Updated: 2025-08-20 00:30:11.857215
Description:
An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and thus privilege escalation). This depends on a race condition through which userspace can replace an instruction before the #VC handler reads it.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | 0.0 | |
| CVSS Version 3.x | HIGH | 7.0 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| AlmaLinux 9.2 ESU | kernel | 5.14.0 | 7.0 | HIGH | Released | CLSA-2025:1743193221 | 2024-09-02 17:38:29 | |
| CentOS 6 ELS | kernel | 2.6.32 | 7.0 | HIGH | Not Vulnerable | 2023-12-26 13:10:13 | ||
| CentOS 7 ELS | kernel | 3.10.0 | 7.0 | HIGH | Not Vulnerable | 2024-07-02 11:21:32 | ||
| CentOS 8.4 ELS | kernel | 4.18.0 | 7.0 | HIGH | Released | CLSA-2023:1701963303 | 2023-12-07 13:10:24 | |
| CentOS 8.5 ELS | kernel | 4.18.0 | 7.0 | HIGH | Released | CLSA-2023:1701962635 | 2023-12-07 13:10:25 | |
| CloudLinux 6 ELS | kernel | 2.6.32 | 7.0 | HIGH | Not Vulnerable | 2024-05-08 10:18:58 | ||
| Oracle Linux 6 ELS | kernel | 2.6.32 | 7.0 | HIGH | Not Vulnerable | 2023-12-26 13:10:11 | ||
| Ubuntu 16.04 ELS | linux-hwe | 4.15.0 | 7.0 | HIGH | Not Vulnerable | 2023-11-27 08:39:03 | ||
| Ubuntu 16.04 ELS | linux | 4.4.0 | 7.0 | HIGH | Not Vulnerable | 2023-11-27 08:39:03 | ||
| Ubuntu 18.04 ELS | linux | 4.15.0 | 7.0 | HIGH | Not Vulnerable | 2023-11-27 08:39:03 |