CVE-2026-23345

A flaw was found in the Linux kernel. When the FEATLPA2 feature is enabled on ARM64 systems, the kernel incorrectly handles the PTESHARED bits in Graphics Control System GCS memory mappings. This misconfiguration can lead to a kernel paging request and subsequently a system panic, resulting in a...

CVE-2026-23345

The CVE-2026-23345 issue affects the Linux kernel on ARM64 with Graphics Control System (GCS) mappings when FEAT_LPA2 is enabled. The root cause is incorrect handling of PTE_SHARED bits in GCS memory mappings, which can trigger a kernel panic (DoS) due to a bad page table translation. The recomme...

CVE-2026-23345

In the Linux kernel, the following vulnerability has been resolved: arm64: gcs: Do not set PTESHARED on GCS mappings if FEATLPA2 is enabled When FEATLPA2 is enabled, bits 8-9 of the PTE replace the shareability attribute with bits 50-51 of the output address. The PAGEGCS,RO definitions include th...