CVE-2021-32564
CVE-2021-32564 is covered by the Apache CVE-2026-112381 security bulletin. Not in the CISA KEV catalog. High advisory severity. 1 advisory from Apache.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
CVE-2021-32564 at a glance
- CISA KEV
- Not listed (catalog checked )
- Highest advisory severity
- High
- Vendor advisories
- 1 from Apache
- VulniPulse record
- Published · Updated
Is CVE-2021-32564 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2021-32564 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2021-32564?
This CVE is tracked through a multi-CVE bulletin, so its fixed releases may differ from the bulletin-wide values below. Check the vendor source.
Vendor advisory comparison
Apache
1 advisory- Advisory severityHigh8.2
High [CVE-2021-32564 +1] Apache Traffic Server can crash with a null pointer dereference when a client POST request is torn down via half-close while a chunked origin response is being reparsed from a reentrant write-ready callback, a timing-dependent race introduced by the CVE-2021-32564 flow-control backports
CVE-2026-112381Source published Source updated
This bulletin covers 2 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.
Apache Traffic Server can crash with a null pointer dereference when a client POST request is torn down via half-close while a chunked origin response is being reparsed from a reentrant write-ready callback, a timing-dependent race introduced by the CVE-2021-32564 flow-control backports. This issue affects Apache Traffic Server: 9.2.15, 10.1.4, 10.2.0. Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.
- Affected products in this advisory
- Apache Traffic Server
- Source-reported affected versions
- 9.2.15
- 10.1.4
- 10.2.0
- Source-reported fixed versions
- 9.2.16
- 10.1.5
- 10.2.1
- Mitigation guidance
- Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.
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