Linux Kernel Vulnerability in PPP Process Management

CVE-2026-98158

What is CVE-2026-98158?

A vulnerability in the Linux kernel's PPP (Point-to-Point Protocol) processing allows remote attackers to cause a denial of service through an improperly managed headroom in the data frame. The issue arises when an erroneous PPP frame is processed, leading to improper handling of allocated buffer space, which can trigger a kernel panic. This vulnerability exposes systems to crashes when specific faulty frames are sent consecutively, ultimately compromising network stability. The recommended solution involves dropping the problematic frame rather than resetting the headroom, ensuring that subsequent frames utilize properly allocated buffers.

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