CVE-2026-87875
Published: September 11, 2026Last modified: October 16, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 4.3 |
| Attack Vector | ADJACENT_NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | LOW |
| Integrity impact | NONE |
| Availability impact | NONE |
| Vector | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | cups | Fixed (2.4.20-r0) |
| 25 LTS | cups | Fixed (2.4.20-r0) | |
| Stream | cups | Fixed (2.4.20-r0) |
References
- https://access.redhat.com/errata/RHSA-2026:66600
- https://access.redhat.com/security/cve/CVE-2026-87875
- https://bugzilla.redhat.com/show_bug.cgi?id=2530994
- 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