What’s Vulnerable › Vulnerabilities

CVE-2024-8612: Qemu-kvm: information leak in virtio devices

• Severity: low (CVSS 3.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-20 · updated 2026-06-17
• Weakness: CWE-200

Description

A flaw was found in QEMU, in the virtio-scsi, virtio-blk, and virtio-crypto devices. The size for virtqueue_push as set in virtio_scsi_complete_req / virtio_blk_req_complete / virito_crypto_req_complete could be larger than the true size of the data which has been sent to guest. Once virtqueue_push() finally calls dma_memory_unmap to ummap the in_iov, it may call the address_space_write function to write back the data. Some uninitialized data may exist in the bounce.buffer, leading to an information leak.

Affected products

• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 8 Advanced Virtualization: all versions
• Red Hat Enterprise Linux 9: all versions

References

• https://access.redhat.com/security/cve/CVE-2024-8612
• https://bugzilla.redhat.com/show_bug.cgi?id=2313760
• https://gitlab.com/qemu-project/qemu/-/commit/637b0aa139565cb82a7b9269e62214f87082635c
• https://security.netapp.com/advisory/ntap-20241108-0006/

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