CVE-2026-63320

Public on 2026-09-01
Modified on 2026-09-11
Description
Host-side AddressSanitizer heap-buffer-overflow READ in current QEMU master through the virtio-net-pci receive filtering path on q35. The crash is in receive_filter().
Severity
Medium severity
Medium
See what this means
CVSS v3 Base Score
5.3
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Core qemu Pending Fix
Amazon Linux 2023 qemu Pending Fix
Amazon Linux 2027 Preview qemu Not Affected
Amazon Linux 2 - Core qemu-guest-agent Not Affected
Amazon Linux 2 - Core qemu-kvm Not Affected

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-63320 Mitre: CVE-2026-63320