CVE-2019-15902

A backporting error was discovered in the Linux stable/longterm kernel 4.4.x through 4.4.190, 4.9.x through 4.9.190, 4.14.x through 4.14.141, 4.19.x through 4.19.69, and 5.2.x through 5.2.11. Misuse of the upstream "x86/ptrace: Fix possible spectre-v1 in ptrace_get_debugreg()" commit reintroduced the Spectre vulnerability that it aimed to eliminate. This occurred because the backport process depends on cherry picking specific commits, and because two (correctly ordered) code lines were swapped.

• CWE-200

• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.htmlThird Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.htmlThird Party Advisory
• https://grsecurity.net/teardown_of_a_failed_linux_lts_spectre_fix.phpExploit, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2019/10/msg00000.htmlThird Party Advisory
• https://seclists.org/bugtraq/2019/Sep/41Mailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20191004-0001/Third Party Advisory
• https://usn.ubuntu.com/4157-1/
• https://usn.ubuntu.com/4157-2/
• https://usn.ubuntu.com/4162-1/
• https://usn.ubuntu.com/4162-2/
• https://usn.ubuntu.com/4163-1/
• https://usn.ubuntu.com/4163-2/
• https://www.debian.org/security/2019/dsa-4531Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.htmlThird Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.htmlThird Party Advisory
• https://grsecurity.net/teardown_of_a_failed_linux_lts_spectre_fix.phpExploit, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2019/10/msg00000.htmlThird Party Advisory
• https://seclists.org/bugtraq/2019/Sep/41Mailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20191004-0001/Third Party Advisory
• https://usn.ubuntu.com/4157-1/
• https://usn.ubuntu.com/4157-2/
• https://usn.ubuntu.com/4162-1/
• https://usn.ubuntu.com/4162-2/
• https://usn.ubuntu.com/4163-1/
• https://usn.ubuntu.com/4163-2/
• https://www.debian.org/security/2019/dsa-4531Third Party Advisory

Published

Sep 4, 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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