CVE-2026-64287: Linux, грешка в паметта

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Bound used_lrs when flushing the pKVM hyp vCPU flush_hyp_vcpu() copies the host vGIC state into the hyp's private vCPU on every run. The vGIC list register save and restore use used_lrs as their loop bound and expect it to stay within the number of implemented list registers. While this is generally the case, flush_hyp_vcpu() copies vgic_v3 verbatim and does not enforce this, so a value provided by the host is used at EL2 to index vgic_lr[] and access ICH_LR<n>_EL2 (host -> EL2). Fix by clamping used_lrs to the number of implemented list registers after the copy, as the trusted path already does in vgic_flush_lr_state(). The number of implemented list registers is constant after init, so it is replicated once from kvm_vgic_global_state.nr_lr into hyp_gicv3_nr_lr rather than read on every entry.

Засегнати продукти

• Linux Linux: be66e67f175096f283c9d5614c4991fc9e7ed975 преди 2c5e72b9fbf83fdfa724e9f1af0f418ccf8739b8; be66e67f175096f283c9d5614c4991fc9e7ed975 преди 9fa301d8298778dd799fa4dcf7a7f440715d146e; be66e67f175096f283c9d5614c4991fc9e7ed975 преди c646431865f4b1a5b14067233fa27b11e05e0d46; be66e67f175096f283c9d5614c4991fc9e7ed975 преди 7fca3fcef81c713bc82a37bf741e0f28e6d04a6f; be66e67f175096f283c9d5614c4991fc9e7ed975 преди 8cc8bbbfab14c22c5551d0dd19b208a44b141c76
• Linux Linux: 6.2; преди 6.2; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.4 до 7.1.*; 7.2 до *

Вид слабост

• CWE-125 Четене извън границите на буфера

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-64287
• https://nvd.nist.gov/vuln/detail/CVE-2026-64287
• https://git.kernel.org/stable/c/2c5e72b9fbf83fdfa724e9f1af0f418ccf8739b8
• https://git.kernel.org/stable/c/9fa301d8298778dd799fa4dcf7a7f440715d146e
• https://git.kernel.org/stable/c/c646431865f4b1a5b14067233fa27b11e05e0d46
• https://git.kernel.org/stable/c/7fca3fcef81c713bc82a37bf741e0f28e6d04a6f
• https://git.kernel.org/stable/c/8cc8bbbfab14c22c5551d0dd19b208a44b141c76