CVE-2024-7730: Qemu-kvm: virtio-snd: heap buffer overflow in virtio_snd_pcm_in_cb()
Vulnerability summary
CVE-2024-7730 is a high (CVSS 7.8) Heap-based Buffer Overflow vulnerability in qemu. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.8% of scored vulnerabilities.
Not severe (CVSS 7.4, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 14-11-2024PublishedVulnerability first disclosed.
- 14-11-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 4 sources · 1 version- CVE.orgCNA7.4HighCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.27%
Chance of exploitation in the next 30 days
Percentile
20%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.27% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- qemuAll versions (No fix recorded) | < 1:9.1.0+ds-1
Qemu1 product
- qemu< 9.1.0
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.47+esm4 | < 1:2.5+dfsg-5ubuntu10.51+esm3 | < 1:2.11+dfsg-1ubuntu7.42+esm2 | < 1:4.2-3ubuntu6.30 | < 1:6.2+dfsg-2ubuntu6.24 | < 1:8.2.2+ds-0ubuntu1.4
3 vendors · 3 products
