CVE-2019-7308
Public on 2019-02-01
Modified on 2021-07-15
Description
A bypass was found for the Spectre v1 hardening in the eBPF engine of the Linux kernel. The code in the kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize, leading to side-channel attacks.
Severity
Important
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | kernel | 2019-05-02 | ALAS-2019-1201 | Fixed |
| Amazon Linux 2 - Core | kernel | 2019-05-02 | ALAS2-2019-1201 | Fixed |
| Amazon Linux 2 - Core | kernel | 2021-04-20 | ALAS2-2021-1627 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 5.6 | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N |
| NVD | CVSSv2 | 4.7 | AV:L/AC:M/Au:N/C:C/I:N/A:N |
| NVD | CVSSv3 | 5.6 | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N |