CVE-2024-50191

CVE Details

Release Date:	2024-11-08
Impact:	Moderate	What is this?

Description

In the Linux kernel, the following vulnerability has been resolved:\next4: don't set SB_RDONLY after filesystem errors\nWhen the filesystem is mounted with errors=remount-ro, we were setting\nSB_RDONLY flag to stop all filesystem modifications. We knew this misses\nproper locking (sb->s_umount) and does not go through proper filesystem\nremount procedure but it has been the way this worked since early ext2\ndays and it was good enough for catastrophic situation damage\nmitigation. Recently, syzbot has found a way (see link) to trigger\nwarnings in filesystem freezing because the code got confused by\nSB_RDONLY changing under its hands. Since these days we set\nEXT4_FLAGS_SHUTDOWN on the superblock which is enough to stop all\nfilesystem modifications, modifying SB_RDONLY shouldn't be needed. So\nstop doing that.

See more information about CVE-2024-50191 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	5.5
Vector String:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Version:	3.1
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	High

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