Cups: openprinting cups: heap out-of-bounds read in cupsutf32toutf8() via missing source-length bound
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.3epss 0.4%
exploitation probability
0.4%top 69% of all CVEs
observed exploitation
nono source reports it
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:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
Red Hat · Red Hat Enterprise Linux 10Red Hat · Red Hat Enterprise Linux 6Red Hat · Red Hat Enterprise Linux 7Red Hat · Red Hat Enterprise Linux 8Red Hat · Red Hat Enterprise Linux 9Red Hat · Red Hat Hardened ImagesRed Hat · Red Hat OpenShift Container Platform 4References
https://access.redhat.com/errata/RHSA-2026:66600https://access.redhat.com/security/cve/CVE-2026-87875https://bugzilla.redhat.com/show_bug.cgi?id=2530994https://github.com/OpenPrinting/cups/commit/0c6842fc615e8afa284136a092da8178abf5f142https://github.com/OpenPrinting/cups/commit/2b1dc178a2d2325135b855142e384f4e8c42d8e4https://github.com/OpenPrinting/cups/security/advisories/GHSA-559w-7676-3xrq