{"cve":"CVE-2026-53171","nvd":{"published":"2026-06-25T09:16:34.457","modified":"2026-07-06T18:24:07.710","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/ethosu: fix arithmetic issues in dma_length()\n\ndma_length() derives DMA region usage from command stream values and\nupdates region_size[]:\n\n    len = ((len + stride[0]) * size0 + stride[1]) * size1\n    region_size[region] = max(..., len + dma->offset)\n\nSeveral arithmetic issues can corrupt the derived region size:\n\n- signed stride values may underflow when added to len\n- intermediate multiplications may overflow\n- len + dma->offset may overflow during region_size updates\n- dma_length() error returns were not validated by the caller\n\nregion_size[] is later used by ethosu_job.c to validate command stream\naccesses against GEM buffer sizes. Arithmetic wraparound can therefore\nunder-report region usage and bypass the bounds validation.\n\nFix by validating signed additions, using overflow helpers for\nmultiplications and offset updates, and propagating dma_length()\nfailures to the caller.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":8.8},"cwes":[],"references":["https://git.kernel.org/stable/c/6bb73845d1855ceaf50e397175e5979a7bdf69bc","https://git.kernel.org/stable/c/ee6d9b6e51626f259c6f0e38d94f91be4fd14754"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:41:17.107060303+00:00"},"epss":{"cve":"CVE-2026-53171","score":0.00175,"percentile":0.07002,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}