Vulnerability · Published Sep 9, 2026 · Assigned by redhat
CVE-2026-87875Cups: openprinting cups: heap out-of-bounds read in cupsutf32toutf8() via missing source-length bound
Medium 4.3
In plain English
A medium-severity out-of-bounds read in Red Hat Enterprise Linux 10 from Red Hat. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.4%top 66.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
The cupsUTF32ToUTF8() function in CUPS's cups/transcode.c lacks a source-length bound and can read past the end of the source buffer, resulting in a heap out-of-bounds read. This is reachable via SNMP supply-description parsing in backend/snmp-supplies.c with attacker-controlled content.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | cups | no fix listed | DEBIAN-CVE-2026-87875 |
| Debian:13 | cups | no fix listed | DEBIAN-CVE-2026-87875 |
| Debian:14 | cups | no fix listed | DEBIAN-CVE-2026-87875 |
| Ubuntu:22.04:LTS | cups | no fix listed | UBUNTU-CVE-2026-87875 |
| Ubuntu:24.04:LTS | cups | no fix listed | UBUNTU-CVE-2026-87875 |
| Ubuntu:26.04:LTS | cups | no fix listed | UBUNTU-CVE-2026-87875 |
| Ubuntu:26.10 | cups | no fix listed | UBUNTU-CVE-2026-87875 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Hardened Images | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- RHSA-2026:66600 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-87875 vdb-entry, x_refsource_REDHAT
- RHBZ#2530994 issue-tracking, x_refsource_REDHAT
- https://github.com/OpenPrinting/cups/commit/0c6842fc615e8afa284136a092da8178abf5f142
- https://github.com/OpenPrinting/cups/commit/2b1dc178a2d2325135b855142e384f4e8c42d8e4
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-559w-7676-3xrq