CVE-2023-53845
Description
An infinite loop vulnerability was found in the NILFS2 filesystem in the Linux kernel. When mounting a corrupted disk image where a virtual block address is invalid, nilfs_bmap_lookup_at_level() returns an error code that is misinterpreted by nilfs_mdt_get_block(). This causes an infinite loop attempting to read and create metadata blocks. When this affects the inode file (ifile), the i_rwsem semaphore remains held, causing task hangs during mount operations.
Statement
This is an infinite loop vulnerability in NILFS2 filesystem that can be triggered by mounting a corrupted filesystem image. The impact is limited to systems using NILFS2 and can be exploited by providing a maliciously crafted filesystem image.
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 | 5.5 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | 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:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Availability,Integrity
Technical Impact: Unexpected State; DoS: Crash, Exit, or Restart
An unexpected return value could place the system in a state that could lead to a crash or other unintended behaviors.
Frequently Asked Questions
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