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CVE-2026-80831

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Last modified

CVE-2026-80831 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: crypto: mxs-dcp - fix source scatterlist length access mxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source scatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid and could return zero or a stale DMA length, causing encryption and decryption to process the wrong number of bytes when CONFIG_NEED_SG_DMA_LENGTH=y. Use the original scatterlist length instead..

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: mxs-dcp - fix source scatterlist length access mxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source scatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid and could return zero or a stale DMA length, causing encryption and decryption to process the wrong number of bytes when CONFIG_NEED_SG_DMA_LENGTH=y. Use the original scatterlist length instead.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5, < fd0f211b27a6ec2ebd8c315683401b43adcc5511; >= 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5, < 04201dcc88b26eac52f736e39727fc5c420b7257; >= 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5, < e72a795df521cb65b7c4705cc11078cdacfaa2f4; >= 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5, < 1537bd55b4f842565068c54b47cd2ae1777d5f8f; >= 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5, < da14fae5203b72ca71ccfa9af8de9249e40d533a; >= 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5, < 182f16a20d329a1c818d51dad57d9bf43d356c7c; >= 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5, < 0e9edb108a63bbbef952dfcbc597e34ed9c1fb74; >= 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5, < 6ef9a4afb52cb102ab038cd42352c142d8505d09; >= 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5, < c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8
LinuxLinux3.14

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-80831?
In the Linux kernel, the following vulnerability has been resolved: crypto: mxs-dcp - fix source scatterlist length access mxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source scatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid and could return zero or a stale DMA length, causing encryption and decryption to process the wrong number of bytes when CONFIG_NEED_SG_DMA_LENGTH=y. Use the original scatterlist length instead.
How severe is CVE-2026-80831?
Severity scoring for CVE-2026-80831 is pending analysis.
How do I fix CVE-2026-80831?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST