Integer signedness error in the dynamicGetbuf function in gd_io_dp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP before 5.6.28 and 7.x before 7.0.13, allows remote attackers to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact via a crafted imagecreatefromstring call.
結論預警: CVE-2016-8670 綜合評估為高風險（71/100）：CVSS 技術影響為嚴重級，利用機率偏高（EPSS 4.79%，百分位 91%） 核心證據: EPSS 顯示該漏洞近期被利用的可能性處於高位。 強制指令: 被利用機率偏高—請盤點暴露面並優先安排修補。
風險隨態勢動態變化；本站持續評估並同步更新本頁展示內容。
EPSS 日更估計相對被利用可能性；百分位表示該 CVE 在已評分漏洞中的相對排名（越高表示相對更嚴重）。
| # | 日期 | 舊 EPSS 分數 | 新 EPSS 分數 | 變化（新 − 舊） |
|---|---|---|---|---|
| 1 | 2026-06-30 | 4.75% | 4.79% | +0.04% |
| 2 | 2026-06-19 | 4.79% | 4.75% | -0.04% |
| 3 | 2026-06-15 | — | 4.79% | — |
完整 EPSS 歷史 （共 13 筆）
該 CVE 的 CVSS 指標。
| 底座分 | 版本 | 嚴重度 | 向量 | 可利用性 | 影響 | 分數來源 |
|---|---|---|---|---|---|---|
| 9.8 | 3.0 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2016-8670 not yet assigned priority: Debian including 1 source packages (libgd2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2016-8670 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2016-8670 |
suse
|
medium | CVE-2016-8670 severity moderate: SUSE including 222 source package names (apache2-mod_php5-5.2.14-0.7.30.97.1, apache2-mod_php5-5.5.14-83.1, …), 336 product×package rows across 34 product lines (Container caasp/v4/nginx-ingress-controller, Image SLES12-SP5-Azure-SAP-BYOS, … (34 product lines)): Fixed 336. | https://www.suse.com/security/cve/CVE-2016-8670/ |
ubuntu
|
medium | CVE-2016-8670 medium priority: Ubuntu including 3 source packages (libgd2, php5, php7.0), 15 status rows across 5 suites (precise, trusty, upstream, xenial, yakkety): DNE 4, not-affected 4, released 4, needs-triage 3. | https://ubuntu.com/security/CVE-2016-8670 |
| URL | 標籤 |
|---|---|
| http://www.debian.org/security/2016/dsa-3693 | |
| http://www.openwall.com/lists/oss-security/2016/10/15/1 | Third Party Advisory |
| http://www.php.net/ChangeLog-5.php | Release Notes Vendor Advisory |
| http://www.php.net/ChangeLog-7.php | Release Notes Vendor Advisory |
| http://www.securityfocus.com/bid/93594 | |
| https://bugs.php.net/bug.php?id=73280 | Vendor Advisory |
| https://github.com/libgd/libgd/commit/53110871935244816bbb9d131da0bccff734bfe9 | Vendor Advisory |
| https://support.f5.com/csp/article/K21336065?utm_source=f5support&%3Butm_medium=RSS |