A privilege escalation vulnerability was found in CUPS when used with the cups-filters serial backend. A local user who is a member of the lpadmin group can configure a printer that uses a privileged serial backend. The CUPS scheduler does not restrict the path component of non-file device URIs, so the root-privileged backend can write attacker-controlled print data to an arbitrary file. This can be used to change security-sensitive CUPS configuration and ultimately achieve root code execution. Exploitation requires local lpadmin group membership and a serial backend binary installed with root-only permissions.
This CVE has been withdrawn by MITRE
MITRE marked CVE-2026-95511 as REJECTED on . It is no longer considered a valid vulnerability record. The original content below is preserved for historical reference only.
Reason given by MITRE
Not a vulnerability. Creating a serial queue that overwrites cups-files.conf requires membership in SystemGroups (lpadmin), which is an opt-in cupsd admin role granted by a superuser. No privilege boundary is crossed.
CVE-2026-95511
✕ Withdrawn — historical dataHIGHPre-NVD 8.2
8.2CVSS
- CVSS v3
- 8.2
- EchelonGraph score
- Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
- EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- —Not applicable: this CVE ID was withdrawn
Published
September 22, 2026
Last Modified
September 22, 2026
References (3)
- secalert@redhathttps://access.redhat.com/security/cve/CVE-2026-95511
- secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=2537749
- secalert@redhat · CISA-ADPhttps://github.com/v12-security/pocs/tree/main/cups/cups2root
Frequently asked(4)
What is CVE-2026-95511?
CVE-2026-95511 is a rejected CVE ID: its record was withdrawn on September 22, 2026 and no longer describes a vulnerability. Reason given: Not a vulnerability. Creating a serial queue that overwrites cups-files.conf requires membership in SystemGroups (lpadmin), which is an opt-in cupsd admin role granted by a superuser. No privilege boundary is crossed.
When was the CVE record for CVE-2026-95511 published?
The CVE record for CVE-2026-95511 was published on September 22, 2026. EchelonGraph's copy of the record carries a last-modified date of September 22, 2026; the record at its source may have been updated since.
What is the CVSS score of CVE-2026-95511?
CVE-2026-95511 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-95511?
There is nothing to remediate under CVE-2026-95511: it is a rejected (withdrawn) CVE ID and no longer describes a vulnerability.