CVE-2023-6693
published 2024-01-02CVE-2023-6693: 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…
PriorityP428medium5.3CVSS 3.1
AVLACLPRLUINSUCLILAL
EPSS
0.33%
25.1th percentile
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.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | qemu | < qemu 1:7.2+dfsg-7+deb12u4 (bookworm) | qemu 1:7.2+dfsg-7+deb12u4 (bookworm) |
| fedoraproject | fedora | — | — |
| msrc | azl3_qemu_8.2.0-13_on_azure_linux_3.0 | — | — |
| msrc | azl3_qemu_8.2.0-16_on_azure_linux_3.0 | — | — |
| msrc | cbl2_qemu_6.2.0-21_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_qemu_6.2.0-24_on_cbl_mariner_2.0 | — | — |
| qemu | qemu | < 8.2.1 | 8.2.1 |
| qemu | qemu | >= 0 < 1:5.2+dfsg-11+deb11u4 | 1:5.2+dfsg-11+deb11u4 |
| qemu | qemu | >= 0 < 1:7.2+dfsg-7+deb12u4 | 1:7.2+dfsg-7+deb12u4 |
| qemu | qemu | >= 0 < 1:8.2.0+ds-3 | 1:8.2.0+ds-3 |
| qemu | qemu | >= 0 < 1:8.2.0+ds-3 | 1:8.2.0+ds-3 |
| qemu | qemu | >= 0 < 1:6.2+dfsg-2ubuntu6.22 | 1:6.2+dfsg-2ubuntu6.22 |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
osv6.5MEDIUM
vendor_ubuntu6.5MEDIUM
vendor_debian4.9MEDIUM
vendor_msrc4.9MEDIUM
vendor_redhat4.9MEDIUM
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OSV
qemu vulnerabilities
osv·2024-08-13·CVSS 6.5
CVE-2023-6683 [MEDIUM] qemu vulnerabilities
qemu vulnerabilities
Markus Frank and Fiona Ebner discovered that QEMU did not properly
handle certain memory operations, leading to a NULL pointer dereference.
An authenticated user could potentially use this issue to cause a denial
of service. (CVE-2023-6683)
Xiao Lei discovered that QEMU did not properly handle certain memory
operations when specific features were enabled, which could lead to a
stack overflow. An attacker could potentially use this issue to leak
sensitive information. (CVE-2023-6693)
It was discovered that QEMU had an integer underflow vulnerability in
the TI command, which would result in a buffer overflow. An attacker
could potentially use this issue to cause a denial of service.
(CVE-2024-24474)
GHSA
GHSA-835p-c6x8-xh5f: A stack based buffer overflow was found in the virtio-net device of QEMU
ghsa_unreviewed·2024-01-02
CVE-2023-6693 [MEDIUM] CWE-121 GHSA-835p-c6x8-xh5f: A stack based buffer overflow was found in the virtio-net device of QEMU
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.
OSV
CVE-2023-6693: A stack based buffer overflow was found in the virtio-net device of QEMU
osv·2024-01-02·CVSS 5.3
CVE-2023-6693 [MEDIUM] CVE-2023-6693: A stack based buffer overflow was found in the virtio-net device of QEMU
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.
Ubuntu
QEMU vulnerabilities
vendor_ubuntu·2024-08-13·CVSS 6.5
CVE-2023-6693 [MEDIUM] QEMU vulnerabilities
Title: QEMU vulnerabilities
Summary: Several security issues were fixed in QEMU.
Markus Frank and Fiona Ebner discovered that QEMU did not properly
handle certain memory operations, leading to a NULL pointer dereference.
An authenticated user could potentially use this issue to cause a denial
of service. (CVE-2023-6683)
Xiao Lei discovered that QEMU did not properly handle certain memory
operations when specific features were enabled, which could lead to a
stack overflow. An attacker could potentially use this issue to leak
sensitive information. (CVE-2023-6693)
It was discovered that QEMU had an integer underflow vulnerability in
the TI command, which would result in a buffer overflow. An attacker
could potentially use this issue to cause a denial of service.
(CVE-2024-24474)
Instruc
Microsoft
Qemu: virtio-net: stack buffer overflow in virtio_net_flush_tx()
vendor_msrc·2024-01-09·CVSS 4.9
CVE-2023-6693 [MEDIUM] CWE-121 Qemu: virtio-net: stack buffer overflow in virtio_net_flush_tx()
Qemu: virtio-net: stack buffer overflow in virtio_net_flush_tx()
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
redhat: redhat
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: ht
Red Hat
QEMU: virtio-net: stack buffer overflow in virtio_net_flush_tx()
vendor_redhat·2024-01-02·CVSS 4.9
CVE-2023-6693 [MEDIUM] CWE-121 QEMU: virtio-net: stack buffer overflow in virtio_net_flush_tx()
QEMU: virtio-net: stack buffer overflow in virtio_net_flush_tx()
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.
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 al
Debian
CVE-2023-6693: qemu - A stack based buffer overflow was found in the virtio-net device of QEMU. This i...
vendor_debian·2023·CVSS 4.9
CVE-2023-6693 [MEDIUM] CVE-2023-6693: qemu - A stack based buffer overflow was found in the virtio-net device of QEMU. This i...
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.
Scope: local
bookworm: resolved (fixed in 1:7.2+dfsg-7+deb12u4)
bullseye: resolved (fixed in 1:5.2+dfsg-11+deb11u4)
forky: resolved (fixed in 1:8.2.0+ds-3)
sid: resolved (fixed in 1:8.2.0+ds-3)
trixie: resolved (fixed in 1:8.2.0+ds-3)
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://access.redhat.com/errata/RHSA-2024:2962https://access.redhat.com/errata/RHSA-2025:4492https://access.redhat.com/security/cve/CVE-2023-6693https://bugzilla.redhat.com/show_bug.cgi?id=2254580https://access.redhat.com/errata/RHSA-2024:2962https://access.redhat.com/security/cve/CVE-2023-6693https://bugzilla.redhat.com/show_bug.cgi?id=2254580https://lists.debian.org/debian-lts-announce/2025/04/msg00042.htmlhttps://lists.fedoraproject.org/archives/list/[email protected]/message/OYGUN5HVOXESW7MSNM44E4AE2VNXQB6Y/https://security.netapp.com/advisory/ntap-20240208-0004/
2024-01-02
Published