FKIE_CVE-2026-81934
Vulnerability from fkie_nvd - Published: 2026-08-27 20:18 - Updated: 2026-08-31 20:17
Severity
Summary
Redis contains a use-after-free vulnerability in the 'tlsProcessPendingData()' function, which handles the TLS pending-data list if Redis is configured with TLS support. A remote, unauthenticated attacker may be able to execute arbitrary commands with the privileges of the Redis server.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unknown",
"product": "Redis",
"vendor": "Redis",
"versions": [
{
"status": "unaffected",
"version": "8.2.9"
},
{
"status": "unaffected",
"version": "8.4.6"
},
{
"status": "unaffected",
"version": "8.6.6"
},
{
"status": "unaffected",
"version": "8.8.2"
},
{
"status": "unaffected",
"version": "8.10.1"
},
{
"status": "unaffected",
"version": "7.4.11"
},
{
"status": "unaffected",
"version": "6.2.24"
},
{
"status": "unaffected",
"version": "7.2.16"
},
{
"lessThan": "8.8.2",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "8.2.9",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "8.4.6",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "8.6.6",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "8.10.1",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "7.4.11",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "6.2.24",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "7.2.16",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "Redis Software (Enterprise)",
"vendor": "Redis",
"versions": [
{
"status": "unaffected",
"version": "8.2.0-46"
},
{
"status": "unaffected",
"version": "8.0.20-96"
},
{
"status": "unaffected",
"version": "7.22.2-179"
},
{
"status": "unaffected",
"version": "7.8.6-303"
},
{
"lessThan": "8.2.0-46",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "8.0.20-96",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "7.22.2-179",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "7.8.6-303",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"source": "9119a7d8-5eab-497f-8521-727c672e3725"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Redis contains a use-after-free vulnerability in the \u0027tlsProcessPendingData()\u0027 function, which handles the TLS pending-data list if Redis is configured with TLS support. A remote, unauthenticated attacker may be able to execute arbitrary commands with the privileges of the Redis server."
}
],
"id": "CVE-2026-81934",
"lastModified": "2026-08-31T20:17:12.093",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.2,
"impactScore": 5.9,
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"type": "Secondary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"attackVector": "ADJACENT",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"ssvcData": {
"id": "CVE-2026-81934",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-27T19:12:51.964039Z",
"version": "2.0.3"
}
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-81934",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-28T15:13:56.058373Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-08-27T20:18:57.350",
"references": [
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://github.com/redis/redis/commit/6d088c335d5c3ec49a6c28486140b498e70b7834"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://github.com/redis/redis/releases/tag/6.2.24"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://github.com/redis/redis/releases/tag/7.2.16"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://github.com/redis/redis/releases/tag/7.4.11"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://github.com/redis/redis/releases/tag/8.10.1"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://github.com/redis/redis/releases/tag/8.2.9"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://github.com/redis/redis/releases/tag/8.4.6"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://github.com/redis/redis/releases/tag/8.6.6"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://github.com/redis/redis/releases/tag/8.8.2"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://github.com/v12-security/pocs/tree/main/redis/server_ssl"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-239-01.json"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://raw.githubusercontent.com/redis/redis/6.2/00-RELEASENOTES"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://raw.githubusercontent.com/redis/redis/7.2/00-RELEASENOTES"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://raw.githubusercontent.com/redis/redis/7.4/00-RELEASENOTES"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://raw.githubusercontent.com/redis/redis/8.10/00-RELEASENOTES"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://raw.githubusercontent.com/redis/redis/8.2/00-RELEASENOTES"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://raw.githubusercontent.com/redis/redis/8.4/00-RELEASENOTES"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://raw.githubusercontent.com/redis/redis/8.6/00-RELEASENOTES"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://raw.githubusercontent.com/redis/redis/8.8/00-RELEASENOTES"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://redis.io/docs/latest/operate/rs/release-notes/rs-7-22-releases/rs-7-22-2-179/"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://redis.io/docs/latest/operate/rs/release-notes/rs-7-8-releases/rs-7-8-6-303/"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://redis.io/docs/latest/operate/rs/release-notes/rs-8-0-releases/rs-8-0-20-96/"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://redis.io/docs/latest/operate/rs/release-notes/rs-8-2-releases/rs-8-2-0-46/"
},
{
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-81934"
}
],
"sourceIdentifier": "9119a7d8-5eab-497f-8521-727c672e3725",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-416"
}
],
"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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