CVE-2026-39316— CUPS has a use-after-free in `cupsdDeleteTemporaryPrinters` via dangling subscription pointer
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I. Basic Information for CVE-2026-39316
Vulnerability Information
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Vulnerability Title
CUPS has a use-after-free in `cupsdDeleteTemporaryPrinters` via dangling subscription pointer
Source: NVD (National Vulnerability Database)
Vulnerability Description
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, a use-after-free vulnerability exists in the CUPS scheduler (cupsd) when temporary printers are automatically deleted. cupsdDeleteTemporaryPrinters() in scheduler/printers.c calls cupsdDeletePrinter() without first expiring subscriptions that reference the printer, leaving cupsd_subscription_t.dest as a dangling pointer to freed heap memory. The dangling pointer is subsequently dereferenced at multiple code sites, causing a crash (denial of service) of the cupsd daemon. With heap grooming, this can be leveraged for code execution.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
释放后使用
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenPrinting CUPS 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenPrinting CUPS是OpenPrinting公司的一个适用于 Linux® 和其他类 Unix® 操作系统的基于标准的开源打印系统。 OpenPrinting CUPS 2.4.16及之前版本存在资源管理错误漏洞，该漏洞源于自动删除临时打印机时存在释放后重用问题，可能导致拒绝服务或代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| OpenPrinting | cups | <= 2.4.16 | - |
II. Public POCs for CVE-2026-39316
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: cups
- CVE-2026-41079
OpenPrinting CUPS: Heap out-of-bounds read in SNMP supply-le - CVE-2026-39314
CUPS has an integer underflow in `_ppdCreateFromIPP` causes - CVE-2026-34980
OpenPrinting CUPS: Shared PostScript queue lets anonymous Pr - CVE-2026-34979
OpenPrinting CUPS: Heap overflow in `get_options()` - CVE-2026-34978
OpenPrinting CUPS: Path traversal in RSS notify-recipient-ur
Same vendor: OpenPrinting
- CVE-2026-41079
OpenPrinting CUPS: Heap out-of-bounds read in SNMP supply-le - CVE-2026-39314
CUPS has an integer underflow in `_ppdCreateFromIPP` causes - CVE-2026-34980
OpenPrinting CUPS: Shared PostScript queue lets anonymous Pr - CVE-2026-34979
OpenPrinting CUPS: Heap overflow in `get_options()` - CVE-2026-34978
OpenPrinting CUPS: Path traversal in RSS notify-recipient-ur
V. Comments for CVE-2026-39316
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