OpenPrinting CUPS slow client can halt cupsd, leading to a possible DoS attack
Priority MEDIUM 58CWE-400Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 7 fixed, 3 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-400.
Summary
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to version 2.4.15, a client that connects to cupsd but sends slow messages, e.g. only one byte per second, delays cupsd as a whole, such that it becomes unusable by other clients. This issue has been patched in version 2.4.15.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00247 16th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial cups (OpenPrinting): 2.4.15Red Hat: 4 advisoriesRed Hat: 7 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| OpenPrinting | cups | before 2.4.15 | 2.4.15 | Patch available | CNA |
- cups VendorOpenPrinting Affected before 2.4.15 Fixed in 2.4.15 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openprinting:cups:*:*:*:*:*:*:*:* | before 2.4.15 | Vulnerable | OpenPrinting |
- cpe:2.3:a:openprinting:cups:*:*:*:*:*:*:*:* Versions before 2.4.15 Vulnerable ·OpenPrinting
Remediation
- Fix · CNA cups (OpenPrinting) Fixed in 2.4.15
Red Hat 4 advisories
- RHSA-2026:8814 Released 2026-04-17 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images cups-2.4.17-1.hum1@aarch64, cups-2.4.17-1.hum1@src, cups-2.4.17-1.hum1@x86_64 +14
- RHSA-2026:0596 Released 2026-01-14 · Red Hat rating Moderatecups security update
- Red Hat Enterprise Linux AppStream (v. 8) cups-1:2.2.6-66.el8_10
- Red Hat Enterprise Linux BaseOS (v. 8) cups-1:2.2.6-66.el8_10, cups-libs-1:2.2.6-66.el8_10
- RHSA-2026:0464 Released 2026-01-12 · Red Hat rating Moderatecups security update
- Red Hat Enterprise Linux AppStream (v. 10) cups-1:2.4.10-12.el10_1.2
- Red Hat Enterprise Linux BaseOS (v. 10) cups-1:2.4.10-12.el10_1.2, cups-libs-1:2.4.10-12.el10_1.2
Show 1 more Red Hat advisories
- RHSA-2026:0312 Released 2026-01-08 · Red Hat rating Moderatecups security update
- Red Hat Enterprise Linux AppStream (v. 9) cups-1:2.3.3op2-34.el9_7.2, cups-client-1:2.3.3op2-34.el9_7.2, cups-devel-1:2.3.3op2-34.el9_7.2 +4
- Red Hat Enterprise Linux BaseOS (v. 9) cups-1:2.3.3op2-34.el9_7.2, cups-libs-1:2.3.3op2-34.el9_7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat OpenShift Container Platform 4 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:0464 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2026:0596 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:0312 |
| Red Hat Enterprise Linux BaseOS (v. 10) | Fixed | RHSA-2026:0464 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2026:0596 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2026:0312 |
| Red Hat Hardened Images | Fixed | RHSA-2026:8814 |
Not affected: 6 products
- Red Hat Enterprise Linux AppStream (v. 10)
- Red Hat Enterprise Linux AppStream (v. 8)
- Red Hat Enterprise Linux AppStream (v. 9)
- Red Hat Enterprise Linux BaseOS (v. 10)
- Red Hat Enterprise Linux BaseOS (v. 8)
- Red Hat Enterprise Linux BaseOS (v. 9)
Timeline
- 2026-10-02 Threatist record created from CVE-2025-58436
References
More OpenPrinting Cups vulnerabilities
- TI-2025-35903 cups has Authentication bypass with AuthType Negotiate CVSS 3.1HIGH 8.0
- TI-2023-17077 CUPS vulnerable to use-after-free in cupsdAcceptClient() CVSS 3.1HIGH 7.1
- TI-2026-27200 Path traversal in OpenPrinting cups CVSS 3.1MEDIUM 6.5
- TI-2023-04157 OpenPrinting CUPS/libppd Postscript Parsing Heap Overflow CVSS 3.1HIGH 7.0
- TI-2026-74874 Path traversal in OpenPrinting CUPS banner handling discloses files CVSS 3.1MEDIUM 5.3
- TI-2026-27201 OpenPrinting CUPS: Heap overflow in `get_options()` CVSS 3.1MEDIUM 5.3
Sources
- CVE-2025-58436 · CVE Program
- CVE-2025-58436 · NVD
- FIRST EPSS
- CVE-2025-58436 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences