- Vulnerability/
- CVE-2024-27069
CVE-2024-27069: ovl: relax WARN_ON in ovl_verify_area()
First published: Wed May 01 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: ovl: relax WARN_ON in ovl_verify_area() syzbot hit an assertion in copy up data loop which looks like it is the result of a lower file whose size is being changed underneath overlayfs. This type of use case is documented to cause undefined behavior, so returning EIO error for the copy up makes sense, but it should not be causing a WARN_ON assertion.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.10-1 6.12.11-1 |
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Reference Links
- https://git.kernel.org/stable/c/77a28aa476873048024ad56daf8f4f17d58ee48e
- https://git.kernel.org/stable/c/c3c85aefc0da1e5074a06c682542a54ccc99bdca
- https://launchpad.net/bugs/cve/CVE-2024-27069
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27069
- https://nvd.nist.gov/vuln/detail/CVE-2024-27069
- https://security-tracker.debian.org/tracker/CVE-2024-27069
- https://ubuntu.com/security/CVE-2024-27069
- https://git.kernel.org/linus/77a28aa476873048024ad56daf8f4f17d58ee48e
Frequently Asked Questions
What is the severity of CVE-2024-27069?
CVE-2024-27069 has been classified as a medium severity vulnerability within the Linux kernel.
How does CVE-2024-27069 affect users?
CVE-2024-27069 can lead to potential data inconsistencies when using overlayfs due to changes in lower file sizes.
How do I fix CVE-2024-27069?
To resolve CVE-2024-27069, upgrade your Linux kernel to the patched versions: 5.10.223-1, 5.10.226-1, 6.1.119-1, 6.1.123-1, 6.12.10-1, or 6.12.11-1.
Is CVE-2024-27069 present in all Linux distributions?
CVE-2024-27069 is specifically noted in Debian's package of the Linux kernel and may affect other distributions depending on their kernel version.
What is the primary cause of CVE-2024-27069?
CVE-2024-27069 is caused by a race condition in the overlayfs implementation when a lower file's size is modified during file copy operations.
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