CVE-2019-19602

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.

• CWE-119

• https://bugzilla.kernel.org/show_bug.cgi?id=205663Issue Tracking, Third Party Advisory
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2Release Notes, Vendor Advisory
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=59c4bd853abcea95eccc167a7d7fd5f1a5f47b98Exploit, Vendor Advisory
• https://github.com/golang/go/issues/35777#issuecomment-561935388Issue Tracking, Third Party Advisory
• https://github.com/torvalds/linux/commit/59c4bd853abcea95eccc167a7d7fd5f1a5f47b98Exploit, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20200103-0001/Third Party Advisory
• https://usn.ubuntu.com/4284-1/Third Party Advisory
• https://bugzilla.kernel.org/show_bug.cgi?id=205663Issue Tracking, Third Party Advisory
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2Release Notes, Vendor Advisory
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=59c4bd853abcea95eccc167a7d7fd5f1a5f47b98Exploit, Vendor Advisory
• https://github.com/golang/go/issues/35777#issuecomment-561935388Issue Tracking, Third Party Advisory
• https://github.com/torvalds/linux/commit/59c4bd853abcea95eccc167a7d7fd5f1a5f47b98Exploit, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20200103-0001/Third Party Advisory
• https://usn.ubuntu.com/4284-1/Third Party Advisory

Published

Dec 5, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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