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CVE-2026-39316

CUPS has a use-after-free in `cupsdDeleteTemporaryPrinters` via dangling subscription pointer

Published: Apr 7, 2026Updated: Apr 16, 2026 Sources: CVE List NVD BDUCWE-416
NVD MITRE
4.0CVSSMEDIUM
EPSS Score
0.2%
Top 92.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, a use-after-free vulnerability exists in the CUPS scheduler (cupsd) when temporary printers are automatically deleted. cupsdDeleteTemporaryPrinters() in scheduler/printers.c calls cupsdDeletePrinter() without first expiring subscriptions that reference the printer, leaving cupsd_subscription_t.dest as a dangling pointer to freed heap memory. The dangling pointer is subsequently dereferenced at multiple code sites, causing a crash (denial of service) of the cupsd daemon. With heap grooming, this can be leveraged for code execution.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-416

Affected Products

Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
Red Hat OpenShift Container PlatformRed Hat Inc.
SaaSSaaS Service
Cloud & SaaS / container-orchestration
АЛЬТ СП 10АО «ИВК»
On-premOS
Operating Systems / linux-distro
CUPSСообщество свободного программного обеспеченияOperating Systems / unix-bsd
red hat inc.commercialUSOperating Systemsaka red hat
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ао «ивк»commercialRUOperating Systemsaka ivk
and 3 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://access.redhat.com/security/cve/cve-2026-39316
access.redhat.com
https://security-tracker.debian.org/tracker/CVE-2026-39316
security-tracker.debian.org
https://github.com/OpenPrinting/cups/commit/0142eeb58e0d718b7d2e1f0d5dd214bd2192cc7f
github.com
and 2 more references View all →

Timeline

Published
Apr 7, 2026
Last Updated
Apr 16, 2026

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