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Ubuntu 26.04 LTS : MariaDB vulnerabilities (USN-8536-1)

medium Nessus Plugin ID 327096

Synopsis

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

Description

The remote Ubuntu 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8536-1 advisory.

 It was discovered that MariaDB did not properly validate parameters supplied by a joiner node during a State Snapshot Transfer using the mariabackup method. An attacker could possibly use this issue to execute arbitrary shell commands on the donor node. (CVE-2026-44168)

 It was discovered that MariaDB did not properly enforce the SHOW CREATE ROUTINE privilege when a user obtained access to a stored routine via a role. An authenticated user could possibly use this issue to obtain sensitive information. (CVE-2026-44169)

 It was discovered that MariaDB's mbstream utility did not properly validate paths when unpacking archives.
 An attacker could possibly use this issue to write files outside of the intended target directory.
 (CVE-2026-44171)

 It was discovered that MariaDB's mysql_real_escape_string() function incorrectly handled the big5 character set. An attacker could possibly use this issue to perform SQL injection attacks.
 (CVE-2026-44172)

 It was discovered that MariaDB did not properly check the FILE privilege when the FROM clause of a SELECT ... INTO OUTFILE or SELECT ... INTO DUMPFILE statement contained only subqueries. An authenticated user could possibly use this issue to write files to unintended locations. (CVE-2026-44173)

 It was discovered that MariaDB did not properly validate parameters supplied by a joiner node during a State Snapshot Transfer using the rsync method. An attacker could possibly use this issue to execute arbitrary shell commands on the donor node. (CVE-2026-48163)

 It was discovered that MariaDB allowed a high-privileged user to set certain Galera system variables to values containing shell commands, which were then executed by the server process. An authenticated user could possibly use this issue to execute arbitrary shell commands. (CVE-2026-48165)

 It was discovered that MariaDB executed shell commands embedded in the name of a joiner node when wsrep_notify_cmd was enabled. A remote attacker could possibly use this issue to execute arbitrary shell commands. (CVE-2026-49261)

Tenable has extracted the preceding description block directly from the Ubuntu 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://ubuntu.com/security/notices/USN-8536-1

Plugin Details

Severity: Medium

ID: 327096

File Name: ubuntu_USN-8536-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 7/15/2026

Updated: 7/15/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.6

Percentile: 98.46

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-49261

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-44172

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-s3, p-cpe:/a:canonical:ubuntu_linux:libmariadbd-dev, p-cpe:/a:canonical:ubuntu_linux:mariadb-client-core, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-provider-lzo, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-provider-bzip2, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-provider-lz4, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-provider-snappy, p-cpe:/a:canonical:ubuntu_linux:libmariadb-dev-compat, p-cpe:/a:canonical:ubuntu_linux:libmariadbd19t64, p-cpe:/a:canonical:ubuntu_linux:libmariadb3, p-cpe:/a:canonical:ubuntu_linux:mariadb-backup, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-connect, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-mroonga, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-hashicorp-key-management, p-cpe:/a:canonical:ubuntu_linux:mariadb-client-compat, p-cpe:/a:canonical:ubuntu_linux:mariadb-test-data, p-cpe:/a:canonical:ubuntu_linux:mariadb-common, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-gssapi-server, p-cpe:/a:canonical:ubuntu_linux:mariadb-server, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-provider-lzma, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-connect-jdbc, p-cpe:/a:canonical:ubuntu_linux:libmariadb-dev, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:mariadb-server-compat, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-cracklib-password-check, p-cpe:/a:canonical:ubuntu_linux:mariadb-client, p-cpe:/a:canonical:ubuntu_linux:mariadb-server-core, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-spider, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-gssapi-client, p-cpe:/a:canonical:ubuntu_linux:mariadb-test, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-rocksdb, p-cpe:/a:canonical:ubuntu_linux:mariadb-plugin-oqgraph

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 7/14/2026

Vulnerability Publication Date: 5/18/2026

Reference Information

CVE: CVE-2026-44168, CVE-2026-44169, CVE-2026-44171, CVE-2026-44172, CVE-2026-44173, CVE-2026-48163, CVE-2026-48165, CVE-2026-49261

USN: 8536-1