CVE-2024-39469: nilfs2: fix nilfs_empty_dir() misjudgment and long loop on I/O errors
In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix nilfsemptydir() misjudgment and long loop on I/O errors
The error handling in nilfsemptydir() when a directory folio/page read fails is incorrect, as in the old ext2 implementation, and if the folio/page cannot be read or nilfscheckfolio() fails, it will falsely determine the directory as empty and corrupt the file system.
In addition, since nilfsemptydir() does not immediately return on a failed folio/page read, but continues to loop, this can cause a long loop with I/O if isize of the directory's inode is also corrupted, causing the log writer thread to wait and hang, as reported by syzbot.
Fix these issues by making nilfsemptydir() immediately return a false value (0) if it fails to get a directory folio/page.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1Fixed in 6.12.27-1 - Upgrade
Upgrade
debian/linux-6.1to a version that resolves this vulnerability.Fixed in 6.1.129-1~deb11u1
Event History
Frequently Asked Questions
What is the severity of CVE-2024-39469?
CVE-2024-39469 is classified as a moderate severity vulnerability in the Linux kernel.
How do I fix CVE-2024-39469?
To fix CVE-2024-39469, update to the patched versions of the Linux kernel, specifically 5.10.223-1, 5.10.226-1, 6.1.119-1, 6.1.123-1, 6.12.11-1, 6.12.12-1, or 6.1.119-1~deb11u1.
What systems are affected by CVE-2024-39469?
CVE-2024-39469 affects systems running vulnerable versions of the Linux kernel, particularly those mentioned in the remediation details.
What is the impact of CVE-2024-39469?
The impact of CVE-2024-39469 includes potential incorrect error handling during directory folio/page reads, leading to prolonged operations and failures.
Who is the vendor for CVE-2024-39469?
The vendor for CVE-2024-39469 is the Linux kernel community, which has released fixes for the vulnerability.