Out-of-bounds Read in Red Hat Enterprise Linux 10
CVE-2026-87875
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-87875 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- github.com/OpenPrinting/cups/security/advisories/GHSA-559w-7676-3xrq
- github.com/OpenPrinting/cups/commit/0c6842fc615e8afa284136a092da8178abf5f142
- github.com/OpenPrinting/cups/commit/2b1dc178a2d2325135b855142e384f4e8c42d8e4
- access.redhat.com/errata/RHSA-2026:66600 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-87875?
- CVE-2026-87875 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Out-of-bounds Read. CVSS score: 4.3/10. Published 2026-09-09.
- How severe is CVE-2026-87875?
- Medium severity. CVSS v3 base score is 4.3 out of 10.