Vulnerabilities
Linux Kernel TLS Protocol Out-of-Bounds Read Vulnerability (CVE-2026-64046)
A high-privileged local attacker can exploit an out-of-bounds read vulnerability in the Linux kernel TLS protocol implementation to disclose sensitive memory. Tracked as CVE-2026-64046 with a CVSS score of 6.7, the flaw stems from inadequate input validation during message splicing. System administrators must apply the official kernel patch to remediate the issue.
What Happened
A security flaw has been identified in the Linux kernel's TLS protocol implementation, specifically within its message splicing logic. Designated as CVE-2026-64046 and assigned a CVSS score of 6.7, the vulnerability arises from a lack of proper validation on user-supplied data. This failure permits an out-of-bounds read, allowing execution past the boundary of an allocated array.
Impact and Exploitation
Successful exploitation requires a local attacker to already possess high-privileged code execution capabilities on the target host. While the direct impact is limited to sensitive information disclosure, this memory leakage can be chained with other security flaws to facilitate arbitrary code execution within the kernel context, increasing overall system risk.
What to Do
SecOps and sysadmins should review affected Linux kernel installations and apply the official vendor patch immediately. The corrective commit has been merged into the upstream Linux repository to properly validate user-supplied data during message splicing operations.
- Identify systems running vulnerable Linux kernel versions.
- Apply the upstream kernel patch addressing commit ff26a0e8377dec07e4a7230db7675bed1b9a6d03.
- Audit local user privileges to ensure least-privilege enforcement, limiting the risk of high-privileged code execution vectors.
Related vulnerabilities
CVE-2026-70063: Local Windows Kernel Information Disclosure Vulnerability
Microsoft has identified CVE-2026-70063, an out‑of‑bounds read in the Windows kernel that permits a local, authorized attacker to read sensitive memory. The flaw is fixed in the latest cumulative update for Windows 10, Windows 11, and Windows Server 2022. Defenders should verify that the update is installed and monitor for any anomalous local privilege activity.
Read briefing
CVE-2026-108466: Windows Kernel Out-of-Bounds Read Causes Network Denial of Service
An out-of-bounds read in the Windows kernel (CVE-2026-108466) can be exploited by an unauthorized network attacker to trigger a denial of service. Microsoft has released a patch; administrators should update affected systems and monitor for abnormal traffic.
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CVE-2026-108462: Windows Kernel Information Disclosure Vulnerability
Microsoft has identified a Windows kernel information disclosure flaw (CVE‑2026‑108462) that permits local attackers with elevated privileges to read sensitive system data. The issue is fixed in the latest security update; administrators should apply the patch immediately and verify that kernel memory is protected.
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Windows Overlay Filter RCE Vulnerability (CVE‑2026‑69959) – Immediate Patch Required
Microsoft has disclosed a high‑severity out‑of‑bounds read in the Windows Overlay Filter that allows an authorized user to execute arbitrary code locally. The flaw is fixed in the latest security update; administrators must apply the patch and verify system integrity.
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