CVE-2026-43344: perf/x86/intel/uncore: Fix die ID init and look up bugs
CSIRTS triage
- What
- Die ID initialization and lookup logic in perf/x86/intel/uncore contains bugs that may cause incorrect memory access.
- Who is affected
- Systems running affected Linux kernel versions with Intel uncore performance monitoring.
- Urgency
- Medium severity with no exploitation reported; address in regular patching cycle.
- Action
- Apply Linux kernel patch fixing die ID initialization and lookup in perf/x86/intel/uncore.
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-2026-43344
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-2026-433440.10% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-43344 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
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