CVE-2024-3447 | Qemu: sdhci: heap buffer overflow in sdhci_write_dataport()

Exp

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.

Published: 2024-11-14 Last update: 2026-05-12 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-3447 is rated Exploit Available (50/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.01%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2024-3447

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-3447

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.07% 0.01% -0.06%
2 2025-11-18 0.03% 0.07% +0.05%
3 2025-06-03 — 0.03% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-3447

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.0 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.5 4.0 [email protected]

Weakness enumeration for CVE-2024-3447

GitHub Security Advisory for CVE-2024-3447

GHSA-mq5w-grf9-5rp9 · Severity: medium — A heap-based buffer overflow was found in the SDHCI device emulation of QEMU. The bug is...

OS Trackers for CVE-2024-3447

vendor priority summary link
debian not yet assigned CVE-2024-3447 not yet assigned priority: Debian including 1 source packages (qemu), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-3447
redhat medium — https://access.redhat.com/security/cve/CVE-2024-3447
suse medium CVE-2024-3447 severity moderate: SUSE including 657 source package names (2.0.2-2.2.115:qemu-guest-agent-7.1.0-150500.49.15.1, 2.1.1-3.34:qemu-guest-agent-8.2.5-1.1, …), 1264 product×package rows across 46 product lines (Container suse/sl-micro/6.0/kvm-os-container, Container suse/sle-micro-rancher/5.2, … (46 product lines)): Fixed 951, Known Affected 231, Known Not Affected 82. https://www.suse.com/security/cve/CVE-2024-3447/
ubuntu medium CVE-2024-3447 medium priority: Ubuntu including 1 source packages (qemu), 11 status rows across 11 suites (bionic, focal, jammy, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): released 6, ignored 3, needs-triage 2. https://ubuntu.com/security/CVE-2024-3447

Affected software / configurations for CVE-2024-3447

Vendor Product Version Raw CPE
qemu qemu < 7.2.11 cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
qemu qemu >= 8.0.0, < 8.2.3 cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
qemu qemu 9.0.0 cpe:2.3:a:qemu:qemu:9.0.0:-:*:*:*:*:*:*
qemu qemu 9.0.0 cpe:2.3:a:qemu:qemu:9.0.0:rc0:*:*:*:*:*:*
qemu qemu 9.0.0 cpe:2.3:a:qemu:qemu:9.0.0:rc1:*:*:*:*:*:*
qemu qemu 9.0.0 cpe:2.3:a:qemu:qemu:9.0.0:rc2:*:*:*:*:*:*
netapp hci_compute_node — cpe:2.3:o:netapp:hci_compute_node:-:*:*:*:*:*:*:*

References for CVE-2024-3447

cvelogic Threat Intelligence