CVE-2024-3447: qemu Heap Overflow — Exploit & Fix

Description

A heap-based buffer overflow was found in the SDHCI device emulation of QEMU. The bug is triggered when both `s->data_count` and the size of `s->fifo_buffer` are set to 0x200, leading to an out-of-bound access. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.

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CVSS v3.1 Score

6.0

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

Weakness Type (CWE)

CWE-122 CWE-122

Affected Products

Vendor	Product	Versions
qemu	qemu	< 7.2.11
qemu	qemu	8.0.0 — 8.2.3
qemu	qemu	All
qemu	qemu	All
qemu	qemu	All
qemu	qemu	All
netapp	hci_compute_node	All

References

Advisories & Patches

https://security.netapp.com/advisory/ntap-20250425-0005/

Exploits

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=58813

Other References

https://access.redhat.com/security/cve/CVE-2024-3447 https://bugzilla.redhat.com/show_bug.cgi?id=2274123 https://patchew.org/QEMU/[email protected]/ https://lists.debian.org/debian-lts-announce/2025/04/msg00042.html https://cert-portal.siemens.com/productcert/html/ssa-577017.html

Frequently Asked Questions

What is CVE-2024-3447? +

A heap-based buffer overflow was found in the SDHCI device emulation of QEMU. The bug is triggered when both `s->data_count` and the size of `s->fifo_buffer` are set to 0x200, leading to an out-of-bound access. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition. It has a CVSS v3.1 base score of 6.0 (MEDIUM).

How severe is CVE-2024-3447? +

CVE-2024-3447 has a CVSS v3.1 score of 6.0 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-3447? +

CVE-2024-3447 affects products from netapp, qemu, specifically: hci_compute_node, qemu. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-3447? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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