What’s Vulnerable › Vulnerabilities

CVE-2021-44717

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-01 · updated 2026-06-17
• Weakness: CWE-404

Description

Go before 1.16.12 and 1.17.x before 1.17.5 on UNIX allows write operations to an unintended file or unintended network connection as a consequence of erroneous closing of file descriptor 0 after file-descriptor exhaustion.

Affected products

• Debian Linux: 9.0
• Go: before 1.16.12; from 1.17.0 before 1.17.5 — fixed in 1.16.12, 1.17.5

How to fix

Upgrade to a fixed version: Go 1.16.12, 1.17.5. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-744259.pdf
• https://groups.google.com/g/golang-announce/c/hcmEScgc00k
• https://lists.debian.org/debian-lts-announce/2022/01/msg00016.html
• https://lists.debian.org/debian-lts-announce/2022/01/msg00017.html
• https://lists.debian.org/debian-lts-announce/2023/04/msg00021.html
• https://security.gentoo.org/glsa/202208-02
• https://cert-portal.siemens.com/productcert/pdf/ssa-744259.pdf
• https://groups.google.com/g/golang-announce/c/hcmEScgc00k
• https://lists.debian.org/debian-lts-announce/2022/01/msg00016.html
• https://lists.debian.org/debian-lts-announce/2022/01/msg00017.html
• https://lists.debian.org/debian-lts-announce/2023/04/msg00021.html
• https://security.gentoo.org/glsa/202208-02

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