi-stablelists / kernel-core / etc Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1786352940)

high Nessus Plugin ID 360481

Synopsis

The AlmaLinux host is missing one or more security updates.

Description

The AlmaLinux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1786352940 advisory.

 - In the Linux kernel, the following vulnerability has been resolved: serial: imx: fix tx statemachine deadlock When using the serial port as RS485 port, the tx statemachine is used to control the RTS pin to drive the RS485 transceiver TX_EN pin. When the TTY port is closed in the middle of a transmission (for instance during userland application crash), imx_uart_shutdown disables the interface and disables the Transmission Complete interrupt. afer that, imx_uart_stop_tx bails on an incomplete transmission, to be retriggered by the TC interrupt. This interrupt is disabled and therefore the tx statemachine never transitions out of SEND. The statemachine is in deadlock now, and the TX_EN remains low, making the interface useless. imx_uart_stop_tx now checks for incomplete transmission AND whether TC interrupts are enabled before bailing to be retriggered. This makes sure the state machine handling is reached, and is properly set to WAIT_AFTER_SEND. (CVE-2023-52456)

 - In the Linux kernel, the following vulnerability has been resolved: kdb: Fix buffer overflow during tab- complete Currently, when the user attempts symbol completion with the Tab key, kdb will use strncpy() to insert the completed symbol into the command buffer. Unfortunately it passes the size of the source buffer rather than the destination to strncpy() with predictably horrible results. Most obviously if the command buffer is already full but cp, the cursor position, is in the middle of the buffer, then we will write past the end of the supplied buffer. Fix this by replacing the dubious strncpy() calls with memmove()/memcpy() calls plus explicit boundary checks to make sure we have enough space before we start moving characters around. (CVE-2024-39480)

 - In the Linux kernel, the following vulnerability has been resolved: Fix userfaultfd_api to return EINVAL as expected Currently if we request a feature that is not set in the Kernel config we fail silently and return all the available features. However, the man page indicates we should return an EINVAL. We need to fix this issue since we can end up with a Kernel warning should a program request the feature UFFD_FEATURE_WP_UNPOPULATED on a kernel with the config not set with this feature. [ 200.812896] WARNING:
 CPU: 91 PID: 13634 at mm/memory.c:1660 zap_pte_range+0x43d/0x660 [ 200.820738] Modules linked in: [ 200.869387] CPU: 91 PID: 13634 Comm: userfaultfd Kdump: loaded Not tainted 6.9.0-rc5+ #8 [ 200.877477] Hardware name: Dell Inc. PowerEdge R6525/0N7YGH, BIOS 2.7.3 03/30/2022 [ 200.885052] RIP:
 0010:zap_pte_range+0x43d/0x660 (CVE-2024-41027)

 - In the Linux kernel, the following vulnerability has been resolved: mlxsw: core_linecards: Fix double memory deallocation in case of invalid INI file In case of invalid INI file mlxsw_linecard_types_init() deallocates memory but doesn't reset pointer to NULL and returns 0. In case of any error occurred after mlxsw_linecard_types_init() call, mlxsw_linecards_init() calls mlxsw_linecard_types_fini() which performs memory deallocation again. Add pointer reset to NULL. Found by Linux Verification Center (linuxtesting.org) with SVACE. (CVE-2024-42138)

 - In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Fix data leak in mmio_read() The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an address from the VMM. Sean noticed that mmio_read() unintentionally exposes the value of an initialized variable (val) on the stack to the VMM. This variable is only needed as an output value. It did not need to be passed to the VMM in the first place. Do not send the original value of *val to the VMM. [ dhansen: clarify what 'val' is used for. ] (CVE-2024-46794)

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 based on the guidance in TuxCare advisory ALMALINUX9.6:CLSA-2026:1786352940.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1786352940

http://www.nessus.org/u?3535afaf

Plugin Details

Severity: High

ID: 360481

File Name: tuxcare_alma_linux_9.6_CLSA-2026-1786352940.nasl

Version: 1.1

Type: Local

Published: 10/1/2026

Updated: 10/1/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 8

Percentile: 99.68

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-53112

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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:P/RL:O/RC:C

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/OS/extended-third-party

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/10/2026

Vulnerability Publication Date: 7/21/2021

Reference Information

CVE: CVE-2022-49388, CVE-2023-52456, CVE-2023-53271, CVE-2024-39480, CVE-2024-41027, CVE-2024-42138, CVE-2024-46794, CVE-2024-53202, CVE-2024-56372, CVE-2024-56625, CVE-2024-56632, CVE-2024-56745, CVE-2024-57917, CVE-2024-58093, CVE-2025-21645, CVE-2025-21716, CVE-2025-21770, CVE-2025-21783, CVE-2025-21810, CVE-2025-21874, CVE-2025-21890, CVE-2025-21906, CVE-2025-21916, CVE-2025-21970, CVE-2025-21973, CVE-2025-21978, CVE-2025-22016, CVE-2025-22050, CVE-2025-22117, CVE-2025-22128, CVE-2025-23134, CVE-2025-23151, CVE-2025-37793, CVE-2025-37912, CVE-2025-37957, CVE-2025-38020, CVE-2025-38113, CVE-2025-38239, CVE-2025-38543, CVE-2025-38557, CVE-2025-38632, CVE-2025-38676, CVE-2025-39701, CVE-2025-39811, CVE-2025-39860, CVE-2025-39861, CVE-2025-39877, CVE-2025-39922, CVE-2025-39944, CVE-2025-39957, CVE-2025-39963, CVE-2025-40030, CVE-2025-40035, CVE-2025-40070, CVE-2025-40085, CVE-2025-40115, CVE-2025-40171, CVE-2025-40211, CVE-2025-40264, CVE-2025-40275, CVE-2025-40325, CVE-2025-68229, CVE-2025-68288, CVE-2025-68372, CVE-2025-68782, CVE-2025-71064, CVE-2025-71229, CVE-2025-71231, CVE-2025-71234, CVE-2025-71305, CVE-2026-23129, CVE-2026-23135, CVE-2026-23148, CVE-2026-23160, CVE-2026-23173, CVE-2026-23187, CVE-2026-23242, CVE-2026-23260, CVE-2026-23317, CVE-2026-23359, CVE-2026-23363, CVE-2026-23412, CVE-2026-23413, CVE-2026-23418, CVE-2026-31430, CVE-2026-31469, CVE-2026-31520, CVE-2026-31522, CVE-2026-31604, CVE-2026-31614, CVE-2026-31649, CVE-2026-31655, CVE-2026-31697, CVE-2026-31758, CVE-2026-43047, CVE-2026-43056, CVE-2026-43111, CVE-2026-43114, CVE-2026-43120, CVE-2026-43133, CVE-2026-43180, CVE-2026-43233, CVE-2026-43260, CVE-2026-43304, CVE-2026-43329, CVE-2026-43334, CVE-2026-43339, CVE-2026-43346, CVE-2026-43370, CVE-2026-43432, CVE-2026-43459, CVE-2026-43466, CVE-2026-43473, CVE-2026-43488, CVE-2026-45851, CVE-2026-45872, CVE-2026-45922, CVE-2026-45982, CVE-2026-45997, CVE-2026-46006, CVE-2026-46070, CVE-2026-46079, CVE-2026-46089, CVE-2026-46092, CVE-2026-46094, CVE-2026-46107, CVE-2026-46136, CVE-2026-46140, CVE-2026-46146, CVE-2026-46320, CVE-2026-52964, CVE-2026-53088, CVE-2026-53093, CVE-2026-53102, CVE-2026-53105, CVE-2026-53112, CVE-2026-53113, CVE-2026-53146, CVE-2026-53147, CVE-2026-53190, CVE-2026-53229, CVE-2026-53241, CVE-2026-53318, CVE-2026-53337, CVE-2026-53347, CVE-2026-64561

CLSA: 2026:1786352940