CVE-2024-50230: nilfs2: fix kernel bug due to missing clearing of checked flag
First published: Sat Nov 09 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix kernel bug due to missing clearing of checked flag Syzbot reported that in directory operations after nilfs2 detects filesystem corruption and degrades to read-only, __block_write_begin_int(), which is called to prepare block writes, may fail the BUG_ON check for accesses exceeding the folio/page size, triggering a kernel bug. This was found to be because the "checked" flag of a page/folio was not cleared when it was discarded by nilfs2's own routine, which causes the sanity check of directory entries to be skipped when the directory page/folio is reloaded. So, fix that. This was necessary when the use of nilfs2's own page discard routine was applied to more than just metadata files.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=3.10<4.19.323 | |
| Linux Kernel | >=4.20<5.4.285 | |
| Linux Kernel | >=5.5<5.10.229 | |
| Linux Kernel | >=5.11<5.15.171 | |
| Linux Kernel | >=5.16<6.1.116 | |
| Linux Kernel | >=6.2<6.6.60 | |
| Linux Kernel | >=6.7<6.11.7 | |
| Linux Kernel | =6.12-rc1 | |
| Linux Kernel | =6.12-rc2 | |
| Linux Kernel | =6.12-rc3 | |
| Linux Kernel | =6.12-rc4 | |
| Linux Kernel | =6.12-rc5 | |
| debian/linux | <=5.10.223-1 | 5.10.234-1 6.1.129-1 6.1.133-1 6.12.22-1 |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/994b2fa13a6c9cf3feca93090a9c337d48e3d60d
- https://git.kernel.org/stable/c/64afad73e4623308d8943645e5631f2c7a2d7971
- https://git.kernel.org/stable/c/aa0cee46c5d3fd9a39575a4c8a4f65f25f095b89
- https://git.kernel.org/stable/c/f05dbebb8ee34882505d53d83af7d18f28a49248
- https://git.kernel.org/stable/c/cd0cdb51b15203fa27d4b714be83b7dfffa0b752
- https://git.kernel.org/stable/c/f2f1fa446676c21edb777e6d2bc4fa8f956fab68
- https://git.kernel.org/stable/c/56c6171932a7fb267ac6cb4ff8759b93ee1d0e2e
- https://git.kernel.org/stable/c/41e192ad2779cae0102879612dfe46726e4396aa
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50230
- https://nvd.nist.gov/vuln/detail/CVE-2024-50230
- https://launchpad.net/bugs/cve/CVE-2024-50230
- https://security-tracker.debian.org/tracker/CVE-2024-50230
- https://ubuntu.com/security/CVE-2024-50230
- https://git.kernel.org/linus/41e192ad2779cae0102879612dfe46726e4396aa
Frequently Asked Questions
What is the severity of CVE-2024-50230?
CVE-2024-50230 is classified as a moderate severity vulnerability affecting the Linux kernel.
How do I fix CVE-2024-50230?
To fix CVE-2024-50230, update the Linux kernel to a version that includes the patch for this vulnerability.
What versions of the Linux kernel are affected by CVE-2024-50230?
CVE-2024-50230 affects multiple versions of the Linux kernel ranging from 3.10 to 6.12-rc5.
Is CVE-2024-50230 applicable to all Linux distributions?
CVE-2024-50230 is relevant to any Linux distribution that utilizes the affected versions of the Linux kernel.
What should I do if I'm unable to apply the patch for CVE-2024-50230?
If unable to patch for CVE-2024-50230, consider implementing additional security measures such as restricting file system access.
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