Bug 2468076 (CVE-2026-43308)

Summary: CVE-2026-43308 kernel: btrfs: don't BUG() on unexpected delayed ref type in run_one_delayed_ref()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's Btrfs filesystem. An unexpected delayed reference type in the `run_one_delayed_ref()` function could lead to a system crash. This vulnerability could allow a local attacker to cause a denial of service (DoS) by triggering the unexpected reference type.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-05-08 14:03:14 UTC
In the Linux kernel, the following vulnerability has been resolved:

btrfs: don't BUG() on unexpected delayed ref type in run_one_delayed_ref()

There is no need to BUG(), we can just return an error and log an error
message.