Secure-context read or write via VLLDM exceptions
Published Aug 23, 2021 · Updated Aug 4, 2024
Improper exception handling in VLLDM on affected Arm processors allows local users to read or write part of a Secure context. When VLLDM runs during a Secure-to-Non-secure transition, an exception can expose Secure floating-point state to the Non-secure handler instead of keeping the contexts isolated. Exploitation requires local high-privilege control of the Non-secure handler, and the bounded consequence is disclosure or modification of part of the Secure context without service interruption.
Summary
What happened
Improper exception handling in VLLDM on affected Arm processors allows local users to read or write part of a Secure context. When VLLDM runs during a Secure-to-Non-secure transition, an exception can expose Secure floating-point state to the Non-secure handler instead of keeping the contexts isolated. Exploitation requires local high-privilege control of the Non-secure handler, and the bounded consequence is disclosure or modification of part of the Secure context without service interruption.
The record
- CVE
- CVE-2021-35465
- Published
- Aug 23, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Aug 23, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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