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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Hardened Images | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | cups | 2.4.20-1 | — |
| Debian 13 | cups | No fix yet | — |
| Debian 12 | cups | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | cups | No fix yet | — |
| Ubuntu 26.04 LTS | cups | No fix yet | — |
| Ubuntu 24.04 LTS | cups | No fix yet | — |
| Ubuntu 22.04 LTS | cups | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | cups | No fix yet | — |
| Ubuntu Pro 18.04 LTS | cups | No fix yet | — |
| Ubuntu Pro 16.04 LTS | cups | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | cups +7 | 1:2.4.19-4.1.hum1 | RHSA-2026:66600 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | cups | 2.2.7-150000.3.96.1 | SUSE-SU-2026:4281-1 |
| SLES 12 SP5 | cups | 1.7.5-20.70.1 | SUSE-SU-2026:4216-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.1 | cups | 2.4.19-slfo.1.1_2.1 | SUSE-SU-2026:23925-1 |
| SLE Micro 6.0 | cups | 2.4.19-2.1 | SUSE-SU-2026:23877-1 |
| SLE Micro 5.5 | cups | 2.2.7-150000.3.96.1 | SUSE-SU-2026:4281-1 |
| SLE Micro 5.4 | cups | 2.2.7-150000.3.96.1 | SUSE-SU-2026:4281-1 |
| SLE Micro 5.3 | cups | 2.2.7-150000.3.96.1 | SUSE-SU-2026:4281-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | cups | 2.4.19-3.1 | openSUSE-SU-2026:11785-1 |
| openSUSE Leap 16.0 | cups | 2.4.19-160000.2.1 | openSUSE-SU-2026:21893-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | cups +7 | 1:2.4.20-1.amzn2023.0.1 | ALAS2023-2026-3415 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | cups | 2.4.19-2 | — |
Advisories 9
- RHSA-2026:66600 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- ALAS2023-2026-3415 Moderate: cups security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Nov 9, 2026
- WID-SEC-2026-3282 CUPS: Mehrere Schwachstellen ermöglichen Offenlegung von Informationen BSI CERT-Bund (WID) · Nov 3, 2026
- SUSE-SU-2026:23925-1 Security update for cups SUSE / openSUSE Security Updates · Sep 30, 2026
- SUSE-SU-2026:23877-1 Security update for cups SUSE / openSUSE Security Updates · Sep 28, 2026
- openSUSE-SU-2026:21893-1 Security update for cups SUSE / openSUSE Security Updates · Sep 25, 2026
- SUSE-SU-2026:4281-1 Security update for cups SUSE / openSUSE Security Updates · Sep 23, 2026
- SUSE-SU-2026:4216-1 Security update for cups SUSE / openSUSE Security Updates · Sep 17, 2026
- openSUSE-SU-2026:11785-1 cups-2.4.19-3.1 on GA media SUSE / openSUSE Security Updates · Sep 16, 2026
References
- RHSA-2026:66600 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-87875 vdb-entry
- RHBZ#2530994 issue-tracking
- 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