CVE-2016-7907
Description
The imx_fec_do_tx function in hw/net/imx_fec.c in QEMU (aka Quick Emulator) does not properly limit the buffer descriptor count when transmitting packets, which allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 1:2.8+dfsg-3 |
| debian | bullseye | fixed | 1:2.8+dfsg-3 |
| debian | forky | fixed | 1:2.8+dfsg-3 |
| debian | sid | fixed | 1:2.8+dfsg-3 |
| debian | trixie | fixed | 1:2.8+dfsg-3 |
References
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
- http://www.openwall.com/lists/oss-security/2016/10/03/1
- http://www.openwall.com/lists/oss-security/2016/10/03/4
- http://www.securityfocus.com/bid/93274
- https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg05556.html
- https://security.gentoo.org/glsa/201611-11
- https://security-tracker.debian.org/tracker/CVE-2016-7907
CWEs
CWE-20 CWE-399
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.