KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT (Linux Linux)
En bref
- Source
- NVD
- EPSS
- EPSS 0.17 % · centile 6 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- Linux
- Statut NVD
- Received
Rechercher sur…
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT FGUs don't actually require hardware support, so don't gate fgt trap config insertion on FGT. This is the only action required to allow FGUs always, as kvm_calculate_traps() already computes the FGU bits with or without FEAT_FGT. This also fixes a spurious WARN when a TLBI OS is run on a guest in vEL1 without FEAT_TLBIOS on non FEAT_FGT hardware. In this configuration the course-grained HCR_EL2.TTLBOS trap reaches the handler handle_tlbi_el1(), which expects an EL1 TLBI only from vEL2. With FGUs enabled the UNDEF will be injected without needing the specific handler. [oliver: Take Wei-Lin's suggested changelog]
Références
Références européennes
- ENISA EUVD · EUVD-2026-103967
- GCVE · GCVE-0-2026-98713
Avis du CERT-FR
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Produits affectés
| Produit | Versions |
|---|---|
| Linux · Linux | affected f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f < 2f4a15c52a552c5244ec27f4ca8bda855594f918 ; affected f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f < 1113374a17d7f7d16b02ee0bbd9b1e7a60cbb087 ; affected f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f < af3300b3a6bace925a496f3520e171c07b999c72 ; affected f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f < 4bdd2b3a708c1feb701cb8b62feb8ad2fd77bb07 |
| Linux · Linux | affected 6.9 ; unaffected 0 < 6.9 ; unaffected 6.12.113 ≤ 6.12.* ; unaffected 6.18.56 ≤ 6.18.* ; unaffected 7.2.10 ≤ 7.2.* ; unaffected 7.3 ≤ * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |