Affects Linux kernel KVM, a core virtualization component used across industries; potential host crash or VM escape.
CVE-2026-46113
KVM shadow paging UAF in Linux kernel; risk of host crash and VM escape.
Is CVE-2026-46113 being exploited?
Not confirmed. CVE-2026-46113 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.15% probability of exploitation in the next 30 days.
How severe is CVE-2026-46113?
CVE-2026-46113 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-46113?
Yes. A fix has been recorded for CVE-2026-46113. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-46113 affect?
CVE-2026-46113 affects Linux kernel (KVM). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-46113?
Patch kernel to fixed version and reboot hosts
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
KVM MMU shadow paging use-after-free may crash host or enable VM escape via guest page-table changes.
Immediate action required
- affected>= 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and < e9d4ea13aa2b6400bb10ec64b370ba3dadcd22f0
- affected>= 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and < 488e386484ec8c0e558be6e156edf34ed9f4d5c8
- affected>= 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and < 06c19c967b845b63172601fe459667d973b7e6b7
- affected>= 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and < 738ec97b1855df6c08fe2369f798fa0b972e556b
- affected>= 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and < 14d1e55dfd2cf4711bff164a6aaaddb783552134
- affected>= 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and < 0cb2af2ea66ad8ff195c156ea690f11216285bdf
- affected2.6.20
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.