Vulnerability-Lookup

CVE-2026-9149 (GCVE-0-2026-9149)

Vulnerability from cvelistv5 – Published: 2026-05-20 23:34 – Updated: 2026-05-21 18:39

Title

Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file

Summary

A flaw was found in libsolv. This heap buffer overflow vulnerability occurs when a victim processes a specially crafted `.solv` file containing negative size values in the `repo_add_solv` function. This leads to an undersized memory allocation and a subsequent out-of-bounds write. An attacker could exploit this to cause a denial of service (DoS).

Severity

6.5 (Medium)


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

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

redhat

References

3 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-9149	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2460380	issue-trackingx_refsource_REDHAT
https://github.com/openSUSE/libsolv/pull/617

Impacted products

8 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
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 Hardened Images	cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4
Red Hat	Red Hat Satellite 6	cpe:/a:redhat:satellite:6
Red Hat	Red Hat Update Infrastructure 4 for Cloud Providers	cpe:/a:redhat:rhui:4::el8

Date Public

2026-05-20 22:19

Credits

This issue was discovered by AISLE in partnership with Red Hat.

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-9149

Vulnerability from fkie_nvd - Published: 2026-05-21 00:16 - Updated: 2026-05-21 15:26

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-9149
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2460380
	secalert@redhat.com	https://github.com/openSUSE/libsolv/pull/617
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/openSUSE/libsolv/pull/617

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-9Q56-XF64-Q987

Vulnerability from github – Published: 2026-05-21 00:30 – Updated: 2026-05-21 00:30

Details

A flaw was found in libsolv. This heap buffer overflow vulnerability occurs when a victim processes a specially crafted .solv file containing negative size values in the repo_add_solv function. This leads to an undersized memory allocation and a subsequent out-of-bounds write. An attacker could exploit this to cause a denial of service (DoS).

Severity

6.5 (Medium)


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

Show details on source website

JSON

To clipboard

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  "modified": "2026-05-21T00:30:27Z",
  "published": "2026-05-21T00:30:27Z",
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      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-9149

Vulnerability from csaf_microsoft - Published: 2026-05-02 00:00 - Updated: 2026-05-27 01:18

Summary

Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-9149

CWE-122 - Heap-based Buffer Overflow

Affected products

Under investigation 1 product

Product	Identifier	Version	Remediation
Unresolved product id: 17084-1		—

References

4 references

URL	Category
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
https://support.microsoft.com/lifecycle	external
https://www.first.org/cvss	external
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-9149 Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-9149.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file",
    "tracking": {
      "current_release_date": "2026-05-27T01:18:12.000Z",
      "generator": {
        "date": "2026-05-27T07:15:09.602Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-9149",
      "initial_release_date": "2026-05-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-05-27T01:18:12.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-9149",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
      },
      "notes": [
        {
          "category": "general",
          "text": "redhat",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "under_investigation": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-9149 Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-9149.json"
        }
      ],
      "title": "Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file"
    }
  ]
}

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.

Action not permitted

CVE-2026-9149 (GCVE-0-2026-9149)

FKIE_CVE-2026-9149

GHSA-9Q56-XF64-Q987

MSRC_CVE-2026-9149

Tags

Sightings

Nomenclature