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Golang go.crypto: An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing…
Severity: mediumType: vulnerabilityCVE-2026-39827
An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.
EPSS 0.3%top 80%
Golang go.crypto: An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing…
0
MediumVulnerabilityCVE-2026-39827gcveosvubuntu-cve-2026-39827ubuntu-pro-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-22-04-ltsubuntu-pro-22-04-ltsubuntu-24-04-ltsubuntu-pro-24-04-ltsubuntu-25-10ubuntu-26-04-ltsubuntu-pro-26-04-lts
Published: 05/22/2026 (05/22/2026, 04:16:00 UTC)
Source: GCVE Database
Product: golang-go.crypto
Description
An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.
CVSS v3.1
Score 6.5medium
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected software
golang-go.crypto
pkg:deb/ubuntu/golang-go.crypto@1:0.0~git20151201.0.7b85b09-2ubuntu0.1~esm3?arch=source&distro=esm-infra-legacy/xenialAffected versions
=1:0.0~git20150608-1=1:0.0~git20151201.0.7b85b09-2=1:0.0~git20151201.0.7b85b09-2ubuntu0.1~esm1=1:0.0~git20151201.0.7b85b09-2ubuntu0.1~esm2=1:0.0~git20151201.0.7b85b09-2ubuntu0.1~esm3
lxd
pkg:deb/ubuntu/[email protected]~16.04.4+esm3?arch=source&distro=esm-infra-legacy/xenialAffected versions
=0.20-0ubuntu4=0.21-0ubuntu3=0.21-0ubuntu5=0.22-0ubuntu1=0.22-0ubuntu2=0.23-0ubuntu1=0.23-0ubuntu2=0.23-0ubuntu3=0.24-0ubuntu2=0.24-0ubuntu3=0.24-0ubuntu4=0.25-0ubuntu1=0.26-0ubuntu2=0.26-0ubuntu3=0.27-0ubuntu1=0.27-0ubuntu2=2.0.0~beta1-0ubuntu3=2.0.0~beta1-0ubuntu4=2.0.0~beta2-0ubuntu1=2.0.0~beta2-0ubuntu2=2.0.0~beta3-0ubuntu1=2.0.0~beta3-0ubuntu2=2.0.0~beta3-0ubuntu3=2.0.0~beta3-0ubuntu4=2.0.0~beta4-0ubuntu1=2.0.0~beta4-0ubuntu2=2.0.0~beta4-0ubuntu3=2.0.0~beta4-0ubuntu4=2.0.0~beta4-0ubuntu5=2.0.0~beta4-0ubuntu6=2.0.0~beta4-0ubuntu7=2.0.0~rc1-0ubuntu1=2.0.0~rc1-0ubuntu2=2.0.0~rc1-0ubuntu3=2.0.0~rc2-0ubuntu2=2.0.0~rc2-0ubuntu3=2.0.0~rc3-0ubuntu1=2.0.0~rc3-0ubuntu2=2.0.0~rc3-0ubuntu3=2.0.0~rc3-0ubuntu4=2.0.0~rc4-0ubuntu1=2.0.0~rc5-0ubuntu1=2.0.0~rc6-0ubuntu1=2.0.0~rc6-0ubuntu2=2.0.0~rc7-0ubuntu1=2.0.0~rc7-0ubuntu2=2.0.0~rc8-0ubuntu1=2.0.0~rc8-0ubuntu2=2.0.0~rc8-0ubuntu3=2.0.0~rc8-0ubuntu5=2.0.0~rc8-0ubuntu6=2.0.0~rc8-0ubuntu7=2.0.0~rc9-0ubuntu2=2.0.0~rc9-0ubuntu3=2.0.0~rc9-0ubuntu4=2.0.0~rc9-0ubuntu5=2.0.0-0ubuntu1=2.0.0-0ubuntu2=2.0.0-0ubuntu3=2.0.0-0ubuntu4=2.0.1-0ubuntu1~16.04.1=2.0.2-0ubuntu1~16.04.1=2.0.3-0ubuntu1~ubuntu16.04.2=2.0.4-0ubuntu1~ubuntu16.04.1=2.0.5-0ubuntu1~ubuntu16.04.1=2.0.8-0ubuntu1~ubuntu16.04.1=2.0.8-0ubuntu1~ubuntu16.04.2=2.0.9-0ubuntu1~16.04.1=2.0.9-0ubuntu1~16.04.2=2.0.10-0ubuntu1~16.04.1=2.0.10-0ubuntu1~16.04.2=2.0.11-0ubuntu1~16.04.2=2.0.11-0ubuntu1~16.04.4=2.0.11-0ubuntu1~16.04.4+esm1=2.0.11-0ubuntu1~16.04.4+esm2=2.0.11-0ubuntu1~16.04.4+esm3
snapd
pkg:deb/ubuntu/[email protected]+esm4?arch=source&distro=esm-infra-legacy/xenialAffected versions
=1.9=1.9.1.1=1.9.2=2.0=2.0.1=2.0.2=2.0.3=2.0.5=2.0.8=2.0.9=2.0.10=2.11+0.16.04=2.12+0.16.04=2.13=2.14.2~16.04=2.15.2ubuntu1=2.16ubuntu3=2.17.1ubuntu1=2.20.1ubuntu1=2.21=2.22.2=2.22.3=2.22.6=2.23.1=2.24.1=2.25=2.26.10=2.27.5=2.28.5=2.29.4.2=2.32.3.2=2.32.9=2.33.1ubuntu2=2.34.2=2.34.2ubuntu0.1=2.37.4=2.37.4ubuntu0.1=2.38=2.39.2=2.39.2ubuntu0.2=2.40=2.42.1=2.45.1=2.45.1ubuntu0.2=2.46.1=2.47.1=2.48=2.48.3=2.54.3+16.04~esm2=2.54.3+16.04.0ubuntu0.1~esm3=2.54.3+16.04.0ubuntu0.1~esm4=2.54.3+16.04.0ubuntu0.1~esm5=2.54.3+16.04.0ubuntu0.1~esm6=2.61.4ubuntu0.16.04.1+esm1=2.61.4ubuntu0.16.04.1+esm2=2.61.4ubuntu0.16.04.1+esm4
google-guest-agent
pkg:deb/ubuntu/[email protected]~16.04.0+esm3?arch=source&distro=esm-apps-legacy/xenialAffected versions
=20201217.02-0ubuntu1~16.04.0=20230426.00-0ubuntu2~16.04.3=20231004.02-0ubuntu1~16.04.1=20231004.02-0ubuntu1~16.04.2=20240716.00-0ubuntu1~16.04.0=20240716.00-0ubuntu1~16.04.0+esm1=20240716.00-0ubuntu1~16.04.0+esm2=20240716.00-0ubuntu1~16.04.0+esm3
lxd
pkg:deb/ubuntu/[email protected]~18.04.2+esm3?arch=source&distro=esm-infra/bionicAffected versions
=2.18-0ubuntu6=2.19-0ubuntu1=2.20-0ubuntu3=2.20-0ubuntu4=2.21-0ubuntu1=2.21-0ubuntu2=2.21-0ubuntu3=2.21-0ubuntu4=3.0.0~beta2-0ubuntu3=3.0.0~beta3-0ubuntu3=3.0.0~beta5-0ubuntu2=3.0.0~beta7-0ubuntu1=3.0.0-0ubuntu1=3.0.0-0ubuntu2=3.0.0-0ubuntu3=3.0.0-0ubuntu4=3.0.1-0ubuntu1~18.04.1=3.0.2-0ubuntu1~18.04.1=3.0.3-0ubuntu1~18.04.1=3.0.3-0ubuntu1~18.04.2=3.0.3-0ubuntu1~18.04.2+esm1=3.0.3-0ubuntu1~18.04.2+esm2=3.0.3-0ubuntu1~18.04.2+esm3
snapd
pkg:deb/ubuntu/[email protected]+esm4?arch=source&distro=esm-infra/bionicAffected versions
=2.28.5+17.10=2.29.4.1+18.04=2.29.4.2+18.04=2.31.1+18.04=2.32+18.04~pre5=2.32+18.04~pre6=2.32+18.04=2.32.3.2+18.04=2.32.5+18.04=2.32.8+18.04=2.32.9+18.04=2.33.1+18.04ubuntu2=2.34.2+18.04=2.34.2+18.04.1=2.37.1+18.04=2.37.1.1+18.04=2.37.4+18.04=2.37.4+18.04.1=2.38+18.04=2.39.2+18.04=2.40+18.04=2.42.1+18.04=2.45.1+18.04=2.45.1+18.04.2=2.46.1+18.04=2.47.1+18.04=2.48+18.04=2.48.3+18.04=2.49.2+18.04=2.51.1+18.04=2.54.2+18.04ubuntu1=2.54.3+18.04=2.54.3+18.04.2ubuntu0.1=2.54.3+18.04.2ubuntu0.2=2.55.5+18.04=2.57.5+18.04=2.57.5+18.04ubuntu0.1=2.58+18.04=2.58+18.04.1=2.61.4ubuntu0.18.04.1+esm1=2.61.4ubuntu0.18.04.1+esm2=2.61.4ubuntu0.18.04.1+esm4
golang-go.crypto
pkg:deb/ubuntu/golang-go.crypto@1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm3?arch=source&distro=esm-apps/bionicAffected versions
=1:0.0~git20170629.0.5ef0053-1ubuntu1=1:0.0~git20170629.0.5ef0053-1ubuntu2=1:0.0~git20170629.0.5ef0053-2=1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm1=1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm2=1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm3
google-guest-agent
pkg:deb/ubuntu/[email protected]~18.04.0+esm3?arch=source&distro=esm-apps/bionicAffected versions
=20201217.02-0ubuntu1~18.04.0=20210414.00-0ubuntu1~18.04.0=20210629.00-0ubuntu1~18.04.1=20220622.00-0ubuntu2~18.04.0=20220622.00-0ubuntu2~18.04.1=20230426.00-0ubuntu2~18.04.0=20231004.02-0ubuntu1~18.04.2=20231004.02-0ubuntu1~18.04.3=20240716.00-0ubuntu1~18.04.0=20241011.01-0ubuntu1~18.04.0=20241011.01-0ubuntu1~18.04.0+esm1=20241011.01-0ubuntu1~18.04.0+esm2=20241011.01-0ubuntu1~18.04.0+esm3
google-guest-agent
pkg:deb/ubuntu/[email protected]~20.04.0+esm3?arch=source&distro=esm-infra/focalAffected versions
=20201217.02-0ubuntu1~20.04.0=20210414.00-0ubuntu1~20.04.0=20210629.00-0ubuntu1~20.04.0=20220622.00-0ubuntu2~20.04.0=20220622.00-0ubuntu2~20.04.2=20230426.00-0ubuntu2~20.04.0=20231004.02-0ubuntu1~20.04.1=20231004.02-0ubuntu1~20.04.2=20231004.02-0ubuntu1~20.04.3=20231004.02-0ubuntu1~20.04.4=20240716.00-0ubuntu1~20.04.0=20241011.01-0ubuntu1~20.04.1=20250116.00-0ubuntu1~20.04.0=20250116.00-0ubuntu1~20.04.0+esm1=20250116.00-0ubuntu1~20.04.0+esm2=20250116.00-0ubuntu1~20.04.0+esm3
snapd
pkg:deb/ubuntu/[email protected]+20.04ubuntu1~esm3?arch=source&distro=esm-infra/focalAffected versions
=2.41+19.10.1=2.42.1+20.04=2.43.3+git1.8109f8=2.44~pre1+20.04=2.44+20.04=2.44.2+20.04=2.44.3+20.04=2.45.1+20.04=2.45.1+20.04.2=2.46.1+20.04=2.47.1+20.04=2.48+20.04=2.48.3+20.04=2.49.2+20.04=2.51.1+20.04ubuntu2=2.54.2+20.04ubuntu2=2.54.3+20.04=2.54.3+20.04.1=2.54.3+20.04.1ubuntu0.1=2.54.3+20.04.1ubuntu0.2=2.54.3+20.04.1ubuntu0.3=2.55.5+20.04=2.57.5+20.04=2.57.5+20.04ubuntu0.1=2.58+20.04=2.58+20.04.1=2.61.3+20.04=2.62+20.04=2.63+20.04=2.63+20.04ubuntu0.1=2.65.3+20.04=2.66.1+20.04=2.67.1+20.04=2.67.1+20.04ubuntu1~esm1=2.67.1+20.04ubuntu1~esm3
golang-go.crypto
pkg:deb/ubuntu/golang-go.crypto@1:0.0~git20200221.2aa609c-1ubuntu0.1~esm3?arch=source&distro=esm-apps/focalAffected versions
=1:0.0~git20190701.4def268-2=1:0.0~git20200221.2aa609c-1=1:0.0~git20200221.2aa609c-1ubuntu0.1~esm1=1:0.0~git20200221.2aa609c-1ubuntu0.1~esm2=1:0.0~git20200221.2aa609c-1ubuntu0.1~esm3
google-guest-agent
pkg:deb/ubuntu/[email protected]~22.04.3?arch=source&distro=jammyAffected versions
=20210629.00-0ubuntu1=20210629.00-0ubuntu2=20220104.00-0ubuntu1=20220104.00-0ubuntu2=20220622.00-0ubuntu2~22.04.0=20220622.00-0ubuntu2~22.04.1=20230426.00-0ubuntu2~22.04.0=20231004.02-0ubuntu1~22.04.1=20231004.02-0ubuntu1~22.04.2=20231004.02-0ubuntu1~22.04.3=20231004.02-0ubuntu1~22.04.4=20231004.02-0ubuntu1~22.04.5=20240716.00-0ubuntu1~22.04.0=20241011.01-0ubuntu1~22.04.0=20250116.00-0ubuntu1~22.04.0=20250116.00-0ubuntu1~22.04.1=20250116.00-0ubuntu1~22.04.2=20250116.00-0ubuntu1~22.04.3
snapd
pkg:deb/ubuntu/[email protected]+ubuntu22.04.1?arch=source&distro=jammyAffected versions
=2.53+21.10ubuntu1=2.54.2+22.04ubuntu1=2.54.2+22.04ubuntu2=2.54.2+22.04ubuntu3=2.54.3+git19.g868fc21+22.04=2.54.3+git26.g360067e+22.04=2.55.2+22.04=2.55.2+22.04.1=2.55.3+22.04=2.55.3+22.04ubuntu1=2.55.5+22.04=2.56.2+22.04ubuntu1=2.57.4+22.04=2.57.5+22.04=2.57.5+22.04ubuntu0.1=2.58+22.04=2.58+22.04.1=2.61.3+22.04=2.62+22.04=2.63+22.04=2.63+22.04ubuntu0.1=2.65.3+22.04=2.66.1+22.04=2.67.1+22.04=2.68.5+ubuntu22.04.1=2.71+ubuntu22.04=2.72+ubuntu22.04=2.73+ubuntu22.04=2.73+ubuntu22.04.1=2.74.1+ubuntu22.04.4=2.75.2+ubuntu22.04=2.76+ubuntu22.04=2.76+ubuntu22.04.1
golang-go.crypto
pkg:deb/ubuntu/golang-go.crypto@1:0.0~git20211202.5770296-1ubuntu0.1~esm3?arch=source&distro=esm-apps/jammyAffected versions
=1:0.0~git20201221.eec23a3-1=1:0.0~git20211202.5770296-1=1:0.0~git20211202.5770296-1ubuntu0.1~esm1=1:0.0~git20211202.5770296-1ubuntu0.1~esm2=1:0.0~git20211202.5770296-1ubuntu0.1~esm3
google-guest-agent
pkg:deb/ubuntu/[email protected]~24.04.4?arch=source&distro=nobleAffected versions
=20230426.00-0ubuntu3=20231004.02-0ubuntu1=20231004.02-0ubuntu3=20240213.00-0ubuntu1=20240213.00-0ubuntu2=20240213.00-0ubuntu3=20240213.00-0ubuntu3.1=20240213.00-0ubuntu3.2=20240716.00-0ubuntu1~24.04.0=20240716.00-0ubuntu1~24.04.1=20241011.01-0ubuntu1~24.04.0=20250116.00-0ubuntu1~24.04.0=20250116.00-0ubuntu1~24.04.1=20250116.00-0ubuntu1~24.04.2=20250116.00-0ubuntu1~24.04.3=20250116.00-0ubuntu1~24.04.4
snapd
pkg:deb/ubuntu/[email protected]+ubuntu24.04.1?arch=source&distro=nobleAffected versions
=2.60.4+23.10=2.61.3+24.04=2.62+24.04build1=2.63+24.04=2.63+24.04ubuntu0.1=2.63.1+24.04=2.65.3+24.04=2.66.1+24.04=2.67.1+24.04=2.68.5+ubuntu24.04.1=2.71+ubuntu24.04=2.72+ubuntu24.04=2.73+ubuntu24.04=2.73+ubuntu24.04.1=2.73+ubuntu24.04.2=2.74.1+ubuntu24.04.4=2.75.2+ubuntu24.04=2.76+ubuntu24.04=2.76+ubuntu24.04.1
golang-go.crypto
pkg:deb/ubuntu/golang-go.crypto@1:0.19.0-1ubuntu0.1~esm3?arch=source&distro=esm-apps/nobleAffected versions
=1:0.4.0-1=1:0.17.0-1=1:0.18.0-1=1:0.19.0-1=1:0.19.0-1ubuntu0.1~esm1=1:0.19.0-1ubuntu0.1~esm2=1:0.19.0-1ubuntu0.1~esm3
golang-go.crypto
pkg:deb/ubuntu/golang-go.crypto@1:0.25.0-1ubuntu0.1?arch=source&distro=questingAffected versions
=1:0.25.0-1=1:0.25.0-1ubuntu0.1
google-guest-agent
pkg:deb/ubuntu/[email protected]?arch=source&distro=questingAffected versions
=20250116.00-0ubuntu2=20250506.01-0ubuntu1=20250506.01-0ubuntu1.1=20250506.01-0ubuntu1.2
snapd
pkg:deb/ubuntu/[email protected]+ubuntu25.10?arch=source&distro=questingAffected versions
=2.67.1+25.04=2.68.5+ubuntu25.10.2=2.71+ubuntu25.10=2.71.1+ubuntu25.10.1=2.72+ubuntu25.10.2=2.73+ubuntu25.10=2.73+ubuntu25.10.1=2.74.1+ubuntu25.10.4=2.75.2+ubuntu25.10
google-guest-agent
pkg:deb/ubuntu/[email protected]?arch=source&distro=resoluteAffected versions
=20250506.01-0ubuntu1=20250506.01-0ubuntu2=20250506.01-0ubuntu2.1
snapd
pkg:deb/ubuntu/[email protected]+ubuntu26.04.3?arch=source&distro=resoluteAffected versions
=2.71.1+ubuntu25.10.1=2.72+ubuntu26.04.1=2.73+ubuntu26.04.1=2.74+ubuntu26.04=2.74.1+ubuntu26.04=2.74.1+ubuntu26.04.3=2.74.1+ubuntu26.04.4=2.75.2+ubuntu26.04.2=2.76+ubuntu26.04.2=2.76+ubuntu26.04.3
golang-go.crypto
pkg:deb/ubuntu/golang-go.crypto@1:0.47.0-1ubuntu0.1~esm1?arch=source&distro=esm-apps/resoluteAffected versions
=1:0.25.0-1=1:0.45.0-1=1:0.47.0-1=1:0.47.0-1ubuntu0.1~esm1
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-39827
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS","Ubuntu:Pro:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a5fd0891010f89cc2198478
Added to database: 07/21/2026, 20:03:21 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 22
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