Vulnerability-Lookup

RHSA-2026:66600

Vulnerability from csaf_redhat - Published: 2026-09-11 14:29 - Updated: 2026-09-11 23:55

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Moderate

Notes

Topic: An update for Red Hat Hardened Images RPMs is now available.

Details: This update includes the following RPMs: cups: * cups-2.4.19-4.1.hum1 (aarch64, x86_64) * cups-client-2.4.19-4.1.hum1 (aarch64, x86_64) * cups-devel-2.4.19-4.1.hum1 (aarch64, x86_64) * cups-filesystem-2.4.19-4.1.hum1 (noarch) * cups-ipptool-2.4.19-4.1.hum1 (aarch64, x86_64) * cups-libs-2.4.19-4.1.hum1 (aarch64, x86_64) * cups-lpd-2.4.19-4.1.hum1 (aarch64, x86_64) * cups-printerapp-2.4.19-4.1.hum1 (aarch64, x86_64) * cups-2.4.19-4.1.hum1.src (src)

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

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.

4.3 (Medium)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE-125 - Out-of-bounds Read

Affected products

Fixed 4 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:cups-main@aarch64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:cups-main@noarch	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:cups-main@src	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:cups-main@x86_64	—	Vendor Fix fix Workaround

Threats

Impact Moderate

References

12 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:66600	self
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2026-87875	external
https://access.redhat.com/security/updates/classi…	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-87875	self
https://bugzilla.redhat.com/show_bug.cgi?id=2530994	external
https://www.cve.org/CVERecord?id=CVE-2026-87875	external
https://nvd.nist.gov/vuln/detail/CVE-2026-87875	external
https://github.com/OpenPrinting/cups/commit/0c684…	external
https://github.com/OpenPrinting/cups/commit/2b1dc…	external
https://github.com/OpenPrinting/cups/security/adv…	external

Acknowledgments

Independent Security Researcher pant0m

JSON

To clipboard

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          "organization": "Independent Security Researcher"
        }
      ],
      "cve": "CVE-2026-87875",
      "cwe": {
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        "name": "Out-of-bounds Read"
      },
      "discovery_date": "2026-08-01T00:00:00+00:00",
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        }
      ],
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          "text": "The cupsUTF32ToUTF8() function in CUPS\u0027s 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.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "cups: OpenPrinting CUPS: Heap out-of-bounds read in cupsUTF32ToUTF8() via missing source-length bound",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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        }
      ],
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        },
        {
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        },
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        },
        {
          "category": "external",
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          "url": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-559w-7676-3xrq"
        }
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      "release_date": "2026-09-09T00:00:00+00:00",
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          "category": "vendor_fix",
          "date": "2026-09-11T14:29:38+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:cups-main@aarch64",
            "Red Hat Hardened Images:cups-main@noarch",
            "Red Hat Hardened Images:cups-main@src",
            "Red Hat Hardened Images:cups-main@x86_64"
          ],
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            "category": "none"
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        },
        {
          "category": "workaround",
          "details": "Fixed on upstream master branch with commit 0c6842f and for versions 2.4.x with commit 2b1dc17.",
          "product_ids": [
            "Red Hat Hardened Images:cups-main@aarch64",
            "Red Hat Hardened Images:cups-main@noarch",
            "Red Hat Hardened Images:cups-main@src",
            "Red Hat Hardened Images:cups-main@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:cups-main@aarch64",
            "Red Hat Hardened Images:cups-main@noarch",
            "Red Hat Hardened Images:cups-main@src",
            "Red Hat Hardened Images:cups-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "cups: OpenPrinting CUPS: Heap out-of-bounds read in cupsUTF32ToUTF8() via missing source-length bound"
    }
  ]
}

CVE-2026-87875 (GCVE-0-2026-87875)

Vulnerability from cvelistv5 – Published: 2026-09-09 16:06 – Updated: 2026-09-11 23:55

Title

Cups: openprinting cups: heap out-of-bounds read in cupsutf32toutf8() via missing source-length bound

Summary

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-09 17:57 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

redhat redhat root

References

6 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:66600	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-87875	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2530994	issue-trackingx_refsource_REDHAT
https://github.com/OpenPrinting/cups/commit/0c684…
https://github.com/OpenPrinting/cups/commit/2b1dc…
https://github.com/OpenPrinting/cups/security/adv…

Impacted products

7 products

Vendor	Product	Version
Red Hat	Red Hat Hardened Images	Unaffected: 2.4.19-4.1.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-09-09 00:00

Credits

Red Hat would like to thank pant0m (Independent Security Researcher) for reporting this issue.

Show details on NVD website

JSON

To clipboard

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          "value": "The cupsUTF32ToUTF8() function in CUPS\u0027s 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."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
              "value": "Moderate"
            },
            "type": "Red Hat severity rating"
          }
        },
        {
          "cvssV3_1": {
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            "attackVector": "ADJACENT_NETWORK",
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            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
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        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-11T23:55:37.452Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
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          "url": "https://access.redhat.com/errata/RHSA-2026:66600"
        },
        {
          "tags": [
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            "x_refsource_REDHAT"
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          "url": "https://access.redhat.com/security/cve/CVE-2026-87875"
        },
        {
          "name": "RHBZ#2530994",
          "tags": [
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            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2530994"
        },
        {
          "url": "https://github.com/OpenPrinting/cups/commit/0c6842fc615e8afa284136a092da8178abf5f142"
        },
        {
          "url": "https://github.com/OpenPrinting/cups/commit/2b1dc178a2d2325135b855142e384f4e8c42d8e4"
        },
        {
          "url": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-559w-7676-3xrq"
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      ],
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        {
          "lang": "en",
          "time": "2026-08-01T00:00:00.000Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-09-09T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Cups: openprinting cups: heap out-of-bounds read in cupsutf32toutf8() via missing source-length bound",
      "workarounds": [
        {
          "lang": "en",
          "value": "Fixed on upstream master branch with commit 0c6842f and for versions 2.4.x with commit 2b1dc17."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-125: Out-of-bounds Read"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-87875",
    "datePublished": "2026-09-09T16:06:27.371Z",
    "dateReserved": "2026-09-09T13:58:00.395Z",
    "dateUpdated": "2026-09-11T23:55:37.452Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

RHSA-2026:66600

CVE-2026-87875 (GCVE-0-2026-87875)

Tags

Sightings

Nomenclature