{"id":"CVE-2021-36144","aliases":["EUVD-2021-22776","GHSA-cqgc-44vw-w3h7"],"status":"published","title":"The polling timer handler in ACRN before 2.5 has a use-after-free for a freed virtio device,...","description":"The polling timer handler in ACRN before 2.5 has a use-after-free for a freed virtio device, related to devicemodel/hw/pci/virtio/*.c.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00961,"percentile":0.62052,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2021-07-02T21:24:57Z","modified":"2026-06-17T03:58:24Z","products":[{"vendor":"linux","product":"acrn"}],"references":[{"url":"https://github.com/projectacrn/acrn-hypervisor/pull/6268/commits/dd88504804e186029f845a166dc5c31695e2cca2","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36144"},{"url":"https://github.com/advisories/GHSA-cqgc-44vw-w3h7"}],"sources":{"cve":[{"id":"CVE-2021-36144","description":"The polling timer handler in ACRN before 2.5 has a use-after-free for a freed virtio device, related to devicemodel/hw/pci/virtio/*.c.","status":"published","published":"2021-07-02T21:24:57Z","modified":"2024-08-04T00:47:43.84Z","updated_at":"2026-11-02T14:33:06.32268Z"}],"euvd":[{"id":"EUVD-2021-22776","description":"The polling timer handler in ACRN before 2.5 has a use-after-free for a freed virtio device, related to devicemodel/hw/pci/virtio/*.c.","status":"published","published":"2021-07-02T21:24:57Z","modified":"2024-08-04T00:47:43Z","updated_at":"2026-11-03T03:24:29.877227Z"}],"ghsa":[{"id":"GHSA-cqgc-44vw-w3h7","title":"The polling timer handler in ACRN before 2.5 has a use-after-free for a freed virtio device,...","description":"The polling timer handler in ACRN before 2.5 has a use-after-free for a freed virtio device, related to devicemodel/hw/pci/virtio/*.c.","status":"published","published":"2022-05-24T19:06:54Z","modified":"2023-01-30T05:00:36Z","cwes":["CWE-416"],"updated_at":"2026-11-02T14:46:14.46933Z"}],"nvd":[{"id":"CVE-2021-36144","description":"The polling timer handler in ACRN before 2.5 has a use-after-free for a freed virtio device, related to devicemodel/hw/pci/virtio/*.c.","status":"published","published":"2021-07-02T22:15:08.867Z","modified":"2026-06-17T03:58:24.5Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:06:55.259633Z"}]}}