Medium severity · published Sep 9, 2026
CVE-2026-87875
Cups: openprinting cups: heap out-of-bounds read in cupsutf32toutf8() via missing source-length bound
4.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 6 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 7 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Hardened Images · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4 · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-87875
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-87875
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:66600
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-87875
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2530994
github.com
https://github.com/OpenPrinting/cups/commit/0c6842fc615e8afa284136a092da8178abf5f142
github.com
https://github.com/OpenPrinting/cups/commit/2b1dc178a2d2325135b855142e384f4e8c42d8e4
github.com
https://github.com/OpenPrinting/cups/security/advisories/GHSA-559w-7676-3xrq
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