No exploitation reportedFix available

CVE-2021-44717

No exploitation reported by the sources we read.

Published2022-01-01
Fixed in1.17.5 · 1.16.12
WeaknessCWE-404

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2022-01-0105:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-44717?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-44717?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Goversion to verify

Branch	Affected	Fixed in	Source
1.17	≥ 1.17.0, < 1.17.5	1.17.5	NVD
1.16	< 1.16.12	1.16.12	NVD

Debian debian linux

Branch	Affected	Fixed in	Source
9.0	= 9.0	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-23-047-04 CISA1 known affected
Siemens Brownfield Connectivity Gateway
Brownfield Connectivity - Gateway
RHSA-2023:0408 Red Hat Product Security6 products fixed
Red Hat Security Advisory: OpenShift Virtualization 4.12.0 Images security update
RHSA-2023:0407 Red Hat Product Security6 products fixed
Red Hat Security Advisory: OpenShift Virtualization 4.12.0 RPMs security update
RHSA-2022:6526 Red Hat Product Security14 products fixed
Red Hat Security Advisory: OpenShift Virtualization 4.11.0 Images security and bug fix update
RHSA-2022:1372 Red Hat Product Security72 products fixed
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.10.0 enhancement, security & bug fix update
RHSA-2022:1361 Red Hat Product Security5 products fixed
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.10.0 RPM security,enhancement&bugfix update

Full record on NVD

Fix

Update Go to 1.17.5 · 1.16.12
Vendor fix CISA ICSA-23-047-04 · 1 productUpdate to V1.11 or later version Contact customer support to obtain the update <https://support.industry.siemens.com/cs/de/de/view/109801700>
Vendor fix Red Hat Product Security RHSA-2023:0408 · 6 productsBefore applying this update, you must apply all previously released errata relevant to your system. To apply this update, refer to: https://access.redhat.com/articles/11258
Vendor fix Red Hat Product Security RHSA-2023:0407 · 6 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Vendor fix Red Hat Product Security RHSA-2022:1372 · 72 productsFor details on how to apply this update, refer to: https://access.redhat.com/articles/11258
Workaround from the vendor Red Hat Product Security RHSA-2023:0408 · 43 productsThis bug can be mitigated by raising the per-process file descriptor limit.

Advisories and patches

groups.google.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.14.8read 2026-10-23
NVDCVSS 2.05.8read 2026-10-23
NVDweakness (CWE)CWE-404read 2026-10-23
FIRST EPSSEPSS score1.9 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Published: 2022-01-01
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-44717?

Is CVE-2021-44717 actively exploited?

Active exploitation of CVE-2021-44717 has not been confirmed. Its EPSS score was 1.9% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-44717?

CVE-2021-44717 has a CVSS v3 base score of 4.8 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

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