CVE-2023-52893
Published: August 22, 2024Last modified: August 22, 2024
Description
In the Linux kernel, the following vulnerability has been resolved: gsmi: fix null-deref in gsmi_get_variable We can get EFI variables without fetching the attribute, so we must allow for that in gsmi. commit 859748255b43 ("efi: pstore: Omit efivars caching EFI varstore access layer") added a new get_variable call with attr=NULL, which triggers panic in gsmi.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Not affected (6.1.33-r0) |
| Stream | linux-lts | Fixed (6.6.58-r0) |
References
- https://git.kernel.org/stable/c/32313c11bdc8a02c577abaf865be3664ab30410a
- https://git.kernel.org/stable/c/6646d769fdb0ce4318ef9afd127f8526d1ca8393
- https://git.kernel.org/stable/c/a769b05eeed7accc4019a1ed9799dd72067f1ce8
- https://git.kernel.org/stable/c/ae2a9dcc8caa60b1e14671294e5ec902ea5d1dfd
- https://git.kernel.org/stable/c/eb0421d90f916dffe96b4c049ddf01c0c50620d2
- https://git.kernel.org/stable/c/ee5763ef829bd923033510de6d1df7c73f085e4b
- https://git.kernel.org/stable/c/ffef77794fb5f1245c3249b86342bad2299accb5