Qemu-kvm: virtio-snd: heap buffer overflow in virtio_snd_pcm_in_cb()

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.

Scores

EPSS (exploitation in 30 days)

0.27% · top 80% of all CVEs (7 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.

Weakness

• CWE-122: Heap-based Buffer Overflow (opens in a new tab)All about CWE-122 and its CVEs

Affected products

• qemu

  • affected < 9.1.0

• Red Hat · Red Hat Enterprise Linux 6

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 7

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 7

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 8

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 8 Advanced Virtualization

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 9

  All versions: unaffected

References (2)

• https://access.redhat.com/security/cve/CVE-2024-7730 (opens in a new tab)vdb-entryx_refsource_REDHAT
• RHBZ#2304289 (opens in a new tab)issue-trackingx_refsource_REDHAT

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2024-7730](https://trackcve.app/badge/CVE-2024-7730.svg)](https://trackcve.app/cve/CVE-2024-7730)

Record last updated 14 Nov 2024, 19:32 UTC.