CVE & CISA-KEV Catalog

CVE-2026-39830

HIGH
9.1
CVSS v3
NVD

Description

A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.

CWE-119Buffer OverflowCWE-772

How to fix

Remediation Available
golang-go.cryptoDebian
Fixed in:1:0.52.0-1CVE-2026-39830
aardvark-dns-2:1.10.1Red Hat / RHEL
Fixed in:2.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.src::container-tools:rhel8RHSA-2026:35833
aardvark-dns-2:1.10.1Rocky
Fixed in:2.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.src::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
aardvark-dns-2:1.5.0Red Hat / RHEL
Fixed in:2.module+el8.8.0+23884+2031fc78.src::container-tools:rhel8RHSA-2026:49944
Fixed in:2.module+el8.8.0+23884+2031fc78.x86_64::container-tools:rhel8RHSA-2026:49944
Fixed in:2.module+el8.8.0+23884+2031fc78.ppc64le::container-tools:rhel8RHSA-2026:49944
aardvark-dns-2:1.5.0Rocky
Fixed in:2.module+el8.8.0+23884+2031fc78.ppc64le::container-tools:rhel8RHSA-2026:49944
Fixed in:2.module+el8.8.0+23884+2031fc78.x86_64::container-tools:rhel8RHSA-2026:49944
Fixed in:2.module+el8.8.0+23884+2031fc78.src::container-tools:rhel8RHSA-2026:49944
buildahRocky
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
buildahRed Hat / RHEL
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
buildah-1:1.29.8Rocky
Fixed in:1.module+el8.8.0+24545+b713e821.x86_64::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.src::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.ppc64le::container-tools:rhel8RHSA-2026:49944
buildah-1:1.29.8Red Hat / RHEL
Fixed in:1.module+el8.8.0+24545+b713e821.ppc64le::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.src::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.x86_64::container-tools:rhel8RHSA-2026:49944
buildah-2:1.33.14Rocky
Fixed in:4.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.src::container-tools:rhel8RHSA-2026:35833
buildah-2:1.33.14Red Hat / RHEL
Fixed in:4.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.src::container-tools:rhel8RHSA-2026:35833
buildah-debuginfoRed Hat / RHEL
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
buildah-debuginfoRocky
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
buildah-debuginfo-1:1.29.8Rocky
Fixed in:1.module+el8.8.0+24545+b713e821.ppc64le::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.x86_64::container-tools:rhel8RHSA-2026:49944
buildah-debuginfo-1:1.29.8Red Hat / RHEL
Fixed in:1.module+el8.8.0+24545+b713e821.ppc64le::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.x86_64::container-tools:rhel8RHSA-2026:49944
buildah-debuginfo-2:1.33.14Red Hat / RHEL
Fixed in:4.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
buildah-debuginfo-2:1.33.14Rocky
Fixed in:4.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
buildah-debugsourceRed Hat / RHEL
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
buildah-debugsourceRocky
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
buildah-debugsource-1:1.29.8Rocky
Fixed in:1.module+el8.8.0+24545+b713e821.x86_64::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.ppc64le::container-tools:rhel8RHSA-2026:49944
buildah-debugsource-1:1.29.8Red Hat / RHEL
Fixed in:1.module+el8.8.0+24545+b713e821.ppc64le::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.x86_64::container-tools:rhel8RHSA-2026:49944
buildah-debugsource-2:1.33.14Rocky
Fixed in:4.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
buildah-debugsource-2:1.33.14Red Hat / RHEL
Fixed in:4.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
buildah-testsRed Hat / RHEL
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
buildah-testsRocky
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
buildah-tests-1:1.29.8Rocky
Fixed in:1.module+el8.8.0+24545+b713e821.ppc64le::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.x86_64::container-tools:rhel8RHSA-2026:49944
buildah-tests-1:1.29.8Red Hat / RHEL
Fixed in:1.module+el8.8.0+24545+b713e821.ppc64le::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.x86_64::container-tools:rhel8RHSA-2026:49944
buildah-tests-2:1.33.14Rocky
Fixed in:4.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
buildah-tests-2:1.33.14Red Hat / RHEL
Fixed in:4.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
buildah-tests-debuginfoRed Hat / RHEL
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455
Fixed in:2:1.43.1-2.el9_8RHSA-2026:29455

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityNone
AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H/E:U

Exploit Intelligence

0.62%probability of exploitation in 30 days
47thpercentile

Moderate risk: more likely to be exploited than 47% of all known CVEs.

References

Vendor Advisory1
Issue Tracking3
Mailing List1

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-4966Critical9.4100%KEV + RansomFix
CVE-2017-11882High7.8100%KEV + Ransom-
CVE-2020-0796Critical10.0100%KEV + Ransom-
CVE-2008-4250Critical9.899%KEV-
CVE-2017-15944Critical9.898%KEVFix
CVE-2015-0014High10.097%--

Common questions

How do I fix CVE-2026-39830?

Published advisories record a fix for 359 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-39830 being actively exploited?

Not that we know of. CVE-2026-39830 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.62% is the estimated probability that it will be exploited in the next 30 days. That is higher than 47% of all scored CVEs.

How severe is CVE-2026-39830?

CVE-2026-39830 has a CVSS v3 base score of 9.1, rated important. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-39830 affect?

Published advisories record a fix for golang-go.crypto (Debian), aardvark-dns-2:1.10.1 (Red Hat / RHEL), aardvark-dns-2:1.10.1 (Rocky), aardvark-dns-2:1.5.0 (Red Hat / RHEL), and 355 more. The list on this page is capped, so there may be more.

Embed a live status badge for CVE-2026-39830
CVE-2026-39830 severity badge

Markdown

[![CVE-2026-39830](https://tridentstack.com/cve/badge/CVE-2026-39830.svg)](https://tridentstack.com/cve/CVE-2026-39830)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-39830"><img src="https://tridentstack.com/cve/badge/CVE-2026-39830.svg" alt="CVE-2026-39830"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it worksStart freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-25.