The LZW decompressor in (1) the BufCompressedFill function in fontfile/decompress.c in X.Org libXfont before 1.4.4 and (2) compress/compress.c in 4.3BSD, as used in zopen.c in OpenBSD before 3.8, FreeBSD, NetBSD 4.0.x and 5.0.x before 5.0.3 and 5.1.x before 5.1.1, FreeType 2.1.9, and other products, does not properly handle code words that are absent from the decompression table when encountered, which allows context-dependent attackers to trigger an infinite loop or a heap-based buffer overflow, and possibly execute arbitrary code, via a crafted compressed stream, a related issue to CVE-2006-1168 and CVE-2011-2896.
結論預警: CVE-2011-2895 綜合評估為高風險（71.5/100）：CVSS 技術影響為嚴重級，利用機率偏高（EPSS 8.36%，百分位 94%） 核心證據: EPSS 顯示該漏洞近期被利用的可能性處於高位。 近一日 EPSS 上升 +1.34%，被利用關注度持續升高。 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 | 2026-06-15 | 7.02% | 8.36% | +1.34% |
| 2 | 2026-02-05 | 7.20% | 7.02% | -0.18% |
| 3 | 2026-01-23 | — | 7.20% | — |
完整 EPSS 歷史 （共 18 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 |
|---|---|---|---|---|---|---|
| 9.3 | 2.0 | HIGH |
|
8.6 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2011-2895 not yet assigned priority: Debian including 1 source packages (libxfont), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2011-2895 |
gentoo
|
high | CVE-2011-2895: 1 GLSA(s) (201402-23), 1 atom(s) (x11-libs/libXfont); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-2895 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2011-2895 |
ubuntu
|
medium | CVE-2011-2895 medium priority: Ubuntu including 1 source packages (libxfont), 5 status rows across 5 suites (hardy, lucid, maverick, natty, upstream): released 4, ignored 1. | https://ubuntu.com/security/CVE-2011-2895 |
| 廠商 | 產品 | 版本 | 原始 CPE |
|---|---|---|---|
| freetype | freetype | 2.1.9 | cpe:2.3:a:freetype:freetype:2.1.9:*:*:*:*:*:*:* |
| x | libxfont | <= 1.4.3 | cpe:2.3:a:x:libxfont:*:*:*:*:*:*:*:* |
| x | libxfont | 1.2.0 | cpe:2.3:a:x:libxfont:1.2.0:*:*:*:*:*:*:* |
| x | libxfont | 1.2.1 | cpe:2.3:a:x:libxfont:1.2.1:*:*:*:*:*:*:* |
| x | libxfont | 1.2.2 | cpe:2.3:a:x:libxfont:1.2.2:*:*:*:*:*:*:* |
| x | libxfont | 1.2.3 | cpe:2.3:a:x:libxfont:1.2.3:*:*:*:*:*:*:* |
| x | libxfont | 1.2.4 | cpe:2.3:a:x:libxfont:1.2.4:*:*:*:*:*:*:* |
| x | libxfont | 1.2.5 | cpe:2.3:a:x:libxfont:1.2.5:*:*:*:*:*:*:* |
| x | libxfont | 1.2.6 | cpe:2.3:a:x:libxfont:1.2.6:*:*:*:*:*:*:* |
| x | libxfont | 1.2.7 | cpe:2.3:a:x:libxfont:1.2.7:*:*:*:*:*:*:* |
| x | libxfont | 1.2.8 | cpe:2.3:a:x:libxfont:1.2.8:*:*:*:*:*:*:* |
| x | libxfont | 1.2.9 | cpe:2.3:a:x:libxfont:1.2.9:*:*:*:*:*:*:* |
| x | libxfont | 1.3.0 | cpe:2.3:a:x:libxfont:1.3.0:*:*:*:*:*:*:* |
| x | libxfont | 1.3.1 | cpe:2.3:a:x:libxfont:1.3.1:*:*:*:*:*:*:* |
| x | libxfont | 1.3.2 | cpe:2.3:a:x:libxfont:1.3.2:*:*:*:*:*:*:* |
| x | libxfont | 1.3.3 | cpe:2.3:a:x:libxfont:1.3.3:*:*:*:*:*:*:* |
| x | libxfont | 1.3.4 | cpe:2.3:a:x:libxfont:1.3.4:*:*:*:*:*:*:* |
| x | libxfont | 1.4.0 | cpe:2.3:a:x:libxfont:1.4.0:*:*:*:*:*:*:* |
| x | libxfont | 1.4.1 | cpe:2.3:a:x:libxfont:1.4.1:*:*:*:*:*:*:* |
| x | libxfont | 1.4.2 | cpe:2.3:a:x:libxfont:1.4.2:*:*:*:*:*:*:* |
| freebsd | freebsd | — | cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* |
| netbsd | netbsd | — | cpe:2.3:o:netbsd:netbsd:*:*:*:*:*:*:*:* |
| openbsd | openbsd | <= 3.7 | cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:* |
| openbsd | openbsd | 2.0 | cpe:2.3:o:openbsd:openbsd:2.0:*:*:*:*:*:*:* |
| openbsd | openbsd | 2.1 | cpe:2.3:o:openbsd:openbsd:2.1:*:*:*:*:*:*:* |
| openbsd | openbsd | 2.2 | cpe:2.3:o:openbsd:openbsd:2.2:*:*:*:*:*:*:* |
| openbsd | openbsd | 2.3 | cpe:2.3:o:openbsd:openbsd:2.3:*:*:*:*:*:*:* |
| openbsd | openbsd | 2.4 | cpe:2.3:o:openbsd:openbsd:2.4:*:*:*:*:*:*:* |
| openbsd | openbsd | 2.5 | cpe:2.3:o:openbsd:openbsd:2.5:*:*:*:*:*:*:* |
| openbsd | openbsd | 2.6 | cpe:2.3:o:openbsd:openbsd:2.6:*:*:*:*:*:*:* |
| openbsd | openbsd | 2.7 | cpe:2.3:o:openbsd:openbsd:2.7:*:*:*:*:*:*:* |
| openbsd | openbsd | 2.8 | cpe:2.3:o:openbsd:openbsd:2.8:*:*:*:*:*:*:* |
| openbsd | openbsd | 2.9 | cpe:2.3:o:openbsd:openbsd:2.9:*:*:*:*:*:*:* |
| openbsd | openbsd | 3.0 | cpe:2.3:o:openbsd:openbsd:3.0:*:*:*:*:*:*:* |
| openbsd | openbsd | 3.1 | cpe:2.3:o:openbsd:openbsd:3.1:*:*:*:*:*:*:* |
| openbsd | openbsd | 3.2 | cpe:2.3:o:openbsd:openbsd:3.2:*:*:*:*:*:*:* |
| openbsd | openbsd | 3.3 | cpe:2.3:o:openbsd:openbsd:3.3:*:*:*:*:*:*:* |
| openbsd | openbsd | 3.4 | cpe:2.3:o:openbsd:openbsd:3.4:*:*:*:*:*:*:* |
| openbsd | openbsd | 3.5 | cpe:2.3:o:openbsd:openbsd:3.5:*:*:*:*:*:*:* |
| openbsd | openbsd | 3.6 | cpe:2.3:o:openbsd:openbsd:3.6:*:*:*:*:*:*:* |