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.
CVSS Details
- CVSS 3.1 Base Score: 4
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade cups | Apr 29, 2026 | Apr 7, 2026 |
| Amazon_linux_2023 | — | Upgrade cups-client-debuginfoUpgrade cups-printerappUpgrade cupsUpgrade cups-libs-debuginfoUpgrade cups-develUpgrade cups-filesystemUpgrade cups-lpd-debuginfoUpgrade cups-lpdUpgrade cups-debuginfoUpgrade cups-debugsourceUpgrade cups-ipptoolUpgrade cups-libsUpgrade cups-printerapp-debuginfoUpgrade cups-ipptool-debuginfoUpgrade cups-client | May 4, 2026 | Apr 7, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Apr 7, 2026 |
| Ubuntu | — | Upgrade cups-daemonUpgrade cups | Jun 9, 2026 | Jun 8, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Apr 7, 2026 |
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