Detections
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Amazon Linux 2023 : valkey, valkey-devel (ALAS2023-2026-1748)
high Nessus Plugin ID 316991
Language:
Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1748 advisory.Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client flow does not handle an error return from `processCommandAndResetClient` when re-executing a blocked command. If a blocked client is evicted during this flow, an authenticated attacker can trigger a use- after-free that may lead to remote code execution. This has been patched in version 8.6.3.
(CVE-2026-23479)
Redis is an in-memory data structure store. In all versions of redis-server with Lua scripting, an authenticated attacker can exploit the master-replica synchronization mechanism to trigger a use-after- free on replicas where replica-read-only is disabled or can be disabled, which may lead to remote code execution. A workaround is to prevent users from executing Lua scripts or avoid using replicas where replica-read-only is disabled. This is patched in version 8.6.3. (CVE-2026-23631)
Redis is an in-memory data structure store. In versions of redis-server up to 8.6.3, the RESTORE command does not properly validate serialized values. An authenticated attacker with permission to execute RESTORE can supply a crafted serialized payload that triggers invalid memory access and may lead to remote code execution. A workaround is to restrict access to the RESTORE command with ACL rules. This is patched in version 8.6.3. (CVE-2026-25243)
Tenable has extracted the preceding description block directly from the tested product 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
Run 'dnf update valkey --releasever 2023.11.20260526' or or 'dnf update --advisory ALAS2023-2026-1748 --releasever 2023.11.20260526' to update your system.See Also
https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1748.html
https://alas.aws.amazon.com/faqs.html
https://explore.alas.aws.amazon.com/CVE-2026-23479.html
Plugin Details
Severity: High
ID: 316991
File Name: al2023_ALAS2023-2026-1748.nasl
Version: 1.1
Type: Local
Agent: unix
Published: 5/27/2026
Updated: 5/27/2026
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: High
Score: 8.4
CVSS v2
Risk Factor: High
Base Score: 9
Temporal Score: 6.7
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS Score Source: CVE-2026-25243
CVSS v3
Risk Factor: High
Base Score: 8.8
Temporal Score: 7.7
Vector: CVSS:3.0/AV:N/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
CVSS v4
Risk Factor: High
Base Score: 7.7
Threat Score: 5.2
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:valkey-debugsource, p-cpe:/a:amazon:linux:valkey-debuginfo, p-cpe:/a:amazon:linux:valkey, p-cpe:/a:amazon:linux:valkey-devel, cpe:/o:amazon:linux:2023
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 5/26/2026
Vulnerability Publication Date: 5/5/2026