CVE-2021-38561
No exploitation reported by the sources we read.
- Published2022-12-26
- Fixed in0.3.7
- WeaknessCWE-125
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « 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
golang.org/x/text/language in golang.org/x/text before 0.3.7 can panic with an out-of-bounds read during BCP 47 language tag parsing. Index calculation is mishandled. If parsing untrusted user input, this can be used as a vector for a denial-of-service attack.
Timeline
dates in UTC- 2022-12-2606:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-38561?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-38561?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 0.3 | < 0.3.7 | 0.3.7 | NVD · OSV |
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
Red Hat Security Advisory: OpenShift Container Platform 4.13.0 security update
Red Hat Security Advisory: OpenShift Container Platform 4.13.0 security update
Red Hat Security Advisory: OpenShift Container Platform 4.11.34 bug fix and security update
Red Hat Security Advisory: OpenShift Container Platform 4.12.9 security update
Red Hat Security Advisory: OpenShift Container Platform 4.11.27 security update
Red Hat Security Advisory: OpenShift Container Platform 4.11.26 security update
9 more advisories
Fix
- Update Golang text to 0.3.7
- Vendor fix Red Hat Product Security RHSA-2023:1328 · 4 productsSee the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.13/release_notes/ocp-4-13-release-notes.html Details on how t…
- Vendor fix Red Hat Product Security RHSA-2023:1326 · 4 productsFor OpenShift Container Platform 4.13 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.13/release_notes/ocp-4-1…
- Vendor fix Red Hat Product Security RHSA-2023:1504 · 608 productsFor OpenShift Container Platform 4.11 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.11/release_notes/ocp-4-1…
- Vendor fix Red Hat Product Security RHSA-2023:1409 · 4 productsFor OpenShift Container Platform 4.12 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.12/release_notes/ocp-4-1…
- Vendor fix Red Hat Product Security RHSA-2023:0408 · 8 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
Advisories and patches
- deps.devPatch
- go.googlesource.comPatch · Vendor Advisory
- pkg.go.devVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2022-12-26
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-38561?
Is CVE-2021-38561 actively exploited?
What is the CVSS score for CVE-2021-38561?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.