CVE-2024-8612

NameCVE-2024-8612
DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1082406

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qemu (PTS)jessie, jessie (lts)1:2.1+dfsg-12+deb8u23vulnerable
stretch (security)1:2.8+dfsg-6+deb9u17vulnerable
stretch (lts), stretch1:2.8+dfsg-6+deb9u19vulnerable
buster (security), buster, buster (lts)1:3.1+dfsg-8+deb10u12vulnerable
bullseye1:5.2+dfsg-11+deb11u3vulnerable
bullseye (security)1:5.2+dfsg-11+deb11u2vulnerable
bookworm1:7.2+dfsg-7+deb12u7vulnerable
sid, trixie1:9.1.1+ds-2vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusourcejessie(unfixed)end-of-life
qemusource(unstable)(unfixed)1082406

Notes

[bookworm] - qemu <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2313760
Mitigation addressing symptomps (but not root issue): https://gitlab.com/qemu-project/qemu/-/commit/637b0aa139565cb82a7b9269e62214f87082635c
qemu/1:9.1.1+ds-1 upload only addresses the symtoms but not the root cause of the issue.
Discussion on proper fix: https://lore.kernel.org/qemu-devel/20240926040912-mutt-send-email-mst@kernel.org/

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