PatchTheCVECVE-2026-39314: OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems
CVE-2026-39314 is a medium-severity flaw (CVSS 4.0) affecting cups. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- Public exploit reference
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.0 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 96%) |
| CISA exploited list | No |
| Weakness | CWE-191 |
| Published | 2026-04-07 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-39314?
cups: upgrade to newer than 2.4.16. Exact commands for each OS are on this page.
Is CVE-2026-39314 being exploited?
CVE-2026-39314 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-39314 affect?
CVE-2026-39314 affects cups. Severity is medium (CVSS 4.0). 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 us
How urgent is CVE-2026-39314?
Priority 25/100. Public exploit reference; On your watchlist
Related CVEs
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- CVE-2026-107885 LOW 3.3 UPGRADE OpenPrinting CUPS through 2.4.20 contains a resource-exhaustion vulnerability in the submission-timeout handli
- CVE-2026-107886 LOW 2.3 UPGRADE OpenPrinting CUPS before 2.4.20 contains a double-free in printer-class management
- CVE-2026-107888 MEDIUM 5.1 UPGRADE OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference in cupsdCheckJobs() when a job marked job-