CVE-2019-15902

MEDIUM5.6

A backporting error was discovered in the Linux stable/longterm kernel 4

Published Sep 4, 2019

Modified 1 years ago

Details

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.

References

ADVISORY

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html

ADVISORY

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html

WEB

https://grsecurity.net/teardown_of_a_failed_linux_lts_spectre_fix.php

WEB

https://lists.debian.org/debian-lts-announce/2019/10/msg00000.html

WEB

https://seclists.org/bugtraq/2019/Sep/41

WEB