Arm C1-Ultra race condition

Summaryinfo

A vulnerability was found in Arm C1-Ultra, C1-Premium, Neoverse V3, Neoverse V3AE, Neoverse V1, Neoverse N2, Neoverse N1, Cortex-X925, Cortex-X4, Cortex-X3, Cortex-X2, Cortex-X1, Cortex-X1C, Cortex-A710, Cortex-A78, Cortex-A78AE, Cortex-A78C, Cortex-A77, Cortex-A76 and Cortex-A76AE. It has been classified as critical. Affected by this vulnerability is an unknown functionality. The manipulation leads to race condition. This vulnerability is traded as CVE-2025-10263. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Arm C1-Ultra, C1-Premium, Neoverse V3, Neoverse V3AE, Neoverse V1, Neoverse N2, Neoverse N1, Cortex-X925, Cortex-X4, Cortex-X3, Cortex-X2, Cortex-X1, Cortex-X1C, Cortex-A710, Cortex-A78, Cortex-A78AE, Cortex-A78C, Cortex-A77, Cortex-A76 and Cortex-A76AE. This issue affects an unknown code block. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at developer.arm.com. The identification of this vulnerability is CVE-2025-10263 since 09/11/2025. The technical details are unknown and an exploit is not publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-210084). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Arm

Name

• C1-Premium
• C1-Ultra
• Cortex-A76
• Cortex-A76AE
• Cortex-A77
• Cortex-A78
• Cortex-A78AE
• Cortex-A78C
• Cortex-A710
• Cortex-X1
• Cortex-X1C
• Cortex-X2
• Cortex-X3
• Cortex-X4
• Cortex-X925
• Neoverse N1
• Neoverse N2
• Neoverse V1
• Neoverse V3
• Neoverse V3AE

License

• commercial

CPE 2.3info

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CPE 2.2info

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Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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