CVE-2024-26869: f2fs: fix to truncate meta inode pages forcely
First published: Wed Apr 17 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to truncate meta inode pages forcely Below race case can cause data corruption: Thread A GC thread - gc_data_segment - ra_data_block - locked meta_inode page - f2fs_inplace_write_data - invalidate_mapping_pages : fail to invalidate meta_inode page due to lock failure or dirty|writeback status - f2fs_submit_page_bio : write last dirty data to old blkaddr - move_data_block - load old data from meta_inode page - f2fs_submit_page_write : write old data to new blkaddr Because invalidate_mapping_pages() will skip invalidating page which has unclear status including locked, dirty, writeback and so on, so we need to use truncate_inode_pages_range() instead of invalidate_mapping_pages() to make sure meta_inode page will be dropped.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | <=5.10.223-1<=5.10.234-1<=6.1.129-1<=6.1.135-1 | 6.12.22-1 6.12.25-1 |
| Linux Kernel | >=4.19<6.6.23 | |
| Linux Kernel | >=6.7<6.7.11 | |
| Linux Kernel | >=6.8<6.8.2 |
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Reference Links
- https://git.kernel.org/stable/c/04226d8e3c4028dc451e9d8777356ec0f7919253
- https://git.kernel.org/stable/c/77bfdb89cc222fc7bfe198eda77bdc427d5ac189
- https://git.kernel.org/stable/c/9f0c4a46be1fe9b97dbe66d49204c1371e3ece65
- https://git.kernel.org/stable/c/c92f2927df860a60ba815d3ee610a944b92a8694
- https://launchpad.net/bugs/cve/CVE-2024-26869
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26869
- https://nvd.nist.gov/vuln/detail/CVE-2024-26869
- https://security-tracker.debian.org/tracker/CVE-2024-26869
- https://ubuntu.com/security/CVE-2024-26869
- https://git.kernel.org/linus/9f0c4a46be1fe9b97dbe66d49204c1371e3ece65
Frequently Asked Questions
What is the severity of CVE-2024-26869?
CVE-2024-26869 is classified as a moderate severity vulnerability in the Linux kernel.
How do I fix CVE-2024-26869?
To mitigate CVE-2024-26869, update your Linux kernel to version 6.12.11-1, 6.12.12-1, or a later version.
What systems are affected by CVE-2024-26869?
CVE-2024-26869 affects users running specific versions of the Linux kernel, including 5.10.223-1, 5.10.226-1, 6.1.119-1, and 6.1.123-1.
What type of vulnerability is CVE-2024-26869?
CVE-2024-26869 is a race condition vulnerability that can lead to data corruption in the f2fs filesystem.
Is CVE-2024-26869 commonly exploitable?
While CVE-2024-26869 can cause data corruption, its exploitation requires specific conditions within the Linux kernel's f2fs component.
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