CVE-2026-55480
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems.
Published Oct 15, 2026 · updated Oct 15, 2026 · OpenPrinting cups
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/ .ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a symlink before the root open, while a privileged add-printer or modify-printer operation using a model PPD triggers copy_model(). The reporter treats an existing lp foothold and the privileged operation as distinct prerequisites, while the maintainer assesses high privileges because installing the relevant filter or administering the printer requires root or print-administrator access. If the race succeeds, the root scheduler follows the symlink and truncates or overwrites a root-writable target with generated PPD data, compromising file integrity or availability. This issue is fixed in version 2.4.20.
Code
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Timeline
Detection, updates, and resolution for this record.
Oct 15, 2026 · NIST NVD
Detected
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/ .ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a sy
Oct 15, 2026 · OSV.dev
Updated
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/ .ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a sy
Affected
- Debian:12 cups2.4.10-1, 2.4.10-2, 2.4.10-3
- Debian:13 cups2.4.10-3, 2.4.10-3+deb13u1, 2.4.10-3+deb13u2
- Debian:14 cups2.4.10-3, 2.4.10-4, 2.4.14-1
- vendor OpenPrinting cupsversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-55480
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/ .ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Expl
cve.org - NIST NVDVulnerability recordCVE-2026-55480
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/ .ppd path in an lp-group-writable directory and opens it as root without O_EXCL o
nvd.nist.gov - OSV.devPackage advisoryDEBIAN-CVE-2026-55480osv.dev