CVE-2016-7907: qemu Improper Input Validation
Vulnerability summary
CVE-2016-7907 is a medium (CVSS 4.4) Improper Input Validation vulnerability in qemu. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 35.2% of scored vulnerabilities.
Not severe (CVSS 4.4, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 3 · Related 3Timeline
- 05-10-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated4.4MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated4.4MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.41%
Chance of exploitation in the next 30 days
Percentile
35%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.41% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-399Resource Management ErrorsWeaknesses in this category are related to improper management of system resources.
Affected systems
Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- qemu< 1:2.8+dfsg-3
Qemu1 product
- qemu≤ 2.8.1.1 | 2.9.0:rc0 | 2.9.0:rc1 | 2.9.0:rc2 | 2.9.0:rc3 | 2.9.0:rc4 | 2.9.0:rc5
Ubuntu1 product
- qemu< 1:2.5+dfsg-5ubuntu10.11
3 vendors · 3 products
References
10 links- lists.opensuse.org/opensuse-updates/2016-12/msg00140.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.gnu.org/archive/html/qemu-devel/2016-09/msg05556.htmlMailing ListX Refsource MLISTPatchVendor AdvisoryREPORT
