In the Linux kernel, the following vulnerability has been resolved: ext4: replace BUG_ON with proper error handling in ext4_read_inline_folio… (CVE-2026-31451)
In the Linux kernel, the following vulnerability has been resolved: ext4: replace BUG_ON with proper error handling in ext4_read_inline_folio Replace BUG_ON() with proper error handling when inline data size exceeds PAGE_SIZE. This prevents kernel panic and allows the system to continue running while properly reporting the filesystem corruption. The error is logged via ext4_error_inode(), the buffer head is released to prevent memory leak, and -EFSCORRUPTED is returned to indicate filesystem corruption.
AI Analysis
Technical Summary
The vulnerability in the Linux kernel ext4 filesystem involved the use of BUG_ON() in ext4_read_inline_folio when inline data size exceeded PAGE_SIZE, which caused a kernel panic. The fix replaces BUG_ON() with proper error handling that logs the error via ext4_error_inode(), releases the buffer head to prevent memory leaks, and returns -EFSCORRUPTED to indicate filesystem corruption. This change prevents the system from crashing and allows it to continue running despite the filesystem error. The vulnerability is addressed in Linux kernel versions 6.8.0-1061.64~22.04.1 and later. The patch is included in Ubuntu security notices USN-8567-1 and USN-8574-1, which cover multiple kernel vulnerabilities and require system reboot after update.
Potential Impact
The vulnerability can cause a denial of service by triggering a kernel panic when ext4 inline data size exceeds PAGE_SIZE. There is no confidentiality or integrity impact reported. The system stability is improved by preventing kernel panic and allowing the system to continue running while properly reporting filesystem corruption.
Mitigation Recommendations
An official patch is available and included in Ubuntu security updates (USN-8567-1, USN-8574-1). Users should update their Linux kernel to version 6.8.0-1061.64~22.04.1 or later as provided by their distribution. A system reboot is required after applying the update. Due to an ABI change, third-party kernel modules must be recompiled and reinstalled. Follow vendor instructions for updating and recompiling kernel modules.
In the Linux kernel, the following vulnerability has been resolved: ext4: replace BUG_ON with proper error handling in ext4_read_inline_folio… (CVE-2026-31451)
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: replace BUG_ON with proper error handling in ext4_read_inline_folio Replace BUG_ON() with proper error handling when inline data size exceeds PAGE_SIZE. This prevents kernel panic and allows the system to continue running while properly reporting the filesystem corruption. The error is logged via ext4_error_inode(), the buffer head is released to prevent memory leak, and -EFSCORRUPTED is returned to indicate filesystem corruption.
CVSS v3.1
Score 5.5medium
Affected software
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protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingRun on your own infrastructure? 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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in the Linux kernel ext4 filesystem involved the use of BUG_ON() in ext4_read_inline_folio when inline data size exceeded PAGE_SIZE, which caused a kernel panic. The fix replaces BUG_ON() with proper error handling that logs the error via ext4_error_inode(), releases the buffer head to prevent memory leaks, and returns -EFSCORRUPTED to indicate filesystem corruption. This change prevents the system from crashing and allows it to continue running despite the filesystem error. The vulnerability is addressed in Linux kernel versions 6.8.0-1061.64~22.04.1 and later. The patch is included in Ubuntu security notices USN-8567-1 and USN-8574-1, which cover multiple kernel vulnerabilities and require system reboot after update.
Potential Impact
The vulnerability can cause a denial of service by triggering a kernel panic when ext4 inline data size exceeds PAGE_SIZE. There is no confidentiality or integrity impact reported. The system stability is improved by preventing kernel panic and allowing the system to continue running while properly reporting filesystem corruption.
Mitigation Recommendations
An official patch is available and included in Ubuntu security updates (USN-8567-1, USN-8574-1). Users should update their Linux kernel to version 6.8.0-1061.64~22.04.1 or later as provided by their distribution. A system reboot is required after applying the update. Due to an ABI change, third-party kernel modules must be recompiled and reinstalled. Follow vendor instructions for updating and recompiling kernel modules.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-31451
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:16.04:LTS","Ubuntu:Pro:FIPS:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:FIPS-updates:18.04:LTS","Ubuntu:Pro:FIPS:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro:FIPS-updates:20.04:LTS","Ubuntu:Pro:FIPS:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Nvidia-BlueField:22.04:LTS","Ubuntu:Pro:FIPS-preview:22.04:LTS","Ubuntu:Pro:FIPS-updates:22.04:LTS","Ubuntu:Pro:Realtime:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Nvidia-BlueField:24.04:LTS","Ubuntu:Pro:FIPS-updates:24.04:LTS","Ubuntu:Pro:Realtime:24.04:LTS","Ubuntu:25.10"]
- Cvss Version
- 3.1
Threat ID: 6a5b62462d1edb114c88b70f
Added to database: 07/18/2026, 11:23:50 UTC
Last enriched: 08/01/2026, 05:48:33 UTC
Last updated: 09/13/2026, 22:01:33 UTC
Views: 19
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