CVE-2026-81934

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{"bugzilla": {"description": "redis: Redis: Arbitrary code execution via TLS pending-data list use-after-free", "id": "2525226", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2525226"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["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.", "A flaw was found in Redis. This vulnerability, a use-after-free, exists within the `tlsProcessPendingData()` function, which manages the Transport Layer Security (TLS) pending-data list when Redis is configured with TLS support. A remote, unauthenticated attacker could exploit this to execute unauthorized commands with the same privileges as the Redis server."], "mitigation": {"lang": "en:us", "value": "For Redis instances where TLS is enabled, consider disabling TLS if it is not strictly required. Alternatively, restrict network access to the Redis server to trusted clients only, using firewall rules or network access controls, to prevent unauthenticated remote attackers from reaching the vulnerable service. If TLS is enabled, a restart of the Redis service may be required for changes to take effect."}, "name": "CVE-2026-81934", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "redis:6/redis", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "redis", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "redis:7/redis", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "boost", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "valkey", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-08-27T19:40:15Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-81934\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-81934\nhttps://github.com/redis/redis/commit/6d088c335d5c3ec49a6c28486140b498e70b7834\nhttps://github.com/v12-security/pocs/tree/main/redis/server_ssl\nhttps://raw.githubusercontent.com/redis/redis/8.10/00-RELEASENOTES\nhttps://raw.githubusercontent.com/redis/redis/8.2/00-RELEASENOTES\nhttps://raw.githubusercontent.com/redis/redis/8.4/00-RELEASENOTES\nhttps://raw.githubusercontent.com/redis/redis/8.6/00-RELEASENOTES\nhttps://raw.githubusercontent.com/redis/redis/8.8/00-RELEASENOTES"], "statement": "This is an Important flaw in Redis, enabling remote, unauthenticated attackers to achieve arbitrary code execution. The vulnerability specifically impacts Redis instances configured with TLS support, which is not enabled by default in Red Hat Enterprise Linux, thereby limiting exposure in standard deployments.", "threat_severity": "Important"}

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