Vulnerability-Lookup

RHSA-2026:68272

Vulnerability from csaf_redhat - Published: 2026-09-16 15:29 - Updated: 2026-10-02 18:48

Summary

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

Severity

Important

Notes

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

Details: This update includes the following RPMs: opentelemetry-collector: * opentelemetry-collector-0.161.0-0.1.hum1 (aarch64, x86_64) * opentelemetry-collector-0.161.0-0.1.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-2026-63209

A flaw was found in the klauspost/compress package. A remote attacker can exploit this vulnerability by supplying a specially crafted compression dictionary with an excessively large repeat value, triggering an integer overflow. When the dictionary is subsequently processed, this overflow leads to out-of-bounds memory access, crashing the application and resulting in a Denial of Service (DoS).

7.5 (High)


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

CWE-823 - Use of Out-of-range Pointer Offset

Affected products

Fixed 3 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:opentelemetry-collector-0:0.161.0-0.1.hum1@aarch64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:opentelemetry-collector-0:0.161.0-0.1.hum1@src	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:opentelemetry-collector-0:0.161.0-0.1.hum1@x86_64	—	Vendor Fix fix Workaround

Threats

Impact Important

CVE-2026-81872

A flaw was found in the OpenTelemetry-Go `BatchingProcessor` component. A remote attacker can exploit this by sending a high volume of log emissions, which can fill the asynchronous export buffer. This causes the processor to enter a tight CPU loop, repeatedly retrying to export logs without proper waiting mechanisms. The consequence is the exhaustion of CPU resources, leading to a degradation or denial of service (DoS) in the affected application.

5.3 (Medium)


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

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Affected products

Fixed 3 products, the same list as for CVE-2026-63209

Threats

Impact Moderate

References

23 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:68272	self
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2026-81872	external
https://access.redhat.com/security/updates/classi…	external
https://access.redhat.com/security/cve/CVE-2026-93450	external
https://access.redhat.com/security/cve/CVE-2026-63209	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-63209	self
https://bugzilla.redhat.com/show_bug.cgi?id=2543236	external
https://www.cve.org/CVERecord?id=CVE-2026-63209	external
https://nvd.nist.gov/vuln/detail/CVE-2026-63209	external
https://github.com/klauspost/compress/commit/5392…	external
https://github.com/klauspost/compress/releases/ta…	external
https://github.com/klauspost/compress/security/ad…	external
https://access.redhat.com/security/cve/CVE-2026-81872	self
https://bugzilla.redhat.com/show_bug.cgi?id=2535727	external
https://www.cve.org/CVERecord?id=CVE-2026-81872	external
https://nvd.nist.gov/vuln/detail/CVE-2026-81872	external
https://github.com/open-telemetry/opentelemetry-g…	external
https://github.com/open-telemetry/opentelemetry-g…	external
https://github.com/open-telemetry/opentelemetry-g…	external
https://github.com/open-telemetry/opentelemetry-g…	external
https://github.com/open-telemetry/opentelemetry-g…	external

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          "title": "Vulnerability description"
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            "baseSeverity": "MEDIUM",
            "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:L",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:opentelemetry-collector-0:0.161.0-0.1.hum1@aarch64",
            "Red Hat Hardened Images:opentelemetry-collector-0:0.161.0-0.1.hum1@src",
            "Red Hat Hardened Images:opentelemetry-collector-0:0.161.0-0.1.hum1@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "go.opentelemetry.io/otel/sdk/log: OpenTelemetry-Go: Denial of Service via attacker-driven log emission"
    }
  ]
}

CVE-2026-63209 (GCVE-0-2026-63209)

Vulnerability from cvelistv5 – Published: 2026-09-29 14:58 – Updated: 2026-09-29 16:32

Title

Integer Overflow or Wraparound and Out-of-bounds Write in compress

Summary

compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. This issue has been patched in version 1.18.7.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-29 16:31 UTC

CWE

CWE-190 - Integer Overflow or Wraparound
CWE-787 - Out-of-bounds Write

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/klauspost/compress/security/ad…	x_refsource_CONFIRM
https://github.com/klauspost/compress/commit/5392…	x_refsource_MISC
https://github.com/klauspost/compress/releases/ta…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
klauspost	compress	Affected: < 1.18.7

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-63209",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-29T16:31:39.668233Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-09-29T16:32:32.677Z",
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          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/klauspost/compress/security/advisories/GHSA-259r-337f-4rfw"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "compress",
          "vendor": "klauspost",
          "versions": [
            {
              "status": "affected",
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            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. This issue has been patched in version 1.18.7."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          }
        }
      ],
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          "descriptions": [
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              "description": "CWE-190: Integer Overflow or Wraparound",
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              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-29T14:58:53.366Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/klauspost/compress/security/advisories/GHSA-259r-337f-4rfw",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/klauspost/compress/security/advisories/GHSA-259r-337f-4rfw"
        },
        {
          "name": "https://github.com/klauspost/compress/commit/539243b8823ee8f03e49969823d57c348c917536",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/klauspost/compress/commit/539243b8823ee8f03e49969823d57c348c917536"
        },
        {
          "name": "https://github.com/klauspost/compress/releases/tag/v1.18.7",
          "tags": [
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          "url": "https://github.com/klauspost/compress/releases/tag/v1.18.7"
        }
      ],
      "source": {
        "advisory": "GHSA-259r-337f-4rfw",
        "discovery": "UNKNOWN"
      },
      "title": "Integer Overflow or Wraparound and Out-of-bounds Write in compress"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-63209",
    "datePublished": "2026-09-29T14:58:53.366Z",
    "dateReserved": "2026-07-15T22:19:06.906Z",
    "dateUpdated": "2026-09-29T16:32:32.677Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-81872 (GCVE-0-2026-81872)

Vulnerability from cvelistv5 – Published: 2026-09-16 20:42 – Updated: 2026-09-17 13:36

Title

OpenTelemetry-Go: BatchProcessor can busy-spin when export buffer is full

Summary

OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.21.0, the go.opentelemetry.io/otel/sdk/log BatchingProcessor can enter a tight CPU loop when attacker-driven log emission fills its asynchronous export buffer while the exporter is backpressured. NewBatchingProcessor wraps the exporter with newBufferExporter(exporter, 1), and the poll loop calls queue.TryDequeue and bufferExporter.EnqueueExport before immediately signaling pollTrigger whenever the queue remains at or above batchSize. Because a failed nonblocking EnqueueExport leaves the queue length unchanged, the processor repeatedly retries without waiting for its ticker, exhausting CPU and degrading or denying service in the embedding process. This issue is fixed in version 0.21.0.

Severity

6.3 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-17 13:36 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-834 - Excessive Iteration

Assigner

GitHub_M mitre root

References

5 references

URL	Tags
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_CONFIRM
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_MISC
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_MISC
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_MISC
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
open-telemetry	opentelemetry-go	Affected: < 0.21.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-81872",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-17T13:36:11.140898Z",
                "version": "2.0.3"
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              "type": "ssvc"
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        "providerMetadata": {
          "dateUpdated": "2026-09-17T13:36:27.289Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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            "tags": [
              "exploit"
            ],
            "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-hjf4-fphr-2h65"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "opentelemetry-go",
          "vendor": "open-telemetry",
          "versions": [
            {
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              "version": "\u003c 0.21.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.21.0, the go.opentelemetry.io/otel/sdk/log BatchingProcessor can enter a tight CPU loop when attacker-driven log emission fills its asynchronous export buffer while the exporter is backpressured. NewBatchingProcessor wraps the exporter with newBufferExporter(exporter, 1), and the poll loop calls queue.TryDequeue and bufferExporter.EnqueueExport before immediately signaling pollTrigger whenever the queue remains at or above batchSize. Because a failed nonblocking EnqueueExport leaves the queue length unchanged, the processor repeatedly retries without waiting for its ticker, exhausting CPU and degrading or denying service in the embedding process. This issue is fixed in version 0.21.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
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            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
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            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
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              "cweId": "CWE-400",
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en",
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            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-834",
              "description": "CWE-834: Excessive Iteration",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T20:42:23.507Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
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          ],
          "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-hjf4-fphr-2h65"
        },
        {
          "name": "https://github.com/open-telemetry/opentelemetry-go/issues/6797",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-telemetry/opentelemetry-go/issues/6797"
        },
        {
          "name": "https://github.com/open-telemetry/opentelemetry-go/pull/8620",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-telemetry/opentelemetry-go/pull/8620"
        },
        {
          "name": "https://github.com/open-telemetry/opentelemetry-go/commit/ba71b09e6ed272e93a669aeaec1e98b1df4cc582",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-telemetry/opentelemetry-go/commit/ba71b09e6ed272e93a669aeaec1e98b1df4cc582"
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          "tags": [
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          ],
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      ],
      "source": {
        "advisory": "GHSA-hjf4-fphr-2h65",
        "discovery": "UNKNOWN"
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      "title": "OpenTelemetry-Go: BatchProcessor can busy-spin when export buffer is full"
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  },
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  },
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

RHSA-2026:68272

CVE-2026-63209 (GCVE-0-2026-63209)

CVE-2026-81872 (GCVE-0-2026-81872)

Tags

Sightings

Nomenclature

Related by attack behaviour