CVE-2026-48864: Libsolv: heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data
CSIRTS triage
- What
- A heap buffer overflow exists in libsolv's repopagestore function during decompression of malicious .solv page data.
- Who is affected
- Systems using libsolv for package management or dependency resolution are affected.
- Urgency
- High severity (CVSS 7.8) and not yet exploited; patching should be prioritized.
- Action
- Update libsolv to the latest patched version.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48864
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-2026-488640.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-48864 | coverage & exploitation status | NVD · CVE.org |
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