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.
Fixes

Solution

No solution given by the vendor.


Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

History

Wed, 21 May 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 06 May 2025 15:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:9

Tue, 06 May 2025 08:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:9 cpe:/a:redhat:enterprise_linux:9::appstream
References

Fri, 22 Nov 2024 12:00:00 +0000


Sat, 14 Sep 2024 00:45:00 +0000


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-09-26T06:27:26.577Z

Reserved: 2023-12-11T17:20:44.491Z

Link: CVE-2023-6693

cve-icon Vulnrichment

Updated: 2024-08-02T08:35:14.892Z

cve-icon NVD

Status : Modified

Published: 2024-01-02T10:15:08.930

Modified: 2025-05-06T09:15:16.097

Link: CVE-2023-6693

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-01-02T00:00:00Z

Links: CVE-2023-6693 - Bugzilla

cve-icon OpenCVE Enrichment

No data.