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CVE-2023-6693

Qemu: virtio-net: stack buffer overflow in virtio_net_flush_tx()

Published: Jan 2, 2024Updated: Nov 3, 2025 Sources: CVE List NVD BDUCWE-121
4.9MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 75.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:HPR:NUI:NS:UC:LI:LA:L
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-121CWE-787

Affected Products

РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
АЛЬТ СП 10АО «ИВК»
On-premOS
Operating Systems / linux-distro
QEMUFabrice Bellard
Library
OSS Libraries / generic-library
ОСОН ОСнова ОnyxАО «НППКТ»
On-premOS
Operating Systems / linux-distro
ооо «ред софт»commercialRUOperating Systemsaka red soft
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
ао «ивк»commercialRUOperating Systemsaka ivk
fabrice bellardindividual-devFRCloud & SaaS
ао «нппкт»commercialRUOperating Systems
and 9 more affected products View all →

Exploitability

Official Patch Available
Workaround Available

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://gitlab.com/qemu-project/qemu/-/commit/e22f0603fb2fc274920a9e3a1d1306260b9a4cc4
gitlab.com
https://lists.nongnu.org/archive/html/qemu-devel/2024-01/msg00045.html
lists.nongnu.org
https://redos.red-soft.ru/support/secure/
redos.red-soft.ru
and 12 more references View all →

Timeline

Published
Jan 2, 2024
Last Updated
Nov 3, 2025

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