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CVE-2026-107888

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.

在 OpenPrinting CUPS 2.4.20 之前的版本中，存在一个空指针解引用漏洞，位于 函数中。当某个被标记为“创建时保留”（job-held-on-create）的作业引用了一个已被自动删除的临时打印机时，就会触发此问题。临时打印机清理机制可能在未取消其关联的保留作业的情况下删除目标打印机，而调度程序在检查“保留的新作业”时，会调用 并解引用其返回的 NULL 值。这将导致 cupsd 进程终止，并中断该进程所管理的所有打印队列。在某些可行的场景下，未经权限认证的用户即可触发此漏洞。

CVSS 5.1 · Medium
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I. Basic Information for CVE-2026-107888

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 in cupsdCheckJobs() when a job marked job-held-on-create refers to a temporary printer that has been automatically deleted. Temporary-printer cleanup can remove the destination without canceling its held jobs, and the scheduler dereferences the NULL result of cupsdFindDest() while checking holding_new_jobs. This terminates cupsd and interrupts all queues managed by that process. In some plausible scenarios, an unprivileged submission can trigger this.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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-2026-107888

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III. Intelligence Information for CVE-2026-107888

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Other References for CVE-2026-107888 (1)

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

CVE-2026-107885 3.3 LOW CUPS<=2.4.20资源耗尽漏洞
CVE-2026-107890 3.3 LOW CUPS漏洞：空指针解引用致服务崩溃
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-2026-107888

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