{"cve":"CVE-2021-28693","nvd":{"published":"2021-06-30T11:15:08.117","modified":"2026-06-17T03:46:48.547","status":"Modified","description":"xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must \"scrub\" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.","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:N/A:N","score":5.5},"cwes":[],"references":["https://security.gentoo.org/glsa/202107-30","https://xenbits.xenproject.org/xsa/advisory-372.txt","https://security.gentoo.org/glsa/202107-30","https://xenbits.xenproject.org/xsa/advisory-372.txt"],"products":["xen:xen"],"source":"nvd","synced_at":"2026-10-19T21:20:07.141963181+00:00"},"epss":{"cve":"CVE-2021-28693","score":0.00321,"percentile":0.25191,"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."]}