CVE-2026-80556: mmc: atmel-mci: Fix use-after-free in atmci_remove due to race condition
CSIRTS triage
- What
- Invalid OSD (Object Storage Device) indices from primary_temp are used without validation in libceph, causing memory corruption or crashes.
- Who is affected
- Systems running Linux kernel with Ceph client support enabled.
- Urgency
- Medium priority; CVSS 5.9 indicates moderate to significant impact and should be patched promptly.
- Action
- Apply a Linux kernel update that validates OSD indices before use.
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-2026-80556
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-2026-805560.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-80556 | coverage & exploitation status | NVD · CVE.org |
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