Organizations Warned of 3 Exploited Linux Kernel Vulnerabilities
Three Linux kernel vulnerabilities have been identified and added to CISA's Known Exploited Vulnerabilities catalog. These flaws allow local attackers to cause denial-of-service conditions, memory disclosure, or unauthorized memory modification. The vulnerabilities involve issues in the TLS receive path, AF_ALG socket handling, and bridge Netfilter ebtables SNAT target. Federal agencies are urged to patch these vulnerabilities promptly.
AI Analysis
Technical Summary
CISA has added three Linux kernel vulnerabilities to its KEV catalog: CVE-2025-39682 (CVSS 9.8) is a critical flaw in the TLS receive path where improper handling of zero-length records can cause denial-of-service or memory disclosure. CVE-2025-39964 (CVSS 7.8) is a race condition in AF_ALG sockets causing data interleaving and potential system crashes or corrupted cryptographic operations leading to DoS. CVE-2026-53266 (CVSS 8.8) is an out-of-bounds write in the bridge Netfilter ebtables SNAT target where crafted ARP packets cause memory corruption and unauthorized memory modification. No active exploitation details have been shared, but federal agencies are advised to patch within three days.
Potential Impact
These vulnerabilities can be exploited by local attackers to cause denial-of-service conditions, disclose sensitive memory contents, or modify memory in unauthorized ways. This can lead to system instability, crashes, corrupted cryptographic operations, and potential security breaches due to memory corruption.
Mitigation Recommendations
Federal agencies and affected organizations are urged to apply patches for these vulnerabilities within three days as per CISA guidance. Since no specific patch links are provided here, consult the official vendor advisories or CISA KEV catalog for the latest patches and remediation instructions. Immediate patching is the recommended mitigation.
Organizations Warned of 3 Exploited Linux Kernel Vulnerabilities
Description
Three Linux kernel vulnerabilities have been identified and added to CISA's Known Exploited Vulnerabilities catalog. These flaws allow local attackers to cause denial-of-service conditions, memory disclosure, or unauthorized memory modification. The vulnerabilities involve issues in the TLS receive path, AF_ALG socket handling, and bridge Netfilter ebtables SNAT target. Federal agencies are urged to patch these vulnerabilities promptly.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CISA has added three Linux kernel vulnerabilities to its KEV catalog: CVE-2025-39682 (CVSS 9.8) is a critical flaw in the TLS receive path where improper handling of zero-length records can cause denial-of-service or memory disclosure. CVE-2025-39964 (CVSS 7.8) is a race condition in AF_ALG sockets causing data interleaving and potential system crashes or corrupted cryptographic operations leading to DoS. CVE-2026-53266 (CVSS 8.8) is an out-of-bounds write in the bridge Netfilter ebtables SNAT target where crafted ARP packets cause memory corruption and unauthorized memory modification. No active exploitation details have been shared, but federal agencies are advised to patch within three days.
Potential Impact
These vulnerabilities can be exploited by local attackers to cause denial-of-service conditions, disclose sensitive memory contents, or modify memory in unauthorized ways. This can lead to system instability, crashes, corrupted cryptographic operations, and potential security breaches due to memory corruption.
Mitigation Recommendations
Federal agencies and affected organizations are urged to apply patches for these vulnerabilities within three days as per CISA guidance. Since no specific patch links are provided here, consult the official vendor advisories or CISA KEV catalog for the latest patches and remediation instructions. Immediate patching is the recommended mitigation.
Technical Details
- Classification
- {"confidence":0.8,"severitySource":"default","classifier":"rss-v2"}
- Article Source
- {"url":"https://www.securityweek.com/organizations-warned-of-3-exploited-linux-kernel-vulnerabilities/","fetched":true,"fetchedAt":"2026-09-21T09:31:40.003Z","wordCount":1000}
Threat ID: 6ab0f97c55bf5e2cf5ac028a
Added to database: 09/21/2026, 09:31:40 UTC
Last enriched: 09/21/2026, 09:31:47 UTC
Last updated: 09/21/2026, 14:46:13 UTC
Views: 65
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