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.

EPSS

0.2% chance of exploitation in the next 30 days; higher than 5% of CVEs (scores of 2026-10-25)

Published

2026-09-04

Modified

2026-10-19

Record from

the NVD, synced 2026-10-19

References

• https://git.kernel.org/stable/c/04201dcc88b26eac52f736e39727fc5c420b7257
• https://git.kernel.org/stable/c/0e9edb108a63bbbef952dfcbc597e34ed9c1fb74
• https://git.kernel.org/stable/c/1537bd55b4f842565068c54b47cd2ae1777d5f8f
• https://git.kernel.org/stable/c/182f16a20d329a1c818d51dad57d9bf43d356c7c
• https://git.kernel.org/stable/c/6ef9a4afb52cb102ab038cd42352c142d8505d09

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