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Fencer Vulns
medium 5.1

CVE-2026-107888 json

OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference in cupsdCheckJobs() when a job marked job-held-on-create refers to a te…

published 2026-10-09 31 d ago modified 2026-10-20 19 d ago also EUVD-2026-95476

cvss
5.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference in cupsdCheckJobs() when a job marked job-held-on-create refers to a temporary printer that has been automatically deleted. Temporary-printer cleanup can remove the destination without canceling its held jobs, and the scheduler dereferences the NULL result of cupsdFindDest() while checking holding_new_jobs. This terminates cupsd and interrupts all queues managed by that process. In some plausible scenarios, an unprivileged submission can trigger this.

Patch / fix

  • OpenPrinting CUPS 2.4.20
  • cups hummingbird 1 2.4.19-4.5.hum1
  • cups-lpd hummingbird 1 2.4.19-4.5.hum1
  • cups-libs hummingbird 1 2.4.19-4.5.hum1
  • cups-client hummingbird 1 2.4.19-4.5.hum1
  • cups-ipptool hummingbird 1 2.4.19-4.5.hum1
  • cups-filesystem hummingbird 1 2.4.19-4.5.hum1
  • cups-printerapp hummingbird 1 2.4.19-4.5.hum1

red hat advisories RHSA-2026:81410

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-107888 updated cvss 5.1

cups: CUPS: Denial of Service via deleted temporary printer

  • Red Hat Enterprise Linux 6 cups, cups-lpd, cups-php, cups-libs
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 cups, cups-lpd, cups-libs, cups-client, cups-ipptool, cups-filesystem Red Hat Enterprise Linux 8 cups, cups-lpd, cups-libs, cups-client, cups-ipptool, cups-filesystem Red Hat Enterprise Linux 9 cups, cups-lpd, cups-libs, cups-client, cups-ipptool, cups-filesystem, +1 more Red Hat Enterprise Linux 10 cups
    affected: no fix available “Fix deferred”
  • Red Hat Hardened Images cups 2.4.19-4.5.hum1, cups-lpd 2.4.19-4.5.hum1, cups-libs 2.4.19-4.5.hum1, cups-client 2.4.19-4.5.hum1, cups-ipptool 2.4.19-4.5.hum1, cups-filesystem 2.4.19-4.5.hum1, +1 more
    fixed: vendor fix RHSA-2026:81410

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
24 d ago

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/OpenPrinting/cups/security/advisories/GHSA-qqm8-4q5h-jg55 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.1 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • OpenPrinting CUPS

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.