CVE-2019-19602: Canonical Ubuntu Linux

Medium severity, CVSS 6.1. EPSS: 0.6% chance of exploitation in the next 30 days.

fpregs_state_valid in arch/x86/include/asm/fpu/internal.h in the Linux kernel before 5.4.2, when GCC 9 is used, allows context-dependent attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact because of incorrect fpu_fpregs_owner_ctx caching, as demonstrated by mishandling of signal-based non-cooperative preemption in Go 1.14 prereleases on amd64, aka CID-59c4bd853abc.

Affected products

• Canonical Ubuntu Linux: version 18.04 only; version 19.10 only
• Linux Linux Kernel: before 5.4.2 (fixed in 5.4.2)

Published 2019-12-05. Last modified 2026-06-17.