CVE-2024-7730 | Qemu-kvm: virtio-snd: heap buffer overflow in virtio_snd_pcm_in_cb()

A heap buffer overflow was found in the virtio-snd device in QEMU. When reading input audio in the virtio-snd input callback, virtio_snd_pcm_in_cb, the function did not check whether the iov can fit the data buffer. This issue can trigger an out-of-bounds write if the size of the virtio queue element is equal to virtio_snd_pcm_status, which makes the available space for audio data zero.

Published: 2024-11-14 Last update: 2025-08-05 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-7730 is rated Low Risk (37.1/100): CVSS High severity, with low exploitation likelihood (EPSS 0.29%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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

Exploit prediction scoring system (EPSS) score for CVE-2024-7730

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 2026-06-15 0.03% 0.29% +0.27%
2 2025-12-20 0.12% 0.03% -0.10%
3 2025-11-21 — 0.12% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-7730

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.4 3.1 HIGH
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.4 5.9 [email protected]
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]

Weakness enumeration for CVE-2024-7730

OS Trackers for CVE-2024-7730

vendor priority summary link
alpine — CVE-2024-7730: 1 source package rows (qemu); 77 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 77. https://security.alpinelinux.org/vuln/CVE-2024-7730
debian not yet assigned CVE-2024-7730 not yet assigned priority: Debian including 1 source packages (qemu), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. https://security-tracker.debian.org/tracker/CVE-2024-7730
redhat high — https://access.redhat.com/security/cve/CVE-2024-7730
suse medium CVE-2024-7730 severity moderate: SUSE including 60 source package names (qemu, qemu-SLOF, …), 1126 product×package rows across 46 product lines (SUSE Linux Enterprise High Performance Computing 12 SP5, SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS, … (46 product lines)): Known Not Affected 1001, Will Not Fix 125. https://www.suse.com/security/cve/CVE-2024-7730/
ubuntu medium CVE-2024-7730 medium priority: Ubuntu including 1 source packages (qemu), 10 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): released 10. https://ubuntu.com/security/CVE-2024-7730

Affected software / configurations for CVE-2024-7730

Vendor Product Version Raw CPE
qemu qemu < 9.1.0 cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*

References for CVE-2024-7730

URL Tags
https://access.redhat.com/security/cve/CVE-2024-7730 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2304289 Issue Tracking Third Party Advisory
cvelogic Threat Intelligence