CVE - CVE-2024-50191

CVE-ID
CVE-2024-50191	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: don't set SB_RDONLY after filesystem errors When the filesystem is mounted with errors=remount-ro, we were setting SB_RDONLY flag to stop all filesystem modifications. We knew this misses proper locking (sb->s_umount) and does not go through proper filesystem remount procedure but it has been the way this worked since early ext2 days and it was good enough for catastrophic situation damage mitigation. Recently, syzbot has found a way (see link) to trigger warnings in filesystem freezing because the code got confused by SB_RDONLY changing under its hands. Since these days we set EXT4_FLAGS_SHUTDOWN on the superblock which is enough to stop all filesystem modifications, modifying SB_RDONLY shouldn't be needed. So stop doing that.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/4061e07f040a091f694f461b86a26cf95ae66439 URL:https://git.kernel.org/stable/c/4061e07f040a091f694f461b86a26cf95ae66439 MISC:https://git.kernel.org/stable/c/58c0648e4c773f5b54f0cb63bc8c7c6bf52719a9 URL:https://git.kernel.org/stable/c/58c0648e4c773f5b54f0cb63bc8c7c6bf52719a9 MISC:https://git.kernel.org/stable/c/d3476f3dad4ad68ae5f6b008ea6591d1520da5d8 URL:https://git.kernel.org/stable/c/d3476f3dad4ad68ae5f6b008ea6591d1520da5d8 MISC:https://git.kernel.org/stable/c/ee77c388469116565e009eaa704a60bc78489e09 URL:https://git.kernel.org/stable/c/ee77c388469116565e009eaa704a60bc78489e09 MISC:https://git.kernel.org/stable/c/fbb177bc1d6487cd3e9b50ae0be2781b7297980d URL:https://git.kernel.org/stable/c/fbb177bc1d6487cd3e9b50ae0be2781b7297980d
Assigning CNA
kernel.org
Date Record Created
20241021	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241021)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)