{"id":"CVE-2021-3947","aliases":["ALPINE-CVE-2021-3947","AZL-8672","BELL-CVE-2021-3947","DEBIAN-CVE-2021-3947","EUVD-2021-27157","GHSA-435p-4r6f-2842","UBUNTU-CVE-2021-3947"],"status":"published","title":"A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in...","description":"A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in nvme_changed_nslist() where a malicious guest controlling certain input can read out of bounds memory. A malicious user could use this flaw leading to disclosure of sensitive information.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00317,"percentile":0.24842,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2022-02-18T17:50:50Z","modified":"2026-11-03T06:32:58Z","fixes":[{"ecosystem":"Alpine:v3.15","package":"qemu","fixed_in":["6.1.1-r0"],"sources":["osv"]},{"ecosystem":"Azure Linux:2","package":"qemu","fixed_in":["6.2.0-2"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"qemu","fixed_in":["1:6.2+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"qemu","fixed_in":["1:6.2+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"qemu","fixed_in":["1:6.2+dfsg-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"qemu","fixed_in":["1:6.2+dfsg-2ubuntu5"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.15","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.1.1-r0"}]}]},{"source":"osv","ecosystem":"Azure Linux:2","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.2.0-2"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.2+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.2+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.2+dfsg-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.2+dfsg-2ubuntu5"}]}],"versions":["1:6.0+dfsg-2expubuntu1","1:6.0+dfsg-2expubuntu2","1:6.0+dfsg-2expubuntu4"]}],"products":[{"vendor":"qemu","product":"qemu"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2021869","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","Vendor Advisory","fix"]},{"url":"https://security.netapp.com/advisory/ntap-20220318-0003/","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://security.gentoo.org/glsa/202208-27","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3947","tags":["web"]},{"url":"https://github.com/advisories/GHSA-435p-4r6f-2842"},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-3947","tags":["advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2021-3947","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-3947","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-3947","tags":["report"]},{"url":"https://lore.kernel.org/qemu-devel/20211111153125.2258176-1-philmd@redhat.com/","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-3947","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-3947","description":"A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in nvme_changed_nslist() where a malicious guest controlling certain input can read out of bounds memory. A malicious user could use this flaw leading to disclosure of sensitive information.","status":"published","published":"2022-02-18T17:50:50Z","modified":"2024-08-03T17:09:09.628Z","cwes":["CWE-125"],"updated_at":"2026-11-02T14:33:04.020035Z"}],"euvd":[{"id":"EUVD-2021-27157","description":"A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in nvme_changed_nslist() where a malicious guest controlling certain input can read out of bounds memory. A malicious user could use this flaw leading to disclosure of sensitive information.","status":"published","published":"2022-02-18T17:50:50Z","modified":"2024-08-03T17:09:09Z","updated_at":"2026-11-03T03:25:11.376657Z"}],"ghsa":[{"id":"GHSA-435p-4r6f-2842","title":"A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in...","description":"A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in nvme_changed_nslist() where a malicious guest controlling certain input can read out of bounds memory. A malicious user could use this flaw leading to disclosure of sensitive information.","status":"published","published":"2022-02-19T00:01:30Z","modified":"2023-01-27T05:00:53Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:41:46.4155Z"}],"nvd":[{"id":"CVE-2021-3947","description":"A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in nvme_changed_nslist() where a malicious guest controlling certain input can read out of bounds memory. A malicious user could use this flaw leading to disclosure of sensitive information.","status":"published","published":"2022-02-18T18:15:09.75Z","modified":"2026-06-17T04:06:16.567Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:07:04.6896Z"}],"osv":[{"id":"ALPINE-CVE-2021-3947","description":"A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in nvme_changed_nslist() where a malicious guest controlling certain input can read out of bounds memory. 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