CVE-2026-43308

MEDIUMNVD 5.55.5—

5.5

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.

CVSS v3: 5.5
EG Score: 5.5(high)
EPSS: 3.1%
KEV: Not listed

Published

May 8, 2026

Last Modified

May 15, 2026

References (2)

416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5549743e11c06da23cfa7712a994b9f1e69064c6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c7d1d4ff56744074e005771aff193b927392d51f

Vendor Advisories for CVE-2026-43308(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Frequently asked(5)

What is CVE-2026-43308?

CVE-2026-43308 is a medium vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: btrfs: don't BUG() on unexpected delayed ref type in runonedelayed_ref() There is no need to BUG(), we can just return an error and log an error message.

When was CVE-2026-43308 disclosed?

CVE-2026-43308 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-43308 actively exploited?

CVE-2026-43308 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-43308?

CVE-2026-43308 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2026-43308?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43308, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2026-43308

📅 Published

🔄 Last Modified

🔗 References (2)

📣 Vendor Advisories for CVE-2026-43308(2)

❓ Frequently asked(5)