Updated: 2026-02-27 02:10:12.173416
Description:
kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can contain uninitialized data that might represent sensitive information previously operated on by the kernel.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | LOW | 2.1 |
| CVSS Version 3.x | MEDIUM | 5.5 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| CentOS 6 ELS | kernel | 2.6.32 | 5.5 | MEDIUM | Not Vulnerable | 2022-01-01 14:14:01 | Not affected: CVE-2021-31829 targets the eBPF verifier in kernel/bpf/verifier.c and applies only to ... | |
| CentOS 7 ELS | kernel | 3.10.0 | 5.5 | MEDIUM | Ignored | 2023-09-19 09:30:07 | Ignored due to low severity | |
| CentOS 8.4 ELS | kernel | 4.18.0 | 5.5 | MEDIUM | Released | CLSA-2022:1651145959 | 2022-04-28 16:00:01 | |
| CentOS 8.5 ELS | kernel | 4.18.0 | 5.5 | MEDIUM | Already Fixed | 2025-10-24 07:18:33 | ||
| CloudLinux 6 ELS | kernel | 2.6.32 | 5.5 | MEDIUM | Ignored | 2022-01-27 11:20:22 | Ignored due to low severity | |
| Oracle Linux 6 ELS | kernel | 2.6.32 | 5.5 | MEDIUM | Ignored | 2022-01-27 11:20:21 | Ignored due to low severity | |
| Ubuntu 16.04 ELS | linux-hwe | 4.15.0 | 5.5 | MEDIUM | Ignored | 2022-09-28 08:02:40 | Ignored due to low severity | |
| Ubuntu 16.04 ELS | linux | 4.4.0 | 5.5 | MEDIUM | Not Vulnerable | 2022-01-01 14:14:01 | Ignored due to low severity | |
| Ubuntu 18.04 ELS | linux | 4.15.0 | 5.5 | MEDIUM | Ignored | 2023-03-02 04:04:07 | Ignored due to low severity |