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CVE-2026-59679— SUSE libXfont2 缓冲区错误漏洞

一分钟漏洞结论

影响对象
SUSE Container suse/kiosk/tigervnc-x11vnc:1.14-63.8
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

SUSE libXfont2是德国SUSE公司的一款图形窗口系统字体处理库。 SUSE libXfont2 2.0.3-150000.3.6.1之前版本存在缓冲区错误漏洞，该漏洞源于libXfont2字体服务器客户端中的fs_read_glyphs()函数未交叉检查FS_QueryXBitmaps16回复中的num_chars与FS_QueryXExtents16回复中的num_extents，导致恶意字体服务器可触发攻击者控制的堆越界读取和写入。

CVSS 9.0 · Critical EPSS 0.26% · P17

影响版本矩阵 106

厂商产品 版本范围状态
libXfont2 libXfont2 ?≤ 2.0.8 affected
SUSE Container suse/kiosk/tigervnc-x11vnc:1.14-63.8 ?< 2.0.3-150000.3.6.1 affected
SUSE Container suse/kiosk/xorg:21.1-83.7 ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES-SAP-Azure ?< 2.0.7-160000.5.1 affected
SUSE Image SLES-SAP-Azure-3P ?< 2.0.7-160000.5.1 affected
SUSE Image SLES-SAP-BYOS-Azure ?< 2.0.7-160000.5.1 affected
SUSE Image SLES-SAP-BYOS-EC2 ?< 2.0.7-160000.5.1 affected
SUSE Image SLES-SAP-BYOS-GCE ?< 2.0.7-160000.5.1 affected
SUSE Image SLES-SAP-GCE ?< 2.0.7-160000.5.1 affected
SUSE Image SLES-SAP-GCE-3P ?< 2.0.7-160000.5.1 affected
SUSE Image SLES-SAPCAL-GCE ?< 2.0.7-160000.5.1 affected
SUSE Image SLES12-SP5-Azure-SAP-BYOS ?< 2.0.3-3.6.1 affected
SUSE Image SLES12-SP5-Azure-SAP-On-Demand ?< 2.0.3-3.6.1 affected
SUSE Image SLES12-SP5-EC2-SAP-BYOS ?< 2.0.3-3.6.1 affected
SUSE Image SLES12-SP5-EC2-SAP-On-Demand ?< 2.0.3-3.6.1 affected
SUSE Image SLES12-SP5-GCE-SAP-BYOS ?< 2.0.3-3.6.1 affected
SUSE Image SLES12-SP5-GCE-SAP-On-Demand ?< 2.0.3-3.6.1 affected
SUSE Image SLES15-SP6-SAP ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-Azure ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-Azure-3P ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-BYOS ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-BYOS-Azure ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-BYOS-EC2 ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-BYOS-GCE ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-EC2 ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-GCE ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-Hardened ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-Hardened-Azure ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-Hardened-BYOS ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-Hardened-BYOS-Azure ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-Hardened-BYOS-EC2 ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-Hardened-BYOS-GCE ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-Hardened-EC2 ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAP-Hardened-GCE ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAPCAL ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAPCAL-Azure ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAPCAL-EC2 ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP6-SAPCAL-GCE ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-Azure ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-Azure-3P ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-BYOS-Azure ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-BYOS-EC2 ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-BYOS-GCE ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-EC2 ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-GCE ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-GCE-3P ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-Hardened-Azure ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-Hardened-BYOS-Azure ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-Hardened-BYOS-EC2 ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-Hardened-BYOS-GCE ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAP-Hardened-GCE ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAPCAL-Azure ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAPCAL-EC2 ?< 2.0.3-150000.3.6.1 affected
SUSE Image SLES15-SP7-SAPCAL-GCE ?< 2.0.3-150000.3.6.1 affected
SUSE openSUSE Leap 16.0 ?< 2.0.7-160000.5.1 affected
?< 2.0.7-160000.5.1 affected
SUSE openSUSE Tumbleweed ?< 2.0.7-3.1 affected
?< 2.0.7-3.1 affected
?< 2.0.7-3.1 affected
?< 2.0.7-3.1 affected
SUSE SUSE Liberty Linux 10 ?< 2.0.6-5.el10_2.3 affected
?< 2.0.6-5.el10_2.3 affected
SUSE SUSE Liberty Linux 8 ?< 2.0.3-2.el8_10.3 affected
?< 2.0.3-2.el8_10.3 affected
SUSE SUSE Liberty Linux 9 ?< 2.0.3-12.el9_8.3 affected
?< 2.0.3-12.el9_8.3 affected
SUSE SUSE Linux Enterprise Desktop 15 SP7 ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise Module for Basesystem 15 SP7 ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise Server 12 SP5-LTSS ?< 2.0.3-3.6.1 affected
SUSE SUSE Linux Enterprise Server 15 SP4-LTSS ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise Server 15 SP5-LTSS ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise Server 15 SP6-LTSS ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise Server 15 SP7 ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise Server 16.0 ?< 2.0.7-160000.5.1 affected
?< 2.0.7-160000.5.1 affected
SUSE SUSE Linux Enterprise Server for SAP Applications 15 SP4 ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise Server for SAP Applications 15 SP5 ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise Server for SAP Applications 15 SP6 ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise Server for SAP Applications 15 SP7 ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Linux Enterprise Server for SAP applications 16.0 ?< 2.0.7-160000.5.1 affected
?< 2.0.7-160000.5.1 affected
SUSE SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 ?< 2.0.3-3.6.1 affected
SUSE SUSE Manager Proxy LTS 4.3 ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Manager Retail Branch Server LTS 4.3 ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
SUSE SUSE Manager Server LTS 4.3 ?< 2.0.3-150000.3.6.1 affected
?< 2.0.3-150000.3.6.1 affected
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一、 漏洞 CVE-2026-59679 基础信息

漏洞信息
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Vulnerability Title
fs_read_glyphs() heap OOB read/write via encoding array index mismatch in libXfont2
来源: CVE Program / CVE List V5
Vulnerability Description
fs_read_glyphs() in the libXfont2 font-server client (src/fc/fserve.c) indexes the per-character encoding[] array using num_chars from the FS_QueryXBitmaps16 reply, but that array was allocated with a size derived from num_extents in the separate FS_QueryXExtents16 reply. The two CARD32 fields are never cross-checked. A malicious or compromised font server can send a small num_extents (e.g. 1) in the extents reply, then a large num_chars (e.g. 100000) in the bitmaps reply. This causes attacker-controlled out-of-bounds heap read and writes.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
SUSE libXfont2 缓冲区错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
SUSE libXfont2是德国SUSE公司的一款图形窗口系统字体处理库。 SUSE libXfont2 2.0.3-150000.3.6.1之前版本存在缓冲区错误漏洞，该漏洞源于libXfont2字体服务器客户端中的fs_read_glyphs()函数未交叉检查FS_QueryXBitmaps16回复中的num_chars与FS_QueryXExtents16回复中的num_extents，导致恶意字体服务器可触发攻击者控制的堆越界读取和写入。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
SUSE Container suse/kiosk/tigervnc-x11vnc:1.14-63.8 ? ~ 2.0.3-150000.3.6.1 -
SUSE Container suse/kiosk/xorg:21.1-83.7 ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-Azure ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-Azure-3P ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-BYOS ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-BYOS-Azure ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-BYOS-EC2 ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-BYOS-GCE ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-EC2 ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-GCE ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-Hardened ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-Hardened-Azure ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-Hardened-BYOS ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-Hardened-BYOS-Azure ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-Hardened-BYOS-EC2 ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-Hardened-BYOS-GCE ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-Hardened-EC2 ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAP-Hardened-GCE ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAPCAL ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAPCAL-Azure ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAPCAL-EC2 ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP6-SAPCAL-GCE ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP7-SAP-Azure ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP7-SAP-Azure-3P ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP7-SAP-BYOS-Azure ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP7-SAP-BYOS-EC2 ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP7-SAP-BYOS-GCE ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP7-SAP-EC2 ? ~ 2.0.3-150000.3.6.1 -
SUSE Image SLES15-SP7-SAP-GCE ? ~ 2.0.3-150000.3.6.1 -

二、漏洞 CVE-2026-59679 的公开POC

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三、漏洞 CVE-2026-59679 的情报信息

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CVE-2026-59679 厂商安全公告 (1)

IV. Related Vulnerabilities

Same product: Container suse/kiosk/tigervnc-x11vnc:1.14-63.8
Same vendor: SUSE