CVE-2023-4394: Memory leak in btrfs_get_dev_args_from_path()
First published: Mon Aug 15 2022(Updated: )
A use-after-free flaw was found in btrfs_get_dev_args_from_path in fs/btrfs/volumes.c in btrfs file-system in the Linux Kernel. In this flaw a local attacker with some special privilege may cause a system crash or a leak of internal kernel information. In btrfs_get_dev_args_from_path(), btrfs_get_bdev_and_sb() can fail if the path is invalid. In this case, btrfs_get_dev_args_from_path() returns directly without freeing args->uuid and args->fsid allocated before, which causes memory leaks. References: <a href="https://patchwork.kernel.org/project/linux-btrfs/patch/20220815151606.3479183-1-r33s3n6@gmail.com/">https://patchwork.kernel.org/project/linux-btrfs/patch/20220815151606.3479183-1-r33s3n6@gmail.com/</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/Kernel | <6.0 | 6.0 |
| Linux kernel | <6.0 | |
| Linux kernel | =6.0-rc1 | |
| Linux kernel | =6.0-rc2 | |
| Linux Kernel | <6.0 | |
| Linux Kernel | =6.0-rc1 | |
| Linux Kernel | =6.0-rc2 |
Remedy
https://patchwork.kernel.org/project/linux-btrfs/patch/20220815151606.3479183-1-r33s3n6@gmail.com/
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Reference Links
- https://access.redhat.com/security/cve/CVE-2023-4394
- https://bugzilla.redhat.com/show_bug.cgi?id=2219263
- https://patchwork.kernel.org/project/linux-btrfs/patch/20220815151606.3479183-1-r33s3n6@gmail.com/
- https://www.cve.org/CVERecord?id=CVE-2023-4394 https://nvd.nist.gov/vuln/detail/CVE-2023-4394 https://patchwork.kernel.org/project/linux-btrfs/patch/20220815151606.3479183-1-r33s3n6@gmail.com/
- https://access.redhat.com/security/cve/cve-2023-4394
Frequently Asked Questions
What is the severity of CVE-2023-4394?
CVE-2023-4394 has a severity rating that indicates it can lead to system crashes or kernel information leaks.
How do I fix CVE-2023-4394?
To mitigate CVE-2023-4394, upgrade the Linux Kernel to version 6.0 or later.
What causes CVE-2023-4394?
CVE-2023-4394 is caused by a use-after-free flaw in the btrfs file system's kernel code.
Who is affected by CVE-2023-4394?
Local attackers with certain privileges can exploit CVE-2023-4394 to cause system disruptions.
What systems are vulnerable to CVE-2023-4394?
CVE-2023-4394 affects versions of the Linux Kernel up to and including version 6.0.
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