{"cve":"CVE-2021-3501","nvd":{"published":"2021-05-06T13:15:12.840","modified":"2026-08-05T22:17:05.870","status":"Modified","description":"A flaw was found in the Linux kernel in versions before 5.12. The value of internal.ndata, in the KVM API, is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.","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:H/A:H","score":7.1},"cwes":["CWE-787"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1950136","https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04c4f2ee3f68c9a4bf1653d15f1a9a435ae33f7a","https://security.netapp.com/advisory/ntap-20210618-0008/","https://bugzilla.redhat.com/show_bug.cgi?id=1950136","https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04c4f2ee3f68c9a4bf1653d15f1a9a435ae33f7a"],"products":["fedoraproject:fedora","linux:linux_kernel","netapp:cloud_backup","netapp:h300e_firmware","netapp:h300s_firmware","netapp:h410c_firmware","netapp:h410s_firmware","netapp:h500e_firmware","netapp:h500s_firmware","netapp:h700e_firmware","netapp:h700s_firmware","netapp:solidfire_baseboard_management_controller_firmware","redhat:enterprise_linux","redhat:enterprise_linux_for_real_time","redhat:enterprise_linux_for_real_time_for_nfv","redhat:enterprise_linux_for_real_time_for_nfv_tus","redhat:enterprise_linux_for_real_time_tus","redhat:virtualization","redhat:virtualization_host"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-3501","score":0.00377,"percentile":0.31736,"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."]}