Vulnerability-Lookup

RHSA-2026:51195

Vulnerability from csaf_redhat - Published: 2026-08-06 17:22 - Updated: 2026-08-07 02:44

Summary

Red Hat Security Advisory: General availability of the satellite/iop-host-inventory-rhel9 container image

Severity

Moderate

Notes

Topic: A new satellite/iop-host-inventory-rhel9 container image is now generally available in the Red Hat container registry.

Details: Red Hat Lightspeed in Satellite analyzes system health and configuration by applying predefined rules to a small set of local data, such as installed packages, running services, and configuration settings. When you install Red Hat Lightspeed in Satellite locally, you can generate Red Hat Lightspeed recommendations without sending system data to Red Hat services.

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-2026-44660

A flaw was found in UltraJSON, a fast JSON encoder and decoder. When the `ujson.dump()` function attempts to write data to a file-like object and an error occurs during this operation, the memory allocated for the serialized JSON string is not properly released. This continuous failure to deallocate memory can lead to a memory leak, potentially causing resource exhaustion and a Denial of Service (DoS) for the affected system.

7.5 (High)


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

CWE-772 - Missing Release of Resource after Effective Lifetime

Affected products

Fixed 1 product

Product	Identifier	Version	Remediation
Unresolved product id: Red Hat Satellite 6.19:registry.redhat.io/satellite/iop-host-inventory-rhel9@sha256:f0cc8221d8a11669ef4482d9779f95fdc9e7358871266144f448c6e460296872_amd64		—	Vendor Fix fix Workaround

Threats

Impact Moderate

References

15 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:51195	self
https://access.redhat.com/documentation/en-us/red…	external
https://access.redhat.com/security/cve/CVE-2026-44660	external
https://access.redhat.com/security/updates/classi…	external
https://catalog.redhat.com/software/containers/search	external
https://docs.redhat.com/en/documentation/red_hat_…	external
https://docs.redhat.com/en/documentation/red_hat_…	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-44660	self
https://bugzilla.redhat.com/show_bug.cgi?id=2482406	external
https://www.cve.org/CVERecord?id=CVE-2026-44660	external
https://nvd.nist.gov/vuln/detail/CVE-2026-44660	external
https://github.com/ultrajson/ultrajson/commit/82a…	external
https://github.com/ultrajson/ultrajson/releases/t…	external
https://github.com/ultrajson/ultrajson/security/a…	external

JSON

To clipboard

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  "vulnerabilities": [
    {
      "cve": "CVE-2026-44660",
      "cwe": {
        "id": "CWE-772",
        "name": "Missing Release of Resource after Effective Lifetime"
      },
      "discovery_date": "2026-05-27T21:01:46.330585+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2482406"
        }
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in UltraJSON, a fast JSON encoder and decoder. When the `ujson.dump()` function attempts to write data to a file-like object and an error occurs during this operation, the memory allocated for the serialized JSON string is not properly released. This continuous failure to deallocate memory can lead to a memory leak, potentially causing resource exhaustion and a Denial of Service (DoS) for the affected system.",
          "title": "Vulnerability description"
        },
        {
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          "text": "python-ujson: UltraJSON: Memory leak leading to Denial of Service",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Moderate flaw in UltraJSON can lead to a denial of service due to a memory leak when `ujson.dump()` attempts to write to a file-like object and encounters an exception. Applications utilizing `ujson.dump()` with attacker-controlled input or file-like objects are susceptible to resource exhaustion. Deployments that only use `ujson.dumps()` or JSON decoding functions are not affected.",
          "title": "Statement"
        },
        {
          "category": "general",
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        }
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      "release_date": "2026-05-27T20:42:59.830000+00:00",
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          "date": "2026-08-06T17:22:12+00:00",
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          ]
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      "scores": [
        {
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Satellite 6.19:registry.redhat.io/satellite/iop-host-inventory-rhel9@sha256:f0cc8221d8a11669ef4482d9779f95fdc9e7358871266144f448c6e460296872_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "python-ujson: UltraJSON: Memory leak leading to Denial of Service"
    }
  ]
}

CVE-2026-44660 (GCVE-0-2026-44660)

Vulnerability from cvelistv5 – Published: 2026-05-27 20:42 – Updated: 2026-05-30 01:49

Title

UltraJSON: Memory Leak in ujson.dump() on Write Failure

Summary

UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.12.1, when ujson.dump() writes to a file-like object and the write operation raises an exception, the serialized JSON string object is not decremented, leaking memory. Each failed write operation leaks the full size of the serialized payload. This vulnerability is fixed in 5.12.1.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-401 - Missing Release of Memory after Effective Lifetime

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/ultrajson/ultrajson/security/a…	x_refsource_CONFIRM
https://github.com/ultrajson/ultrajson/commit/82a…	x_refsource_MISC
https://github.com/ultrajson/ultrajson/releases/t…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
ultrajson	ultrajson	Affected: < 5.12.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-44660",
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                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-30T01:49:01.498929Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-30T01:49:35.278Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/ultrajson/ultrajson/security/advisories/GHSA-c38f-wx89-p2xg"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "ultrajson",
          "vendor": "ultrajson",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.12.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.12.1, when ujson.dump() writes to a file-like object and the write operation raises an exception, the serialized JSON string object is not decremented, leaking memory. Each failed write operation leaks the full size of the serialized payload. This vulnerability is fixed in 5.12.1."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
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              "description": "CWE-401: Missing Release of Memory after Effective Lifetime",
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              "type": "CWE"
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          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T20:42:59.830Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
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          "name": "https://github.com/ultrajson/ultrajson/security/advisories/GHSA-c38f-wx89-p2xg",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ultrajson/ultrajson/security/advisories/GHSA-c38f-wx89-p2xg"
        },
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          "tags": [
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        "discovery": "UNKNOWN"
      },
      "title": "UltraJSON: Memory Leak in ujson.dump() on Write Failure"
    }
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    "datePublished": "2026-05-27T20:42:59.830Z",
    "dateReserved": "2026-05-07T16:20:08.659Z",
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    "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.

Action not permitted

RHSA-2026:51195

CVE-2026-44660 (GCVE-0-2026-44660)

Tags

Sightings

Nomenclature