CVE-2026-39314— CUPS has an integer underflow in `_ppdCreateFromIPP` causes root cupsd crash via negative `job-password-supported`
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-39314
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
CUPS has an integer underflow in `_ppdCreateFromIPP` causes root cupsd crash via negative `job-password-supported`
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, an integer underflow vulnerability in _ppdCreateFromIPP() (cups/ppd-cache.c) allows any unprivileged local user to crash the cupsd root process by supplying a negative job-password-supported IPP attribute. The bounds check only caps the upper bound, so a negative value passes validation, is cast to size_t (wrapping to ~2^64), and is used as the length argument to memset() on a 33-byte stack buffer. This causes an immediate SIGSEGV in the cupsd root process. Combined with systemd's Restart=on-failure, an attacker can repeat the crash for sustained denial of service.
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
整数下溢(超界折返)
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenPrinting CUPS 数字错误漏洞
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及之前版本存在数字错误漏洞，该漏洞源于_ppdCreateFromIPP函数存在整数下溢，可能导致拒绝服务攻击。
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-2026-39314
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-39314
请登录查看更多情报信息。
IV. Related Vulnerabilities
Same product: cups
- CVE-2026-41079
OpenPrinting CUPS: Heap out-of-bounds read in SNMP supply-le - CVE-2026-39316
CUPS has a use-after-free in `cupsdDeleteTemporaryPrinters` - 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-2026-39316
CUPS has a use-after-free in `cupsdDeleteTemporaryPrinters` - 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 weakness: CWE-191
- CVE-2026-7736
osrg GoBGP mrt.go parseRibEntry integer underflow - CVE-2026-33845
Gnutls: gnutls: denial of service via dtls zero-length fragm - CVE-2026-7424
Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Pl - CVE-2026-7423
Integer Underflow in ICMP Echo Reply Processing in FreeRTOS- - CVE-2026-6914
MD5 checksum creation may cause availability loss
V. Comments for CVE-2026-39314
No comments yet