CVE-2026-79609

— UNSCORED

Published 2026-10-13 · Updated 2026-10-14

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD description

XPTI (Xen Page Table Isolation) was introduced to mitigate Meltdown (CVE-2017-5754, one aspect of XSA-254). This involves copying 64-bit PV guest page table entries from guest-chosen root page tables to the Xen- chosen one which is in actual use by hardware. To read the guest root page table, the directmap is used. PV guests, however, have a directmap which may not cover all memory; in particular this is the case if any memory extends beyond the 5 TiB (CONFIG_BIGMEM=y: 3.5 TiB) address boundary.

All references

https://xenbits.xenproject.org/xsa/advisory-516.html
http://xenbits.xen.org/xsa/advisory-516.html

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.