CVE-2022-49122
Description
A vulnerability was found in the Linux kernel's dm-ioctl interface in the lookup_ioctl() function, which accepts a user-provided cmd value that is used to index the _ioctls array directly. This issue could lead to an out-of-bounds access if the CPU speculatively executes the array access before cmd is confirmed as valid, allowing an attacker to exploit a Spectre v1 gadget attack.
Statement
Red Hat has rated this vulnerability with a security impact of Moderate. All Red Hat products are being evaluated for impact and Red Hat will work with the Linux community to analyze and correct any issues found.
Successful exploitation of this flaw requires the attacker to have advanced knowledge of the software versions used on the system.
For additional information about this flaw, including possible mitigations, please refer to: https://access.redhat.com/solutions/3545361
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).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.3 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | None | N/A |
| Integrity Impact | Low | None | N/A |
| Availability Impact | Low | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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