Buffer Overflow vulnerability in authfile.c memcached 1.6.9 allows attackers to cause a…
Priority MEDIUM 58CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Deferred Red Hat: fix deferred
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.
Summary
Buffer Overflow vulnerability in authfile.c memcached 1.6.9 allows attackers to cause a denial of service via crafted authenticattion file.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00363 30th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Deferred Red Hat: fix deferred
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenStack Platform 13 (Queens) | Affected | No fix planned: Out of support scope |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2021-37519
- 2026-10-03 Alias added: GHSA-5pff-p34f-mm94
References
More Memcached vulnerabilities
- TI-2018-15768 Memcached version 1.5.5 contains an Insufficient Control of Network Message Volume… CVSS 3.0HIGH 7.5
- TI-2020-14353 Memcached 1.6.0 before 1.6.3 allows remote attackers to cause a denial of service (daemon… CVSS 3.1HIGH 7.5
- TI-2016-07164 Integer overflow in Memcached CVSS 3.0HIGH 8.1
- TI-2016-07162 Integer overflow in Memcached CVSS 3.0CRITICAL 9.8
- TI-2016-07163 Integer overflow in Memcached CVSS 3.0CRITICAL 9.8
- TI-2020-08812 Memcached 1.6.x before 1.6.2 allows remote attackers to cause a denial of service (daemon… CVSS 3.1HIGH 7.5
Sources
- CVE-2021-37519 · CVE Program
- CVE-2021-37519 · NVD
- FIRST EPSS
- GHSA-5pff-p34f-mm94 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-37519 · Red Hat security data · CC BY 4.0
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