btrfs: don't BUG() on unexpected delayed ref type in run_one_delayed_ref()
CVE-2026-43308 is a vulnerability related to the btrfs filesystem in the Linux kernel, specifically involving an unexpected delayed reference type in the run_one_delayed_ref() function. The vulnerability is identified by Microsoft Security Response Center and affects Microsoft Azure Linux kernel version 3.0. No CVSS score or detailed technical exploitation information is provided.
AI Analysis
Technical Summary
This vulnerability concerns the btrfs filesystem code path where the run_one_delayed_ref() function encounters an unexpected delayed reference type, which previously caused a BUG() kernel panic. The issue is tracked as CVE-2026-43308 by Microsoft Security Response Center and affects the Azure Linux kernel version 3.0. No further technical details or exploitation methods are disclosed in the provided data.
Potential Impact
The impact involves potential kernel instability or crashes due to the unexpected delayed reference type in the btrfs filesystem code. There is no information about active exploitation in the wild or additional consequences such as privilege escalation or data corruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft Security Response Center advisory for current remediation guidance. No official fix or patch links are provided in the available data.
btrfs: don't BUG() on unexpected delayed ref type in run_one_delayed_ref()
Description
CVE-2026-43308 is a vulnerability related to the btrfs filesystem in the Linux kernel, specifically involving an unexpected delayed reference type in the run_one_delayed_ref() function. The vulnerability is identified by Microsoft Security Response Center and affects Microsoft Azure Linux kernel version 3.0. No CVSS score or detailed technical exploitation information is provided.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability concerns the btrfs filesystem code path where the run_one_delayed_ref() function encounters an unexpected delayed reference type, which previously caused a BUG() kernel panic. The issue is tracked as CVE-2026-43308 by Microsoft Security Response Center and affects the Azure Linux kernel version 3.0. No further technical details or exploitation methods are disclosed in the provided data.
Potential Impact
The impact involves potential kernel instability or crashes due to the unexpected delayed reference type in the btrfs filesystem code. There is no information about active exploitation in the wild or additional consequences such as privilege escalation or data corruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft Security Response Center advisory for current remediation guidance. No official fix or patch links are provided in the available data.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-43308
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a343c53f198dc38c14d0152
Added to database: 06/18/2026, 18:43:31 UTC
Last enriched: 06/29/2026, 23:50:39 UTC
Last updated: 08/02/2026, 19:17:58 UTC
Views: 37
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