CVE-2026-39836
Panic in Dial and LookupPort when handling NUL byte on Windows in net
CVE-2026-39836 is fixed in 13 products on 2 platforms, first by Go Programming Language 1.26.3, released May 7, 2026. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
7.5
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0063
50th percentile
The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Go Programming Language | 1.26.3 | Go Programming Language 1.26.3 | May 7, 2026 |
| Linux | |||
| delve · RHEL 8 | 0:1.25.2-1.module+el8.10.0+23746+9db33b5e | RHSA-2026:22112 | Jun 1, 2026 |
| delve · almalinux 8 | 1.25.2-1.module_el8.10.0+4074+24330916 | ALSA-2026:22112 | Jun 1, 2026 |
| delve · ol 8 | 0:1.25.2-1.0.1.module+el8.10.0+90715+2d4d8dfd | ELSA-2026-22112 | Jun 2, 2026 |
| delve · rocky 8 | 0:1.25.2-1.module+el8.10.0+40035+ee0a7047 | RLSA-2026:22112 | Aug 26, 2026 |
| go-toolset · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| go-toolset · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| go-toolset · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| go-toolset · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| go-toolset · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| go-toolset · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| go-toolset · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| go1.25-openssl · opensuse-leap 16.0 | 1.25.12-160000.1.1 | OPENSUSE-SU-2026:21319-1 | Jul 13, 2026 |
| go1.25-openssl · sles 16.0 | 1.25.12-160000.1.1 | SUSE-SU-2026:22638-1 | Jul 13, 2026 |
| go1.26-openssl · opensuse-leap 16.0 | 1.26.4-160000.1.1 | OPENSUSE-SU-2026:21254-1 | Jul 7, 2026 |
| go1.26-openssl · sles 16.0 | 1.26.4-160000.1.1 | SUSE-SU-2026:22572-1 | Jul 7, 2026 |
| golang · RHEL 10 | 1.26.3-4.el10_2 | RHSA-2026:22120 | May 7, 2026 |
| golang · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang · rocky 10 | 0:1.26.3-4.el10_2 | RLSA-2026:22120 | Aug 26, 2026 |
| golang · rocky 8 | 0:1.25.10-1.module+el8.10.0+40200+0fd0f175 | RLSA-2026:22112 | Aug 26, 2026 |
| golang · rocky 9 | 0:1.26.3-1.el9_8 | RLSA-2026:22121 | Aug 26, 2026 |
| golang-bin · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-bin · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-bin · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-bin · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-bin · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-bin · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-bin · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-docs · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-docs · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-docs · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-docs · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-docs · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-docs · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-docs · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-misc · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-misc · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-misc · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-misc · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-misc · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-misc · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-misc · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-race · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-race · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-race · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-race · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-race · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-race · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-race · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-src · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-src · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-src · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-src · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-src · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-src · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-src · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-tests · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-tests · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-tests · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-tests · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-tests · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-tests · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-tests · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | OPENSUSE-SU-2026:21483-1 | Jul 30, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.