CVE-2026-80831
Full vulnerability record from the local CVENow database.
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.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-04 16:18:11.287000
Last modified
2026-10-19 09:17:18.260000
View original CVE JSON
{
"id": "CVE-2026-80831",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-04T16:18:11.287",
"lastModified": "2026-10-19T09:17:18.260",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: mxs-dcp - fix source scatterlist length access\n\nmxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source\nscatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid\nand could return zero or a stale DMA length, causing encryption and\ndecryption to process the wrong number of bytes when\nCONFIG_NEED_SG_DMA_LENGTH=y.\n\nUse the original scatterlist length instead."
}
],
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{
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"affectedData": [
{
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"defaultStatus": "unaffected",
"programFiles": [
"drivers/crypto/mxs-dcp.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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{
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}
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"metrics": {},
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}