CVE-2023-40791
Description
An unreleased memory page flaw (unpinned) was found in extract_user_to_sg in the lib/scatterlist.c function of the Linux kernel. This flaw allows a local user, or potentially remote user, to crash the system.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.3 | 6.3 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | High | High | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | High | High | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
NVD: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Red Hat CVSS v3 Score Explanation
The AV:L, because no known network attack scenario (the fail happens when writing big data like 38353 bytes to the socket "in the error path" during some race condition, and it is possible to reproduce it only locally). The PR:L, because only user with access to network socket when network file system being used can trigger it. The AC:H, because happens kind of race condition (unpin memory twice from different paths "in the error path").
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
