OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference caused by repeated IPP group tags in job-creation requests. IPP parsing creates unnamed separator attributes with IPP_TAG_ZERO, but add_job() converts these separators to IPP_TAG_JOB. During job startup, get_options()/ipp_length() subsequently calls strlen() on a NULL attribute name, terminating cupsd and disrupting all queues. A single crafted Print-Job request can trigger the crash when the client can reach the scheduler and submit jobs to an accepting, enabled queue supporting the submitted document format. Anonymous submission is possible when permitted by listener and access-control configuration.

The CentOS Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS6:CLSA-2026:1791920953 advisory.

  - OpenPrinting CUPS through 2.4.20 contains a resource-exhaustion vulnerability in the submission-timeout     handling of cupsdCheckJobs(). The scheduler suppresses timeout processing for all pending jobs whenever     any client connection has an in-flight Send-Document operation, without matching that connection to the     job being examined. A client allowed to reach the IPP service can hold an incomplete HTTP request     containing parsed Send-Document headers before operation authorization, preventing unrelated incomplete     jobs from expiring. Where Create-Job submission is allowed, incomplete jobs can accumulate until MaxJobs     is exhausted and further legitimate print submissions are rejected. The suppression ends when the held     connection closes. (CVE-2026-107885)

  - OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference caused by repeated IPP group tags in     job-creation requests. IPP parsing creates unnamed separator attributes with IPP_TAG_ZERO, but add_job()     converts these separators to IPP_TAG_JOB. During job startup, get_options()/ipp_length() subsequently     calls strlen() on a NULL attribute name, terminating cupsd and disrupting all queues. A single crafted     Print-Job request can trigger the crash when the client can reach the scheduler and submit jobs to an     accepting, enabled queue supporting the submitted document format. Anonymous submission is possible when     permitted by listener and access-control configuration. (CVE-2026-107890)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS7:CLSA-2026:1792072476 advisory.

  - OpenPrinting CUPS through 2.4.20 contains a resource-exhaustion vulnerability in the submission-timeout     handling of cupsdCheckJobs(). The scheduler suppresses timeout processing for all pending jobs whenever     any client connection has an in-flight Send-Document operation, without matching that connection to the     job being examined. A client allowed to reach the IPP service can hold an incomplete HTTP request     containing parsed Send-Document headers before operation authorization, preventing unrelated incomplete     jobs from expiring. Where Create-Job submission is allowed, incomplete jobs can accumulate until MaxJobs     is exhausted and further legitimate print submissions are rejected. The suppression ends when the held     connection closes. (CVE-2026-107885)

  - OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference caused by repeated IPP group tags in     job-creation requests. IPP parsing creates unnamed separator attributes with IPP_TAG_ZERO, but add_job()     converts these separators to IPP_TAG_JOB. During job startup, get_options()/ipp_length() subsequently     calls strlen() on a NULL attribute name, terminating cupsd and disrupting all queues. A single crafted     Print-Job request can trigger the crash when the client can reach the scheduler and submit jobs to an     accepting, enabled queue supporting the submitted document format. Anonymous submission is possible when     permitted by listener and access-control configuration. (CVE-2026-107890)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference caused by repeated IPP group tags in
    job-creation requests. IPP parsing creates unnamed separator attributes with IPP_TAG_ZERO, but add_job()
    converts these separators to IPP_TAG_JOB. During job startup, get_options()/ipp_length() subsequently
    calls strlen() on a NULL attribute name, terminating cupsd and disrupting all queues. A single crafted
    Print-Job request can trigger the crash when the client can reach the scheduler and submit jobs to an
    accepting, enabled queue supporting the submitted document format. Anonymous submission is possible when
    permitted by listener and access-control configuration. (CVE-2026-107890)

The AlmaLinux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1791915424 advisory.

  - OpenPrinting CUPS through 2.4.20 contains a resource-exhaustion vulnerability in the submission-timeout     handling of cupsdCheckJobs(). The scheduler suppresses timeout processing for all pending jobs whenever     any client connection has an in-flight Send-Document operation, without matching that connection to the     job being examined. A client allowed to reach the IPP service can hold an incomplete HTTP request     containing parsed Send-Document headers before operation authorization, preventing unrelated incomplete     jobs from expiring. Where Create-Job submission is allowed, incomplete jobs can accumulate until MaxJobs     is exhausted and further legitimate print submissions are rejected. The suppression ends when the held     connection closes. (CVE-2026-107885)

  - OpenPrinting CUPS before 2.4.20 contains a double-free in printer-class management. When CUPS-Add-Modify-     Class replaces an existing class member list, add_class() frees pclass->printers without clearing the     pointer. If subsequent validation fails, the class retains the dangling pointer; CUPS-Delete-Class     subsequently frees the same allocation in cupsdDeletePrinter(). A client authorized to modify and delete     classes can cause scheduler-wide denial of service. The default policy requires @SYSTEM privileges.
    (CVE-2026-107886)

  - 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.
    (CVE-2026-107888)

  - OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference caused by repeated IPP group tags in     job-creation requests. IPP parsing creates unnamed separator attributes with IPP_TAG_ZERO, but add_job()     converts these separators to IPP_TAG_JOB. During job startup, get_options()/ipp_length() subsequently     calls strlen() on a NULL attribute name, terminating cupsd and disrupting all queues. A single crafted     Print-Job request can trigger the crash when the client can reach the scheduler and submit jobs to an     accepting, enabled queue supporting the submitted document format. Anonymous submission is possible when     permitted by listener and access-control configuration. (CVE-2026-107890)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference caused by repeated IPP group tags in     job-creation requests. IPP parsing creates unnamed separator attributes with IPP_TAG_ZERO, but add_job()     converts these separators to IPP_TAG_JOB. During job startup, get_options()/ipp_length() subsequently     calls strlen() on a NULL attribute name, terminating cupsd and disrupting all queues. A single crafted     Print-Job request can trigger the crash when the client can reach the scheduler and submit jobs to an     accepting, enabled queue supporting the submitted document format. Anonymous submission is possible when     permitted by listener and access-control configuration. (CVE-2026-107890)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
367915	CentOS Linux 6 [TuxCare] Security Update: cups / cups-devel / cups-libs / cups-lpd / cups-php Multiple Vulnerabilities (CENTOS6:CLSA-2026:1791920953)	Nessus	CentOS Local Security Checks	Local	medium
367178	CentOS Linux 7 [TuxCare] Security Update: cups / cups-client / cups-devel / cups-filesystem / cups-ipptool / etc Multiple Vulnerabilities (CENTOS7:CLSA-2026:1792072476)	Nessus	CentOS Local Security Checks	Local	medium
474771	Echo: cups: security update to 2.4.18-1+e4	Tenable Cloud Security	Echo Local Security Checks	Local	medium
474771	Echo: cups: security update to 2.4.18-1+e4	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
365356	AlmaLinux 9.2 [TuxCare] Security Update: cups / cups-client / cups-devel / cups-filesystem / cups-ipptool / etc Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1791915424)	Nessus	Alma Linux Local Security Checks	Local	medium
364395	Linux Distros Unpatched Vulnerability : CVE-2026-107890	Nessus	Misc.	Local	medium

Detections

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CVE-2026-107890

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium