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.
総合評価: CVE-2016-9603 は中リスク（57.4/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 4.45%、90 パーセンタイル） 根拠: EPSS 上、短期間での悪用可能性は高い水準です。 直近 1 日で EPSS が +3.86% 上昇。悪用への関心が高まっている可能性があります。 推奨対応: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.59% | 4.45% | +3.86% |
| 2 | 2026-05-17 | 1.59% | 0.59% | -1.00% |
| 3 | 2026-02-10 | — | 1.59% | — |
EPSS の全履歴 （全 15 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 5.5 | 3.0 | MEDIUM |
|
1.3 | 3.7 | [email protected] |
| 9.9 | 3.0 | CRITICAL |
|
3.1 | 6.0 | [email protected] |
| 9.0 | 2.0 | HIGH |
|
8.0 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2016-9603: 1 source package rows (xen); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0. | https://security.alpinelinux.org/vuln/CVE-2016-9603 |
debian
|
not yet assigned | CVE-2016-9603 not yet assigned priority: Debian including 2 source packages (qemu, xen), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 10. | https://security-tracker.debian.org/tracker/CVE-2016-9603 |
gentoo
|
normal | CVE-2016-9603: 1 GLSA(s) (201706-03), 1 atom(s) (app-emulation/qemu); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-9603 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2016-9603 |
suse
|
low | CVE-2016-9603 severity low: SUSE including 112 source package names (kvm-1.4.2-53.11.1, kvm-1.4.2-60.3.1, …), 276 product×package rows across 33 product lines (SUSE Liberty Linux 7, SUSE Linux Enterprise Desktop 12 SP1, … (33 product lines)): Fixed 230, Known Not Affected 46. | https://www.suse.com/security/cve/CVE-2016-9603/ |
ubuntu
|
medium | CVE-2016-9603 medium priority: Ubuntu including 3 source packages (qemu, qemu-kvm, xen), 18 status rows across 6 suites (precise, trusty, upstream, xenial, yakkety, zesty): DNE 5, released 5, not-affected 4, needs-triage 2, ignored 1, needed 1. | https://ubuntu.com/security/CVE-2016-9603 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| qemu | qemu | < 2.9.0 | cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* |
| citrix | xenserver | 6.0.2 | cpe:2.3:a:citrix:xenserver:6.0.2:*:*:*:*:*:*:* |
| citrix | xenserver | 6.2.0 | cpe:2.3:a:citrix:xenserver:6.2.0:sp1:*:*:*:*:*:* |
| citrix | xenserver | 6.5 | cpe:2.3:a:citrix:xenserver:6.5:sp1:*:*:*:*:*:* |
| citrix | xenserver | 7.0 | cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:* |
| citrix | xenserver | 7.1 | cpe:2.3:a:citrix:xenserver:7.1:*:*:*:*:*:*:* |
| redhat | openstack | 5.0 | cpe:2.3:a:redhat:openstack:5.0:*:*:*:*:*:*:* |
| redhat | openstack | 6.0 | cpe:2.3:a:redhat:openstack:6.0:*:*:*:*:*:*:* |
| redhat | openstack | 7.0 | cpe:2.3:a:redhat:openstack:7.0:*:*:*:*:*:*:* |
| redhat | openstack | 8 | cpe:2.3:a:redhat:openstack:8:*:*:*:*:*:*:* |
| redhat | openstack | 9 | cpe:2.3:a:redhat:openstack:9:*:*:*:*:*:*:* |
| redhat | openstack | 10 | cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:* |
| debian | debian_linux | 7.0 | cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 6.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 7.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 6.0 | cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 7.0 | cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.3 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.4 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_eus | 7.3 | cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_eus | 7.4 | cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_eus | 7.5 | cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 6.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 7.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* |