CVE-2026-64286: Linux, грешка в паметта

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Clear __hyp_running_vcpu when flushing the pKVM hyp vCPU flush_hyp_vcpu() copies the host vCPU context into the hyp's private vCPU on every run. ctxt_to_vcpu() expects a guest context to have a NULL __hyp_running_vcpu, which is only ever set on the host context, so that it resolves the vCPU via container_of(). While this is generally the case, flush_hyp_vcpu() copies the context verbatim and does not enforce this, so a value provided by the host is dereferenced at EL2 (host -> EL2). Fix by clearing __hyp_running_vcpu after the copy.

Засегнати продукти

• Linux Linux: be66e67f175096f283c9d5614c4991fc9e7ed975 преди 477145860dba4c30f0b4e36f02f4c5291c1c888b; be66e67f175096f283c9d5614c4991fc9e7ed975 преди dfaef40d8a1533940fc1af788d70fce07362b4ce; be66e67f175096f283c9d5614c4991fc9e7ed975 преди 6bea2f8becdb20d34378493c3b77a9b9cf8c6cfa; be66e67f175096f283c9d5614c4991fc9e7ed975 преди d4f4d61715d1061ba83b88196a3605662be30750; be66e67f175096f283c9d5614c4991fc9e7ed975 преди e8042f6e1d7befb2fb6b10a75918642bcd0acf9a
• Linux Linux: 6.2; преди 6.2; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.39 до 6.18.*; 7.1.4 до 7.1.*; от 7.2 нататък

Вид слабост

• CWE-822 Untrusted Pointer Dereference

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-64286
• https://nvd.nist.gov/vuln/detail/CVE-2026-64286
• https://git.kernel.org/stable/c/477145860dba4c30f0b4e36f02f4c5291c1c888b
• https://git.kernel.org/stable/c/dfaef40d8a1533940fc1af788d70fce07362b4ce
• https://git.kernel.org/stable/c/6bea2f8becdb20d34378493c3b77a9b9cf8c6cfa
• https://git.kernel.org/stable/c/d4f4d61715d1061ba83b88196a3605662be30750
• https://git.kernel.org/stable/c/e8042f6e1d7befb2fb6b10a75918642bcd0acf9a