CVE-2016-7421 — Excessive Iteration in Qemu

CWE-834 — Excessive IterationCWE-835 — Infinite Loop9 documents7 sources
Severity
4.4MEDIUMNVD
OSV5.5
EPSS
0.1%
top 70.60%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
QemuDebian QemuDebian Linux
Timeline
PublishedDec 10
Latest updateMay 13

Description

The pvscsi_ring_pop_req_descr function in hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by leveraging failure to limit process IO loop to the ring size.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:HExploitability: 0.8 | Impact: 3.6

Affected Packages4 packages

▶debiandebian/qemu< qemu 1:2.7+dfsg-1 (bookworm)
▶Debianqemu/qemu< 1:2.7+dfsg-1+3
▶Ubuntuqemu/qemu< 2.0.0+dfsg-2ubuntu1.30+1
▶NVDqemu/qemu2.7.1

Also affects: Debian Linux 8.0

Patches

Patch: lists.gnu.org ↗Patch: lists.gnu.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-764p-pqfm-x2x7: The pvscsi_ring_pop_req_descr function in hw/scsi/vmw_pvscsi↗2022-05-13
▶
OSV
CVE-2016-7421: The pvscsi_ring_pop_req_descr function in hw/scsi/vmw_pvscsi↗2016-12-10
▶
OSV
qemu, qemu-kvm vulnerabilities↗2016-11-09
▶

📋Vendor Advisories

3
Ubuntu
QEMU vulnerabilities↗2016-11-09
▶
Red Hat
Qemu: scsi: pvscsi: infinite loop when processing IO requests↗2016-09-07
▶
Debian
CVE-2016-7421: qemu - The pvscsi_ring_pop_req_descr function in hw/scsi/vmw_pvscsi.c in QEMU (aka Quic...↗2016
▶

💬Community

2
Bugzilla
CVE-2016-7421 Qemu: scsi: pvscsi: infinite loop when processing IO requests↗2016-09-16
▶
Bugzilla
CVE-2016-7421 Qemu: scsi: pvscsi: infinite loop when processing IO requests [fedora-all]↗2016-09-16
▶