CVE-2026-31431 - Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability (known exploited)
Added to CISA KEV on 2026-05-01. Linux Kernel contains an incorrect resource transfer between spheres vulnerability that could allow for privilege escalation.
CRITICAL
CISA KEV
ACTIVELY EXPLOITED
Severity & confidence
Source severitycritical
Platform severitycritical
Confidenceconfirmed
Exploitationactively exploited
CVSS-
Affected
Vendorslinux
ProductsKernel
CountriesEU
Reporting sources (3)
CISA - Known Exploited Vulnerabilities
CERT-EU - Security Advisories
CISA - Cybersecurity Advisories
๐ฏ Why should I care?
- On the CISA Known Exploited Vulnerabilities list.
- Credible sources report active exploitation in the wild.
Timeline & provenance
Published2026-05-01T00:00:00
Last updated2026-10-21T06:39:57
Ingested2026-08-21T04:39:10
FreshnessNEAR-REAL-TIME
Threat typeexploitation
Recommended action
Apply the vendor-supplied patch immediately. Review vendor and CISA guidance for detection and mitigation.
Next steps
- Identify affected systems in your environment.
- Apply the vendor patch or mitigation guidance.
- Review logs for indicators described in the advisory.
- Follow the affected vendor/product to track updates.
Confidence explanation
This object is reported by 3 independent sources.
Source type: gov ยท Original: CISA - Known Exploited Vulnerabilities
