CVE-2026-64047
A flaw in the Linux kernel's network transport layer security (TLS) implementation allows for an off-by-one error when handling specific message rings. This error occurs when the system attempts to link different parts of a data ring together.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Users running affected versions of the Linux kernel that utilize the net: tls component.
Real-world impact
An attacker could potentially exploit this memory error to cause system instability or gain unauthorized access to sensitive information by manipulating how data is stored in memory.
Why this severity
The critical score reflects that the vulnerability is remotely exploitable without requiring user interaction or special privileges, and it can impact the confidentiality, integrity, and availability of the system.
What to do about it
- 01Update the Linux kernel to the version containing the fix for the net: tls off-by-one error.
NVD-referenced vendor advisory
Timeline
- Jul 19, 2026 · 14d agoPublishedDisclosed and added to the National Vulnerability Database.
- Jul 20, 2026 · 13d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.
- Jul 30, 2026 · 3d agoAdvisory updatedThe NVD record was last revised.
How it’s attacked
References & advisories
- git.kernel.org/stable/c/131ef12057d92b77b6…
- git.kernel.org/stable/c/285943c6e7ca309bbe…
- git.kernel.org/stable/c/2fb0dc7e0099686c4e…
- git.kernel.org/stable/c/47110c3a9ac247b688…
- git.kernel.org/stable/c/66339b71f105e6f83e…
- git.kernel.org/stable/c/73963a375885d5ccb7…
- git.kernel.org/stable/c/84158c2997159df4a0…
- git.kernel.org/stable/c/eca989eab4b2599dcb…