CVE-2023-54071
Description
A flaw was identified in the Linux kernel’s rtw88 Wi-Fi driver (drivers/net/wireless/realtek/rtw88) where the ieee80211_ops::sta_rc_update callback was invoked within a Read-Copy-Update (RCU) read-side critical section without proper atomicity or deferral. The ieee80211_chan_bw_change() function holds an RCU read lock while calling into drv_sta_rc_update(), and under these conditions, the driver could perform work that may trigger a voluntary context switch inside the RCU protection region. This improper synchronization can lead to unpredictable kernel behavior, including WARN messages, instability in wireless operations, and potential denial-of-service scenarios.
Mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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 | 4.7 | N/A | 8.8 |
| Attack Vector | Local | N/A | Adjacent Network |
| Attack Complexity | High | N/A | Low |
| Privileges Required | Low | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | High |
| Integrity Impact | None | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/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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