A backporting error was discovered in the Linux stable/longterm kernel...
Vulnerability Description
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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://grsecurity.net/teardown_of_a_failed_linux_lts_spectre_fix.php
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
- https://seclists.org/bugtraq/2019/Sep/41
- https://www.debian.org/security/2019/dsa-4531
- https://lists.debian.org/debian-lts-announce/2019/10/msg00000.html
- https://security.netapp.com/advisory/ntap-20191004-0001/
- https://usn.ubuntu.com/4157-1/
- https://usn.ubuntu.com/4162-1/
- https://usn.ubuntu.com/4157-2/
- https://usn.ubuntu.com/4163-1/
- https://usn.ubuntu.com/4163-2/
- https://usn.ubuntu.com/4162-2/
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Weaknesses (CWE)
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MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.