UBUNTU-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.
02 / AFFECTED SOFTWARE
Affected packages
32 explicit affected versions
71 explicit affected versions
46 explicit affected versions
13 explicit affected versions
1 explicit affected versions
33 explicit affected versions
15 explicit affected versions
15 explicit affected versions
23 explicit affected versions
37 explicit affected versions
35 explicit affected versions
69 explicit affected versions
23 explicit affected versions
16 explicit affected versions
51 explicit affected versions
16 explicit affected versions
26 explicit affected versions
7 explicit affected versions
77 explicit affected versions
13 explicit affected versions
1 explicit affected versions
1 explicit affected versions
34 explicit affected versions
6 explicit affected versions
58 explicit affected versions
39 explicit affected versions
30 explicit affected versions
26 explicit affected versions
12 explicit affected versions
36 explicit affected versions
11 explicit affected versions
38 explicit affected versions
99 explicit affected versions
59 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://grsecurity.net/teardown_of_a_failed_linux_lts_spectre_fix.php
- https://ubuntu.com/security/CVE-2019-15902
- https://ubuntu.com/security/notices/USN-4157-1
- https://ubuntu.com/security/notices/USN-4157-2
- https://ubuntu.com/security/notices/USN-4162-1
- https://ubuntu.com/security/notices/USN-4162-2
- https://ubuntu.com/security/notices/USN-4163-1
- https://ubuntu.com/security/notices/USN-4163-2
- https://www.cve.org/CVERecord?id=CVE-2019-15902