In the Linux kernel, the following vulnerability has been resolved: f2fs: avoid reading already updated pages during GC We found the following issue…
A vulnerability in the Linux kernel's f2fs filesystem was identified and resolved. The issue involves the garbage collection (GC) process reading pages that have already been updated, which can trigger kernel bugs and potentially cause system instability. This occurs because the GC initiates I/O on pages unnecessarily, despite them being marked as up-to-date after being moved. The problem was discovered through fuzz testing and is related to a previously reported issue causing encrypted file corruption. The vulnerability affects multiple Ubuntu versions prior to specific kernel releases.
AI Analysis
Technical Summary
The Linux kernel f2fs filesystem had a vulnerability where during garbage collection, pages that were already updated and marked as up-to-date could be read again, triggering a kernel BUG due to improper handling of page states. This was identified through fuzz testing and is consistent with a known issue fixed by commit 9bf1a3f, which prevents initiating I/O on pages that have already been updated and moved to new block addresses. The flaw could cause kernel crashes during garbage collection operations.
Potential Impact
The vulnerability can cause kernel crashes (denial of service) due to a BUG triggered when the garbage collection process reads pages that have already been updated. There is no indication of confidentiality or integrity impact. The impact is limited to availability, potentially causing system instability or crashes during filesystem garbage collection.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to avoid reading already updated pages during garbage collection in the f2fs filesystem. Users should update their Linux kernel to a version that includes this fix. The affected Ubuntu kernel versions are prior to 7.0.0-28.28~24.04.1, 7.0.0-28.28, 7.0.0-1009.9, and 7.0.0-1010.10. Patch status is confirmed by the resolved commit referenced in the description. No additional mitigation is required once the kernel is updated.
In the Linux kernel, the following vulnerability has been resolved: f2fs: avoid reading already updated pages during GC We found the following issue…
Description
A vulnerability in the Linux kernel's f2fs filesystem was identified and resolved. The issue involves the garbage collection (GC) process reading pages that have already been updated, which can trigger kernel bugs and potentially cause system instability. This occurs because the GC initiates I/O on pages unnecessarily, despite them being marked as up-to-date after being moved. The problem was discovered through fuzz testing and is related to a previously reported issue causing encrypted file corruption. The vulnerability affects multiple Ubuntu versions prior to specific kernel releases.
CVSS v3.1
Score 5.5medium
Affected software
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protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel f2fs filesystem had a vulnerability where during garbage collection, pages that were already updated and marked as up-to-date could be read again, triggering a kernel BUG due to improper handling of page states. This was identified through fuzz testing and is consistent with a known issue fixed by commit 9bf1a3f, which prevents initiating I/O on pages that have already been updated and moved to new block addresses. The flaw could cause kernel crashes during garbage collection operations.
Potential Impact
The vulnerability can cause kernel crashes (denial of service) due to a BUG triggered when the garbage collection process reads pages that have already been updated. There is no indication of confidentiality or integrity impact. The impact is limited to availability, potentially causing system instability or crashes during filesystem garbage collection.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to avoid reading already updated pages during garbage collection in the f2fs filesystem. Users should update their Linux kernel to a version that includes this fix. The affected Ubuntu kernel versions are prior to 7.0.0-28.28~24.04.1, 7.0.0-28.28, 7.0.0-1009.9, and 7.0.0-1010.10. Patch status is confirmed by the resolved commit referenced in the description. No additional mitigation is required once the kernel is updated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-53018
- Osv Schema Version
- 1.7.0
- Aliases
- []
- 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","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a5a015291ae9bcd3f802549
Added to database: 07/17/2026, 10:17:54 UTC
Last enriched: 07/30/2026, 20:53:13 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 2
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