{"cve":"CVE-2021-47521","nvd":{"published":"2024-05-24T15:15:14.203","modified":"2026-06-17T04:17:41.110","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: sja1000: fix use after free in ems_pcmcia_add_card()\n\nIf the last channel is not available then \"dev\" is freed.  Fortunately,\nwe can just use \"pdev->irq\" instead.\n\nAlso we should check if at least one channel was set up.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-416"],"references":["https://git.kernel.org/stable/c/1a295fea90e1acbe80c6d4940f5ff856edcd6bec","https://git.kernel.org/stable/c/1dd5b819f7e406dc15bbc7670596ff25261aaa2a","https://git.kernel.org/stable/c/3ec6ca6b1a8e64389f0212b5a1b0f6fed1909e45","https://git.kernel.org/stable/c/474f9a8534f5f89841240a7e978bafd6e1e039ce","https://git.kernel.org/stable/c/923f4dc5df679f678e121c20bf2fd70f7bf3e288"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47521","score":0.00242,"percentile":0.15471,"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."]}