ALAS2023-2026-1564: amazon-efs-utils security update

ALAS2023-2026-1564, released April 13, 2026, fixes 5 CVEs in amazon-efs-utils (version 3.0.0-4.amzn2023). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

7.5

Base score, 0 to 10

Highest EPSS

0.0108

65th percentile

Priority of the 5 CVEs

Patch now 0
                                Urgent 0
                                High 3
                                Routine 2

Fixed package versions

Product	Release	Fixed in
amazon-efs-utils	amzn 2023	3.0.0-4.amzn2023

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-3338	PKCS7_verify Signature Validation Bypass in AWS-LC	7.5	0.0078	None reported
High	CVE-2026-3336	PKCS7_verify Certificate Chain Validation Bypass in AWS-LC	7.5	0.0074	None reported
High	CVE-2026-4428	amazon-efs-utils: A logic error in CRL distribution point validation in AWS-LC before 1.71.0 causes partitioned CRLs to be incorrectly...	n/a	0.0026	None reported
Routine	CVE-2026-3337	task: task: AWS-LC: Information disclosure via timing discrepancy in AES-CCM decryption	n/a	0.0108	None reported
Routine	CVE-2026-25727	rustup: time: parsing of user-provided input by the RFC 2822 date parser can lead to stack exhaustion	6.5	0.0033	None reported

Also fixes CVE-2026-3338

ALAS2023-2026-1510
mount-s3, mount-s3-debuginfo, mount-s3-debugsource on amzn 2023
FEDORA-2026-EB2FC8E93D
task, task-debuginfo, task-debugsource on Fedora 43

Vendor advisory

https://alas.aws.amazon.com/AL2023/ALAS-2026-1564.html

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