CVE-2026-72279

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Respect read-only PFN when mapping L1 VNCR KVM currently maps the L1 VNCR into the host stage-1 by relying entirely on the permissions of the guest stage-1. At the same time, it is entirely possible that the backing PFN is read-only (e.g. RO memslot), meaning that the L1 VNCR should use at most a read-only mapping. Cache the writability of the PFN in the VNCR TLB and use it to constrain the resulting fixmap permissions. Promote VNCR permission faults to an SEA in the case where the guest attempts to write to a read-only endpoint. Conveniently, this also plugs a page leak found by Sashiko [*] resulting from the early return for a read-only PFN.

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Produits concernés

• Linux

Scores CVSS

Références

• https://git.kernel.org/stable/c/2684e02bac41c5220f6c1ab2bdcc957b71812977
• https://git.kernel.org/stable/c/5c50db5bcbb9073cb2fd97be51b962de92f429e9
• https://git.kernel.org/stable/c/d35defbdfcb15296ebe28968ad7452c1a8c11cea

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories