CVE-2024-53147
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Last Modified:
Description
The CVE Program describes this issue as:
In the Linux kernel, the following vulnerability has been resolved: exfat: fix out-of-bounds access of directory entries In the case of the directory size is greater than or equal to the cluster size, if start_clu becomes an EOF cluster(an invalid cluster) due to file system corruption, then the directory entry where ei->hint_femp.eidx hint is outside the directory, resulting in an out-of-bounds access, which may cause further file system corruption. This commit adds a check for start_clu, if it is an invalid cluster, the file or directory will be treated as empty.
Statement
Actual only for latest Red Hat Enterprise Linux 9, because before configuration parameter for exFAT file system (CONFIG_EXFAT_FS) was disabled. The bug could happen if file system already corrupted and leads to potentially more corruptions.
Mitigation
To mitigate this issue, prevent module exfat from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.
Additional information
- Bugzilla 2333985: kernel: exfat: fix out-of-bounds access of directory entries
- CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
Common Vulnerability Scoring System (CVSS) Score Details
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.
| Red Hat | NVD | |
|---|---|---|
CVSS v3 Base Score | 4.7 | N/A |
Attack Vector | Local | N/A |
Attack Complexity | High | N/A |
Privileges Required | Low | N/A |
User Interaction | None | N/A |
Scope | Unchanged | N/A |
Confidentiality Impact | None | N/A |
Integrity Impact | None | N/A |
Availability Impact | High | N/A |
CVSS v3 Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Frequently Asked Questions
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