ALAS2023-2026-3273: Security update for 5 packages

ALAS2023-2026-3273, released November 7, 2026, fixes 8 CVEs across 5 products. None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

9.1

Base score, 0 to 10

Highest EPSS

0.0087

58th percentile

Priority of the 8 CVEs

Patch now 0
                                Urgent 0
                                High 5
                                Routine 3

Fixed package versions

Product	Release	Fixed in
containerd	amzn 2023	2.3.7-1.amzn2023.0.1
containerd-debuginfo	amzn 2023	2.3.7-1.amzn2023.0.1
containerd-debugsource	amzn 2023	2.3.7-1.amzn2023.0.1
containerd-stress	amzn 2023	2.3.7-1.amzn2023.0.1
containerd-stress-debuginfo	amzn 2023	2.3.7-1.amzn2023.0.1

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-78659	HTTP/2 server memory exhaustion due to Trailer headers in net/http	7.5	0.0087	None reported
High	CVE-2026-78663	Double flow control refund on HTTP/2 server streams in net/http	9.1	0.0086	None reported
High	CVE-2026-56855	Prevent DoS on deadlocked established channel in golang.org/x/crypto/ssh	7.5	0.0050	None reported
High	CVE-2026-78662	Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh	7.5	0.0043	None reported
High	CVE-2026-95837	containerd: Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-95837: containe...	n/a	0.0011	None reported
Routine	CVE-2026-53493	Containerd has image-pull DoS via crafted OCI index graph amplification	n/a	0.0036	None reported
Routine	CVE-2026-81870	OpenTelemetry-Go: Exporter config logging may leak endpoint URLs in info logs	n/a	0.0027	None reported
Routine	CVE-2026-61801	github.com/moby/sys/user has a possible DoS via unbounded parsing of user and group database files	5.5	0.0012	None reported

Also fixes CVE-2026-78659

SUSE-SU-2026:4866-1
go1.26-openssl on sles 15.6, sles 15.7
OPENSUSE-SU-2026:22093-1
go1.27 on opensuse-leap 16.0
SUSE-SU-2026:24237-1
go1.27 on sles 16.0
SUSE-SU-2026:4625-1
go1.27 on sles 15.6, sles 15.7
OPENSUSE-SU-2026:22095-1
go1.26 on opensuse-leap 16.0
SUSE-SU-2026:24239-1
go1.26 on sles 16.0
SUSE-SU-2026:4629-1
go1.26 on sles 15.6, sles 15.7
ALSA-2026:86196
go-toolset, golang, golang-bin and 5 more on almalinux 9

Vendor advisory

https://alas.aws.amazon.com/AL2023/ALAS-2026-3273.html

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