CVE-2026-39314
Reported by github_m · Published April 7, 2026
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| cups-ipptool | Amazon Linux | 1:2.4.16-1.amzn2023.0.3 |
| cups-lpd | Amazon Linux | 1:2.4.16-1.amzn2023.0.3 |
| cups | openprinting | 2.4.16 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| OpenPrinting | cups | <= 2.4.16 |
| amazon:2023 | cups-ipptool | 0 |
| amazon:2023 | cups-lpd | 0 |
| amazon:2023 | cups | 0 |
| amazon:2023 | cups-libs | 0 |
| amazon:2023 | cups-filesystem | 0 |
| amazon:2023 | cups-devel | 0 |
| amazon:2023 | cups-client | 0 |
| alpine | cups | 0 |
| OpenPrinting | cups | 0 |
| amazon:2023 | cups-printerapp | 0 |
Timeline
- Apr 7, 2026 CVE Published
- Apr 12, 2026 EPSS Score (24 in total, the first dated here)
- Jun 21, 2026 Coalition ESS Score
- Jun 23, 2026 CVE Updated
- Aug 11, 2026 Distribution Patch (2 in total, the first dated here)
- Aug 11, 2026 Security Advisory (5 in total, the first dated here)
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-39314
vulnetix vdb fixes CVE-2026-39314Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
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References
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-pp8w-2g52-7vj7 x_refsource_CONFIRM