The hb_buffer_ensure function in hb-buffer.c in HarfBuzz, as used in Pango 1.28.3, Firefox, and other products, does not verify that memory reallocations succeed, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) or possibly execute arbitrary code via crafted OpenType font data that triggers use of an incorrect index.
结论预警: CVE-2011-0064 综合评估为中等风险（57.9/100）：CVSS 技术影响为中级，利用概率（EPSS 3.33%） 强制指令: 梳理受影响资产并纳入修补计划。
风险随态势动态变化；本站持续评估并同步更新本页展示内容。
EPSS 日更估计相对被利用可能性；百分位表示该 CVE 在已评分漏洞中的相对排名（越高表示相对更严重）。
| # | 日期 | 旧 EPSS 分数 | 新 EPSS 分数 | 变化（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 3.09% | 3.33% | +0.24% |
| 2 | 2025-09-06 | 2.56% | 3.09% | +0.53% |
| 3 | 2025-03-30 | — | 2.56% | — |
完整 EPSS 历史 （共 12 条）
该 CVE 的 CVSS 指标。
| 底座分 | 版本 | 严重度 | 向量 | 可利用性 | 影响 | 分数来源 |
|---|---|---|---|---|---|---|
| 6.8 | 2.0 | MEDIUM |
|
8.6 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2011-0064 not yet assigned priority: Debian including 1 source packages (pango1.0), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2011-0064 |
gentoo
|
normal | CVE-2011-0064: 1 GLSA(s) (201405-13), 1 atom(s) (x11-libs/pango); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-0064 |
redhat
|
critical | — | https://access.redhat.com/security/cve/CVE-2011-0064 |
suse
|
medium | CVE-2011-0064 severity moderate: SUSE including 43 source package names (libpango-1_0-0-1.36.3-4.14, libpango-1_0-0-1.36.3-4.2, …), 97 product×package rows across 34 product lines (SUSE Linux Enterprise Desktop 12, SUSE Linux Enterprise Desktop 12 SP1, … (34 product lines)): Fixed 97. | https://www.suse.com/security/cve/CVE-2011-0064/ |
ubuntu
|
medium | CVE-2011-0064 medium priority: Ubuntu including 1 source packages (pango1.0), 6 status rows across 6 suites (dapper, hardy, karmic, lucid, maverick, upstream): released 3, ignored 1, needs-triage 1, not-affected 1. | https://ubuntu.com/security/CVE-2011-0064 |
: Per: http://cwe.mitre.org/data/definitions/476.html 'CWE-476: NULL Pointer Dereference'