WORLD WATCH · October 19, 2026 · NEWS
Linux KVM guest-host escape CVE-2026-99999 rated critical
CVE-2026-99999 is a Linux KVM guest-host escape called PwnEscape.
- Reported by
- The Register
- Outlets reporting
- 1
- Category
- NEWS
- Identifiers
- CVE-2026-99999
- Newest report
- October 19, 2026
Plain-English brief. Written for readers who work in a second language.
Key takeaways
- CVE-2026-99999 is a Linux KVM guest-host escape called PwnEscape.
- The Register reported the flaw on 2026-10-19.
- The flaw has a 9.3 rating and is rated critical.
- The flaw may represent a new way to attack penguin-powered networking.
What happened
The report comes from The Register. The report was published on 2026-10-19. The flaw has a 9.3 rating. The flaw is rated critical. The flaw may represent a new way to attack penguin-powered networking.
Why it matters
The flaw is rated critical.
What to do
- Track vendor updates for CVE-2026-99999 and PwnEscape.
- Review Linux KVM guest isolation and host access.
- Monitor The Register for further reporting.
SOURCE: INTEL128 WORLD WATCH (UPDATED OCT 19, 2026). This brief summarizes reporting by The Register. Intel128 writes the summary and credits the outlet. Read the summary as a starting point, not as a substitute for the original reporting.