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CVE-2026-107890

Quick assessment

Affected
OpenPrinting CUPS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenPrinting CUPS 2.4.20 之前的版本存在一个空指针解引用漏洞，该漏洞由作业创建请求中重复出现的 IPP 组标签引发。在 IPP 解析过程中，会创建带有 IPP_TAG_ZERO 标签的未命名分隔属性，但 函数会将这些分隔符转换为 IPP_TAG_JOB 类型。在作业启动阶段， 随后会对值为 NULL 的属性名称调用 ，从而导致 终止，并中断所有打印队列。当客户端能够访问调度程序，并向一个接受、已启用且支持所提交文档格式的队列提交作业时，一个精心构造的 Print-Job 请求即可触发此崩溃。

CVSS 3.3 · Low

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-107890

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference caused by repeated IPP group tags in job-creation requests. IPP parsing creates unnamed separator attributes with IPP_TAG_ZERO, but add_job() converts these separators to IPP_TAG_JOB. During job startup, get_options()/ipp_length() subsequently calls strlen() on a NULL attribute name, terminating cupsd and disrupting all queues. A single crafted Print-Job request can trigger the crash when the client can reach the scheduler and submit jobs to an accepting, enabled queue supporting the submitted document format. Anonymous submission is possible when permitted by listener and access-control configuration.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenPrinting CUPS 0 ~ 2.4.20 -

II. Public POCs for CVE-2026-107890

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-107890

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Other References for CVE-2026-107890 (1)

Same Patch Batch · OpenPrinting · 2026-10-09 · 4 CVEs total

CVE-2026-107888 5.1 MEDIUM CUPS<2.4.20空指针解引用致服务终止
CVE-2026-107885 3.3 LOW CUPS<=2.4.20资源耗尽漏洞
CVE-2026-107886 2.3 LOW CUPS<2.4.20双释放致拒绝服务

IV. Related Vulnerabilities

Same product: CUPS
Same vendor: OpenPrinting
Same weakness: CWE-476

V. Comments for CVE-2026-107890

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