CVE-2022-50098
Description
A flaw was found in the Linux kernel's qla2xxx driver. During storage input/output (I/O) timeout error handling, the driver fails to properly manage SCSI Request Block (SRB) structures, resulting in access to stale memory. A local user can exploit this condition during storage timeouts to trigger a kernel crash, leading to a Denial of Service (DoS).
Statement
This vulnerability is rated as Moderate severity rather than Important because exploitation requires local access, specific QLogic Fibre Channel storage hardware, and the occurrence of I/O timeout race conditions, resulting solely in a denial of service without compromising confidentiality or integrity. Systems without QLogic host bus adapters or environments that do not load the qla2xxx driver are unaffected by this issue. In typical enterprise deployments, triggering this fault requires an unprivileged local user to manipulate storage requests while the underlying SAN or Fibre Channel interface experiences severe I/O degradation.
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 | 4.7 | 5.5 | 8.8 |
| Attack Vector | Local | Local | Adjacent Network |
| Attack Complexity | High | Low | Low |
| Privileges Required | Low | Low | None |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | None | None | High |
| Integrity Impact | None | None | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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