CVE-2026-101302: Remote DoS via receive-side kernel TLS
TLS 1.3 embeds the actual record type as the last non-zero byte of the decrypted payload, optionally followed by zero padding. The code which searches for the inner record type had an off-by-one bug which could be triggered by an invalid frame, leading to an underflow followed by an unconditional NULL pointer dereference, causing a kernel panic.
A remote TLS 1.3 peer can send a specially crafted record to trigger a kernel panic, resulting in a Denial of Service (DoS).
Affected Software
Event History
Frequently Asked Questions
What conditions make a system susceptible?
The affected path is receive-side kernel TLS when processing TLS 1.3 records. A remote TLS 1.3 peer must be able to send a specially crafted record to the system.
What is the practical impact of successful exploitation?
The malformed record can trigger an underflow and unconditional NULL pointer dereference in the kernel, causing a kernel panic. This results in denial of service.