CVE-2024-50193
Published: November 12, 2024Last modified: November 12, 2024
Description
In the Linux kernel, the following vulnerability has been resolved: x86/entry_32: Clear CPU buffers after register restore in NMI return CPU buffers are currently cleared after call to exc_nmi, but before register state is restored. This may be okay for MDS mitigation but not for RDFS. Because RDFS mitigation requires CPU buffers to be cleared when registers don't have any sensitive data. Move CLEAR_CPU_BUFFERS after RESTORE_ALL_NMI.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.1 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Not affected (6.1.33-r0) |
| Stream | linux-lts | Not affected (6.1.33-r0) |
References
- https://git.kernel.org/stable/c/227358e89703c344008119be7e8ffa3fdb5b92de
- https://git.kernel.org/stable/c/43778de19d2ef129636815274644b9c16e78c66b
- https://git.kernel.org/stable/c/48a2440d0f20c826b884e04377ccc1e4696c84e9
- https://git.kernel.org/stable/c/64adf22c4bc73ede920baca5defefb70f190cdbc
- https://git.kernel.org/stable/c/6f44a5fc15b5cece0785bc07453db77d99b0a6de
- https://git.kernel.org/stable/c/b6400eb0b347821efc57760221f8fb6d63b9548a