Kernel-memory disclosure via uninitialized ioctl padding
Published Dec 9, 2023 · Updated Aug 2, 2024
Information disclosure in the Linux kernel 6.6.5 and earlier allows local users to read kernel memory through a Habana AI accelerator ioctl. The sec_attest_info handler copies its response structure to user space without initializing info->pad0, exposing residual kernel data in that padding field. Exploitation requires low-privileged local access and an installed, reachable habanalabs driver for a supported Habana AI processor.
Summary
What happened
Information disclosure in the Linux kernel 6.6.5 and earlier allows local users to read kernel memory through a Habana AI accelerator ioctl. The sec_attest_info handler copies its response structure to user space without initializing info->pad0, exposing residual kernel data in that padding field. Exploitation requires low-privileged local access and an installed, reachable habanalabs driver for a supported Habana AI processor.
The record
- CVE
- CVE-2023-50431
- Published
- Dec 9, 2023
- Updated
- Aug 2, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 9, 2023CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Attacks
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Public exploit references
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Technologies
Your stack
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