CVE-2016-9603
A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could…
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.
Timeline
ID reserved
By redhat
- 20 months later
· 20 months later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.0 | Medium5.5 | CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L |
| NVDNVD · Modified | 3.0 | Critical9.9 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 4.4% · top 8.5% of all CVEs (8 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
References (18)
- 96893 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- RHSA-2017:0983 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:0982 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- [debian-lts-announce] 20180906 [SECURITY] [DLA 1497-1] qemu security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- GLSA-201706-03 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- RHSA-2017:1206 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 1038023 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://support.citrix.com/article/CTX221578 (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2017:0985 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:0987 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:0984 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- [debian-lts-announce] 20180206 [SECURITY] [DLA 1270-1] xen security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- RHSA-2017:0988 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:1441 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9603 (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2017:0981 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:0980 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:1205 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-9603)Record last updated .