How severe is CVE-2007-5729?

CVE-2007-5729 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-2007-5729 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-5729?

CVE-2007-5729 primarily affects Qemu. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-5729?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2007-5729 published?

CVE-2007-5729 was published on 2007-10-30 and last updated on 2026-06-16.

CVE-2007-5729

CVE-2007-5729 is a high-severity vulnerability in Qemu with a CVSS 2.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 2.0 base score 7.2)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Qemu
Published: 2007-10-30
Last modified: 2026-06-16

Description

The NE2000 emulator in QEMU 0.8.2 allows local users to execute arbitrary code by writing Ethernet frames with a size larger than the MTU to the EN0_TCNT register, which triggers a heap-based buffer overflow in the slirp library, aka NE2000 "mtu" heap overflow. NOTE: some sources have used CVE-2007-1321 to refer to this issue as part of "NE2000 network driver and the socket code," but this is the correct identifier for the mtu overflow vulnerability.

Frequently asked questions

What is CVE-2007-5729?: The NE2000 emulator in QEMU 0.8.2 allows local users to execute arbitrary code by writing Ethernet frames with a size larger than the MTU to the EN0_TCNT register, which triggers a heap-based buffer overflow in the slirp library, aka NE2000 "mtu" heap overflow. NOTE: some sources have used CVE-2007-1321 to refer to this issue as part of "NE2000 network driver and the socket code," but this is the correct identifier for the mtu overflow vulnerability.
How severe is CVE-2007-5729?: CVE-2007-5729 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-2007-5729 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-5729?: CVE-2007-5729 primarily affects Qemu. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-5729?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2007-5729 published?: CVE-2007-5729 was published on 2007-10-30 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:qemu:qemu:0.8.2:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:3.1:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:4.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:11.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:11.1:*:*:*:*:*:*:*

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