Executive Summary

Informations
Name CVE-2024-50191 First vendor Publication 2024-11-08
Vendor Cve Last vendor Modification 2024-11-08

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
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Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50191

Sources (Detail)

https://git.kernel.org/stable/c/4061e07f040a091f694f461b86a26cf95ae66439
https://git.kernel.org/stable/c/58c0648e4c773f5b54f0cb63bc8c7c6bf52719a9
https://git.kernel.org/stable/c/d3476f3dad4ad68ae5f6b008ea6591d1520da5d8
https://git.kernel.org/stable/c/ee77c388469116565e009eaa704a60bc78489e09
https://git.kernel.org/stable/c/fbb177bc1d6487cd3e9b50ae0be2781b7297980d
Source Url

Alert History

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Date Informations
2024-11-09 03:01:55
  • Multiple Updates
2024-11-09 03:01:13
  • Multiple Updates
2024-11-09 00:27:29
  • Multiple Updates
2024-11-08 13:27:35
  • First insertion