Updated: 2023-11-04 20:52:00.331412
Description:
The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in the upstream kernel in commit 9b00f1b78809 ("bpf: Fix truncation handling for mod32 dst reg wrt zero") and in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | MEDIUM | 4.6 |
| CVSS Version 3.x | HIGH | 7.8 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated |
|---|---|---|---|---|---|---|---|
| CentOS 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Not Vulnerable | 2021-12-09 07:57:26 | |
| CentOS 7 ELS | kernel | 3.10.0 | 7.8 | HIGH | Needs Triage | 2023-09-18 17:05:32 | |
| CentOS 8.4 ELS | kernel | 4.18.0 | 7.8 | HIGH | Ignored | 2022-02-15 12:04:35 | |
| CentOS 8.5 ELS | kernel | 4.18.0 | 7.8 | HIGH | Ignored | 2022-02-21 05:39:36 | |
| CloudLinux 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Not Vulnerable | 2022-03-30 18:51:02 | |
| Oracle Linux 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Not Vulnerable | 2022-03-30 18:51:02 | |
| Ubuntu 16.04 ELS | linux | 4.4.0 | 7.8 | HIGH | Not Vulnerable | 2022-02-17 08:55:51 | |
| Ubuntu 16.04 ELS | linux-hwe | 4.15.0 | 7.8 | HIGH | Already Fixed | 2022-09-28 03:36:16 | |
| Ubuntu 18.04 ELS | linux | 4.15.0 | 7.8 | HIGH | Not Vulnerable | 2023-08-28 21:18:51 |