{"cve":"CVE-2021-47586","nvd":{"published":"2024-06-19T15:15:53.160","modified":"2026-06-17T04:17:49.120","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: dwmac-rk: fix oob read in rk_gmac_setup\n\nKASAN reports an out-of-bounds read in rk_gmac_setup on the line:\n\n\twhile (ops->regs[i]) {\n\nThis happens for most platforms since the regs flexible array member is\nempty, so the memory after the ops structure is being read here.  It\nseems that mostly this happens to contain zero anyway, so we get lucky\nand everything still works.\n\nTo avoid adding redundant data to nearly all the ops structures, add a\nnew flag to indicate whether the regs field is valid and avoid this loop\nwhen it is not.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-125"],"references":["https://git.kernel.org/stable/c/0546b224cc7717cc8a2db076b0bb069a9c430794","https://git.kernel.org/stable/c/0b4a5d1e15ce72f69be48f38dc0401dab890ae0f","https://git.kernel.org/stable/c/0546b224cc7717cc8a2db076b0bb069a9c430794","https://git.kernel.org/stable/c/0b4a5d1e15ce72f69be48f38dc0401dab890ae0f"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:52:00.836172422+00:00"},"epss":{"cve":"CVE-2021-47586","score":0.00208,"percentile":0.10954,"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."]}