CVE-2025-10263: Arm c1-Premium

Critical severity, CVSS 9.1. EPSS: 0.5% chance of exploitation in the next 30 days.

Arm C1-Ultra, C1-Premium, Neoverse V3 & V3AE, Neoverse V2, Neoverse V1, Neoverse-N2, Neoverse-N1, Cortex-X925, Cortex-X4, Cortex-X3, Cortex-X2, Cortex-X1 & X1C, Cortex-A710, Cortex-A78, A78AE & A78C, Cortex-A77, Cortex-A76 & A76A may allow writes to resources owned by a higher exception level.

Affected products

• Arm c1-Premium: version 0 only
• Arm c1-Ultra: version 0 only
• Arm Cortex-a710: version 0 only
• Arm Cortex-a76: version 0 only
• Arm Cortex-a76ae: version 0 only
• Arm Cortex-a77: version 0 only
• Arm Cortex-a78: version 0 only
• Arm Cortex-a78ae: version 0 only
• Arm Cortex-a78c: version 0 only
• Arm Cortex-x1: version 0 only
• Arm Cortex-x1c: version 0 only
• Arm Cortex-x2: version 0 only
• Arm Cortex-x3: version 0 only
• Arm Cortex-x4: version 0 only
• Arm Cortex-x925: version 0 only
• Arm Neoverse n1: version 0 only
• Arm Neoverse n2: version 0 only
• Arm Neoverse v1: version 0 only
• Arm Neoverse v3: version 0 only
• Arm Neoverse v3ae: version 0 only
• Red Hat Red Hat Enterprise Linux 10: before 0:6.12.0-211.30.1.el10_2 (fixed in 0:6.12.0-211.30.1.el10_2)
• Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support: before 0:6.12.0-55.98.1.el10_0 (fixed in 0:6.12.0-55.98.1.el10_0)
• Red Hat Red Hat Enterprise Linux 6
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8: before 0:4.18.0-553.140.1.rt7.481.el8_10 (fixed in 0:4.18.0-553.140.1.rt7.481.el8_10); before 0:4.18.0-553.140.1.el8_10 (fixed in 0:4.18.0-553.140.1.el8_10)
• and 23 more

Published 2026-06-09. Last modified 2026-09-04.