CVE-2026-74374: md/raid1,raid10: fix error-path detection with md_cloned_bio()
CSIRTS triage
- What
- The md/raid1 and md/raid10 drivers misdetect errors in clone bio error paths, causing incorrect recovery behavior.
- Who is affected
- Systems using Linux software RAID 1 or RAID 10 arrays, especially those with recovery or resync operations.
- Urgency
- Medium severity (CVSS 4.1); no known exploitation but error detection faults degrade array reliability.
- Action
- Apply kernel patch that corrects error-path detection using md_cloned_bio in RAID1/10 drivers.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74374
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-743740.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 28% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-74374 | coverage & exploitation status | NVD · CVE.org |
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