CVE-2026-64000
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk40th percentile - higher than 40% of all known CVEs
Summary
In the Linux kernel, a vulnerability in the HSR (High-availability Seamless Redundancy) module allows out-of-bounds (OOB) access during supervision frame handling. The issue is due to insufficient length checking of the TLV header before use.
Risk Assessment
An attacker can send a specially crafted truncated network frame, potentially leading to out-of-bounds read or write, which may cause system crash or privilege escalation.
Recommendation
Immediately update the Linux kernel to a version containing the fix (commit adding sizeof(struct hsr_sup_tlv) to pskb_may_pull() calls).
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: net: hsr: fix potential OOB access in supervision frame handling Ensure the entire TLV header is linearized before access by adding sizeof(struct hsr_sup_tlv) to the pskb_may_pull() calls. Without this, a truncated frame could cause an out-of-bounds access.