CVE-2023-54197
Description
A regression was found in the Linux kernel's Bluetooth btsdio driver. A previous commit (1e9ac114c442) intended to fix a use-after-free bug introduced a potential NULL pointer dereference problem. This commit reverts that change since the original issue was properly fixed by a separate commit (73f7b171b7c0) that addressed the race condition correctly.
Statement
This is a revert of a problematic fix that introduced a NULL pointer dereference. The underlying use-after-free issue was already resolved by a different, correct fix. Systems with Bluetooth SDIO devices could potentially experience a kernel crash from the NULL pointer dereference until this revert is applied.
Mitigation
To mitigate this issue, prevent the btsdio module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.
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 | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | High | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
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