A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.
References
Link | Resource |
---|---|
https://bugzilla.redhat.com/show_bug.cgi?id=1998514 | Issue Tracking Patch Third Party Advisory |
https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 | Patch Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html | Mailing List Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html | Mailing List Third Party Advisory |
https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html | Mailing List Patch Third Party Advisory |
https://security.gentoo.org/glsa/202208-27 | Third Party Advisory |
https://security.netapp.com/advisory/ntap-20220425-0004/ | Third Party Advisory |
https://ubuntu.com/security/CVE-2021-3748 | Patch Third Party Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: redhat
Published: 2022-03-23T19:46:40
Updated: 2022-09-05T05:06:41
Reserved: 2021-08-30T00:00:00
Link: CVE-2021-3748
JSON object: View
NVD Information
Status : Analyzed
Published: 2022-03-23T20:15:09.893
Modified: 2023-01-03T15:16:38.483
Link: CVE-2021-3748
JSON object: View
Redhat Information
No data.
CWE