Kernel memory corruption via oversized QAT RSA input
Published Feb 26, 2025 · Updated Aug 5, 2026
Integer underflow in the Linux kernel Intel QAT RSA path allows local users to corrupt kernel memory with an oversized source buffer. The qat_rsa_enc and qat_rsa_dec paths subtract the request source length from the RSA key size before copying the scatterlist, without first rejecting a larger source. Reachability requires local access and an active Intel QAT RSA implementation; resulting corruption can crash the kernel or affect kernel data.
Summary
What happened
Integer underflow in the Linux kernel Intel QAT RSA path allows local users to corrupt kernel memory with an oversized source buffer. The qat_rsa_enc and qat_rsa_dec paths subtract the request source length from the RSA key size before copying the scatterlist, without first rejecting a larger source. Reachability requires local access and an active Intel QAT RSA implementation; resulting corruption can crash the kernel or affect kernel data.
The record
- CVE
- CVE-2022-49563
- Published
- Feb 26, 2025
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-191, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 26, 2025CVE publishedPublication date reported by the CVE source.
- Aug 5, 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?
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- Affected versionversion=4.3
- Affected versionversion=a990532023b903b10cf14736241cdd138e4bc92c <4d6d2adce08788b7667a6e58002682ea1bbf6a79
- Affected versionversion=a990532023b903b10cf14736241cdd138e4bc92c <9714061423b8b24b8afb31b8eb4df977c63f19c4
- Affected versionversion=a990532023b903b10cf14736241cdd138e4bc92c <f993321e50ba7a8ba4f5b19939e1772a921a1c42
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What is affected?
Published CVSS scores
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Attacks
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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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