CVE-2024-57892

Updated: 2025-02-14 01:07:49.965596

Description:

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix slab-use-after-free due to dangling pointer dqi_priv When mounting ocfs2 and then remounting it as read-only, a slab-use-after-free occurs after the user uses a syscall to quota_getnextquota. Specifically, sb_dqinfo(sb, type)->dqi_priv is the dangling pointer. During the remounting process, the pointer dqi_priv is freed but is never set as null leaving it to be accessed. Additionally, the read-only option for remounting sets the DQUOT_SUSPENDED flag instead of setting the DQUOT_USAGE_ENABLED flags. Moreover, later in the process of getting the next quota, the function ocfs2_get_next_id is called and only checks the quota usage flags and not the quota suspended flags. To fix this, I set dqi_priv to null when it is freed after remounting with read-only and put a check for DQUOT_SUSPENDED in ocfs2_get_next_id. [akpm@linux-foundation.org: coding-style cleanups]


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x 0
CVSS Version 3.x HIGH 7.8

Status

OS name Project name Version Score Severity Status Errata Last updated

Statement

AlmaLinux 9.2 ESU kernel 5.14.0 7.8 HIGH Needs Triage 2025-01-26 00:02:12
AlmaLinux 9.2 FIPS kernel 5.14.0 7.8 HIGH Not Vulnerable 2025-02-14 02:42:46
CentOS 8.4 ELS kernel 4.18.0 7.8 HIGH Needs Triage 2025-01-26 00:02:14
CentOS 8.5 ELS kernel 4.18.0 7.8 HIGH Needs Triage 2025-01-26 00:02:13
CentOS Stream 8 ELS kernel 4.18.0 7.8 HIGH Not Vulnerable 2025-02-19 06:49:46
Ubuntu 16.04 ELS linux-hwe 4.15.0 7.8 HIGH Released CLSA-2025:1738696174 2025-02-05 02:14:47
Ubuntu 18.04 ELS linux 4.15.0 7.8 HIGH Released CLSA-2025:1738852812 2025-02-07 06:35:21