VulnerabilityModified
CVE-2023-6693
A stack based buffer overflow was found in the virtio-net device of QEMU.
MEDIUM 5.3EPSS 0.33%
Does this matter?
Lower severity and a low EPSS score (0.33%). Track it; it rarely justifies an emergency change on its own.
Description
A stack based buffer overflow was found in the virtio-net device of QEMU. This issue occurs when flushing TX in the virtio_net_flush_tx function if guest features VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 and VIRTIO_NET_F_MRG_RXBUF are enabled. This could allow a malicious user to overwrite local variables allocated on the stack. Specifically, the `out_sg` variable could be used to read a part of process memory and send it to the wire, causing an information leak.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- EPSS
- 0.33% probability · 26th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-121, CWE-787
- Affected
- qemu/qemu · redhat/enterprise linux · fedoraproject/fedora
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2024:2962
- https://access.redhat.com/errata/RHSA-2025:4492
- https://access.redhat.com/security/cve/CVE-2023-6693Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2254580Issue Tracking, Patch
- https://access.redhat.com/errata/RHSA-2024:2962
- https://access.redhat.com/security/cve/CVE-2023-6693Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2254580Issue Tracking, Patch
- https://lists.debian.org/debian-lts-announce/2025/04/msg00042.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OYGUN5HVOXESW7MSNM44E4AE2VNXQB6Y/
- https://security.netapp.com/advisory/ntap-20240208-0004/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.