CVE-2024-47700: ext4: check stripe size compatibility on remount as well
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: ext4: check stripe size compatibility on remount as well We disable stripe size in __ext4_fill_super if it is not a multiple of the cluster ratio however this check is missed when trying to remount. This can leave us with cases where stripe < cluster_ratio after remount:set making EXT4_B2C(sbi->s_stripe) become 0 that can cause some unforeseen bugs like divide by 0. Fix that by adding the check in remount path as well.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=6.5<6.6.54 | |
| Linux Kernel | >=6.7<6.10.13 | |
| Linux Kernel | >=6.11<6.11.2 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
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Reference Links
- https://git.kernel.org/stable/c/faeff8b1ee2eaa5969c8e994d66c3337298cefed
- https://git.kernel.org/stable/c/297615e992bbb30a55c158141086be6505d5d722
- https://git.kernel.org/stable/c/a31b712f75445d52fc0451dc54fd7b16a552cb7c
- https://git.kernel.org/stable/c/ee85e0938aa8f9846d21e4d302c3cf6a2a75110d
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-47700
- https://nvd.nist.gov/vuln/detail/CVE-2024-47700
- https://launchpad.net/bugs/cve/CVE-2024-47700
- https://security-tracker.debian.org/tracker/CVE-2024-47700
- https://ubuntu.com/security/CVE-2024-47700
- https://git.kernel.org/linus/ee85e0938aa8f9846d21e4d302c3cf6a2a75110d
Frequently Asked Questions
What is the severity of CVE-2024-47700?
CVE-2024-47700 has been assigned a severity rating based on its potential impact on system stability and data integrity.
How do I fix CVE-2024-47700?
To fix CVE-2024-47700, update your Linux kernel to the latest version that addresses this vulnerability.
What versions of the Linux kernel are affected by CVE-2024-47700?
CVE-2024-47700 affects Linux kernel versions between 6.5 and 6.6.54, as well as 6.7 to 6.10.13, and 6.11 to 6.11.2.
What does CVE-2024-47700 exploit?
CVE-2024-47700 exploits a check for stripe size compatibility in the ext4 filesystem during the remount process.
Is it safe to use affected versions of the Linux kernel with CVE-2024-47700?
Using affected versions of the Linux kernel without remediation poses a risk to system stability and data integrity.
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