CVE-2026-39834
Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh
CVE-2026-39834 is fixed in 38 products on 1 platform, first by golang-go.crypto-dev 1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm2, released May 21, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
9.1
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0060
48th percentile
When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| alloy · opensuse-leap 16.0 | 1.17.0-160000.1.1 | OPENSUSE-SU-2026:21251-1 | Jul 7, 2026 |
| alloy · sles 15.7 | 1.17.1-150700.15.23.1 | SUSE-SU-2026:2824-1 | Jul 9, 2026 |
| alloy · sles 16.0 | 1.17.0-160000.1.1 | SUSE-SU-2026:22575-1 | Jul 7, 2026 |
| amazon-cloudwatch-agent · amzn 2023 | 1.300069.1-1.amzn2023 | ALAS2023-2026-2025 | Aug 3, 2026 |
| amazon-ssm-agent · amzn 2023 | 3.3.4624.0-1.amzn2023 | ALAS2023-2026-1952 | Jul 20, 2026 |
| amazon-ssm-agent · opensuse-leap 16.0 | 3.3.4624.0-160000.1.1 | OPENSUSE-SU-2026:21079-1 | Jun 17, 2026 |
| amazon-ssm-agent · sles 15.6 | 3.3.4624.0-150000.5.37.1 | SUSE-SU-2026:2467-1 | Jun 19, 2026 |
| amazon-ssm-agent · sles 15.7 | 3.3.4624.0-150000.5.37.1 | SUSE-SU-2026:2467-1 | Jun 19, 2026 |
| amazon-ssm-agent · sles 16.0 | 3.3.4624.0-160000.1.1 | SUSE-SU-2026:22157-1 | Jun 17, 2026 |
| apptainer · sles 15.7 | 1.5.1-150600.4.24.1 | SUSE-SU-2026:2609-1 | Jun 24, 2026 |
| buildah · sles 15.6 | 1.35.5-150500.3.62.1 | SUSE-SU-2026:2733-1 | Jul 2, 2026 |
| buildah · sles 15.7 | 1.35.5-150500.3.62.1 | SUSE-SU-2026:2733-1 | Jul 2, 2026 |
| cloudflared · opensuse-leap 16.0 | 2026.9.1-bp160.1.1 | OPENSUSE-SU-2026:21924-1 | Sep 21, 2026 |
| containerd · amzn 2023 | 2.2.4-1.amzn2023.0.1 | ALAS2023-2026-1784 | Jun 8, 2026 |
| containerd-debuginfo · amzn 2023 | 2.2.4-1.amzn2023.0.1 | ALAS2023-2026-1784 | Jun 8, 2026 |
| containerd-debugsource · amzn 2023 | 2.2.4-1.amzn2023.0.1 | ALAS2023-2026-1784 | Jun 8, 2026 |
| containerd-stress · amzn 2023 | 2.2.4-1.amzn2023.0.1 | ALAS2023-2026-1784 | Jun 8, 2026 |
| containerd-stress-debuginfo · amzn 2023 | 2.2.4-1.amzn2023.0.1 | ALAS2023-2026-1784 | Jun 8, 2026 |
| containerized-data-importer · sles 15.7 | 1.64.0-150700.9.14.1 | SUSE-SU-2026:4209-1 | Sep 16, 2026 |
| containerized-data-importer1.65 · opensuse-leap 16.0 | 1.65.0-160000.3.1 | OPENSUSE-SU-2026:21824-1 | Sep 9, 2026 |
| cosign · opensuse-leap 16.0 | 3.1.1-160000.1.1 | OPENSUSE-SU-2026:21281-1 | Jul 10, 2026 |
| cosign · sles 15.6 | 3.1.1-150400.3.45.1 | SUSE-SU-2026:2827-1 | Jul 9, 2026 |
| cosign · sles 15.7 | 3.1.1-150400.3.45.1 | SUSE-SU-2026:2827-1 | Jul 9, 2026 |
| cosign · sles 16.0 | 3.1.1-160000.1.1 | SUSE-SU-2026:22613-1 | Jul 10, 2026 |
| distribution · opensuse-leap 16.0 | 3.1.1-160000.1.1 | OPENSUSE-SU-2026:21084-1 | Jun 18, 2026 |
| distribution · sles 15.6 | 3.1.1-150400.9.41.1 | SUSE-SU-2026:4212-1 | Sep 16, 2026 |
| distribution · sles 15.7 | 3.1.1-150400.9.41.1 | SUSE-SU-2026:4212-1 | Sep 16, 2026 |
| distribution · sles 16.0 | 3.1.1-160000.1.1 | SUSE-SU-2026:22159-1 | Jun 18, 2026 |
| glab · opensuse-leap 16.0 | 1.114.0-bp160.1.1 | OPENSUSE-SU-2026:21662-1 | Aug 26, 2026 |
| golang-go.crypto · Debian 14 | 1:0.52.0-1 | DEBIAN-CVE-2026-39834 | May 22, 2026 |
| golang-go.crypto-dev · Ubuntu 18.04.6 LTS (bionic) | 1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm2 | golang-go.crypto-dev 1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm2 | May 21, 2026 |
| golang-golang-x-crypto-dev · Ubuntu 18.04.6 LTS (bionic) | 1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm2 | golang-golang-x-crypto-dev 1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm2 | May 21, 2026 |
| golang-golang-x-crypto-dev · Ubuntu 20.04 LTS (focal) | 1:0.0~git20200221.2aa609c-1ubuntu0.1~esm2 | golang-golang-x-crypto-dev 1:0.0~git20200221.2aa609c-1ubuntu0.1~esm2 | May 21, 2026 |
| golang-golang-x-crypto-dev · Ubuntu 22.04.1 LTS (jammy) | 1:0.0~git20211202.5770296-1ubuntu0.1~esm2 | golang-golang-x-crypto-dev 1:0.0~git20211202.5770296-1ubuntu0.1~esm2 | May 21, 2026 |
| golang-golang-x-crypto-dev · Ubuntu 24.04.5 LTS (noble) | 1:0.19.0-1ubuntu0.1~esm2 | golang-golang-x-crypto-dev 1:0.19.0-1ubuntu0.1~esm2 | May 21, 2026 |
| golang-golang-x-crypto-dev · Ubuntu 26.04.1 LTS (resolute) | 1:0.47.0-1ubuntu0.1~esm1 | golang-golang-x-crypto-dev 1:0.47.0-1ubuntu0.1~esm1 | May 21, 2026 |
| google-guest-agent · Ubuntu 18.04.6 LTS (bionic) | 20241011.01-0ubuntu1~18.04.0+esm3 | google-guest-agent 20241011.01-0ubuntu1~18.04.0+esm3 | May 21, 2026 |
| google-guest-agent · Ubuntu 20.04 LTS (focal) | 20250116.00-0ubuntu1~20.04.0+esm3 | google-guest-agent 20250116.00-0ubuntu1~20.04.0+esm3 | May 21, 2026 |
| google-guest-agent · Ubuntu 22.04.1 LTS (jammy) | 20250116.00-0ubuntu1~22.04.3 | google-guest-agent 20250116.00-0ubuntu1~22.04.3 | May 21, 2026 |
| google-guest-agent · Ubuntu 24.04.5 LTS (noble) | 20250116.00-0ubuntu1~24.04.4 | google-guest-agent 20250116.00-0ubuntu1~24.04.4 | May 21, 2026 |
| google-guest-agent · Ubuntu 25.10 (questing) | 20250506.01-0ubuntu1.2 | google-guest-agent 20250506.01-0ubuntu1.2 | May 21, 2026 |
| google-guest-agent · Ubuntu 26.04.1 LTS (resolute) | 20250506.01-0ubuntu2.1 | google-guest-agent 20250506.01-0ubuntu2.1 | May 21, 2026 |
| google-guest-agent · opensuse-leap 16.0 | 20260529.00-160000.1.1 | OPENSUSE-SU-2026:21069-1 | Jun 26, 2026 |
| google-guest-agent · sles 15.6 | 20260529.00-150000.1.70.1 | SUSE-SU-2026:2612-1 | Jun 24, 2026 |
| google-guest-agent · sles 15.7 | 20260529.00-150000.1.70.1 | SUSE-SU-2026:2612-1 | Jun 24, 2026 |
| google-guest-agent · sles 16.0 | 20260529.00-160000.1.1 | SUSE-SU-2026:22376-1 | Jun 26, 2026 |
| google-osconfig-agent · opensuse-leap 16.0 | 20260615.01-160000.1.2 | OPENSUSE-SU-2026:21210-1 | Jul 6, 2026 |
| google-osconfig-agent · sles 15.6 | 20260615.01-150000.1.55.1 | SUSE-SU-2026:2611-1 | Jun 24, 2026 |
| google-osconfig-agent · sles 15.7 | 20260615.01-150000.1.55.1 | SUSE-SU-2026:2611-1 | Jun 24, 2026 |
| google-osconfig-agent · sles 16.0 | 20260615.01-160000.1.2 | SUSE-SU-2026:22558-1 | Jul 6, 2026 |
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | OPENSUSE-SU-2026:21483-1 | Jul 30, 2026 |
| keepassxc · Fedora 43 | 2.8.0-2.fc43 | FEDORA-2026-4D8F0CDDEF | Nov 7, 2026 |
| keepassxc-debuginfo · Fedora 43 | 2.8.0-2.fc43 | FEDORA-2026-4D8F0CDDEF | Nov 7, 2026 |
| keepassxc-debugsource · Fedora 43 | 2.8.0-2.fc43 | FEDORA-2026-4D8F0CDDEF | Nov 7, 2026 |
| kubevirt · sles 15.7 | 1.7.4-150700.3.30.1 | SUSE-SU-2026:3203-1 | Jul 23, 2026 |
| kubevirt1.8 · opensuse-leap 16.0 | 1.8.4-160000.1.1 | OPENSUSE-SU-2026:21590-1 | Aug 18, 2026 |
| lxd · Ubuntu 18.04.6 LTS (bionic) | 3.0.3-0ubuntu1~18.04.2+esm3 | lxd 3.0.3-0ubuntu1~18.04.2+esm3 | May 21, 2026 |
| lxd-client · Ubuntu 18.04.6 LTS (bionic) | 3.0.3-0ubuntu1~18.04.2+esm3 | lxd-client 3.0.3-0ubuntu1~18.04.2+esm3 | May 21, 2026 |
| lxd-tools · Ubuntu 18.04.6 LTS (bionic) | 3.0.3-0ubuntu1~18.04.2+esm3 | lxd-tools 3.0.3-0ubuntu1~18.04.2+esm3 | May 21, 2026 |
| mcphost · opensuse-leap 16.0 | 0.34.0-160000.2.1 | OPENSUSE-SU-2026:21120-1 | Jun 20, 2026 |
| mcphost · sles 16.0 | 0.34.0-160000.2.1 | SUSE-SU-2026:22193-1 | Jun 20, 2026 |
| nerdctl · amzn 2023 | 2.2.2-1.amzn2023.0.3 | ALAS2023-2026-1788 | Jun 8, 2026 |
| podman · opensuse-leap 16.0 | 5.4.2-160000.5.1 | OPENSUSE-SU-2026:21244-1 | Jul 6, 2026 |
| rclone · amzn 2023 | 1.74.2-80.amzn2023 | ALAS2023-2026-1810 | Jun 8, 2026 |
| rclone · opensuse-leap 16.0 | 1.74.4-bp160.1.1 | OPENSUSE-SU-2026:21436-1 | Jul 22, 2026 |
| rclone-debuginfo · amzn 2023 | 1.74.2-80.amzn2023 | ALAS2023-2026-1810 | Jun 8, 2026 |
| rclone-debugsource · amzn 2023 | 1.74.2-80.amzn2023 | ALAS2023-2026-1810 | Jun 8, 2026 |
| runfinch-finch · amzn 2023 | 1.17.1-1.amzn2023.0.2 | ALAS2023-2026-1809 | Jun 8, 2026 |
| trivy · opensuse-leap 16.0 | 0.71.0-160000.1.1 | OPENSUSE-SU-2026:20956-1 | Jun 11, 2026 |
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