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.
Problem types
Exposure of Sensitive Information to an Unauthorized Actor
Product status
Timeline
| 2024-09-20: | Reported to Red Hat. |
| 2024-09-20: | Made public. |
Credits
Red Hat would like to thank Xiao Lei (FSL team), Yiming Tao (FSL team), and Yongkang Jia (FSL team) for reporting this issue.
References
security.netapp.com/advisory/ntap-20241108-0006/
access.redhat.com/security/cve/CVE-2024-8612
bugzilla.redhat.com/show_bug.cgi?id=2313760 (RHBZ#2313760)
gitlab.com/...ommit/637b0aa139565cb82a7b9269e62214f87082635c
