Memory corruption and overread via crypto_rng generation
Published Sep 4, 2026 · Updated Sep 4, 2026
Memory-safety flaws in Linux kernel 5.10 through 7.2.2 allow attackers to trigger stale DMA access and overread a seed buffer. The sun8i-ss crypto_rng generate function waits interruptibly for DMA without stopping an in-flight operation after a signal, and its seed copy reads ctx->slen bytes beyond d + dlen. Reachability requires the Allwinner sun8i-ss hardware path and the obsolete crypto_rng interface; the published record does not specify final impact or required privileges.
Summary
What happened
Memory-safety flaws in Linux kernel 5.10 through 7.2.2 allow attackers to trigger stale DMA access and overread a seed buffer. The sun8i-ss crypto_rng generate function waits interruptibly for DMA without stopping an in-flight operation after a signal, and its seed copy reads ctx->slen bytes beyond d + dlen. Reachability requires the Allwinner sun8i-ss hardware path and the obsolete crypto_rng interface; the published record does not specify final impact or required privileges.
The record
- CVE
- CVE-2026-80833
- Published
- Sep 4, 2026
- Updated
- Sep 4, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-416
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 4, 2026CVE publishedPublication date reported by the CVE source.
- Sep 4, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.10
- Affected versionversion=ac2614d721dea2ff273af19c6c5d508d58a2bb3e <8ab58786b4c63b8f1b6c522f33bb67a3c8c2791f
- Affected versionversion=ac2614d721dea2ff273af19c6c5d508d58a2bb3e <a78446ee6fae86ac8733f120e3ffce2e5d9384f5
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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