OPENSUSE-SU-2026:11601-1

Vulnerability from csaf_opensuse - Published: 2026-08-26 00:00 - Updated: 2026-09-17 17:21
Summary
LibVNCServer-devel-0.9.15-4.1 on GA media
Severity
Moderate
Notes
Title of the patch: LibVNCServer-devel-0.9.15-4.1 on GA media
Description of the patch: These are all security issues fixed in the LibVNCServer-devel-0.9.15-4.1 package on the GA media of openSUSE Tumbleweed.
Patchnames: openSUSE-Tumbleweed-2026-11601
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
Affected products
Product Identifier Version Remediation
Unresolved product id: openSUSE Tumbleweed:LibVNCServer-devel-0:0.9.15-4.1.aarch64
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:LibVNCServer-devel-0:0.9.15-4.1.ppc64le
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:LibVNCServer-devel-0:0.9.15-4.1.s390x
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:LibVNCServer-devel-0:0.9.15-4.1.x86_64
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libvncclient1-0:0.9.15-4.1.aarch64
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libvncclient1-0:0.9.15-4.1.ppc64le
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libvncclient1-0:0.9.15-4.1.s390x
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libvncclient1-0:0.9.15-4.1.x86_64
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libvncserver1-0:0.9.15-4.1.aarch64
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libvncserver1-0:0.9.15-4.1.ppc64le
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libvncserver1-0:0.9.15-4.1.s390x
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libvncserver1-0:0.9.15-4.1.x86_64
Vendor Fix
Threats
Impact important

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          "text": "https://www.suse.com/security/cve/CVE-2026-50538"
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      "notes": [
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          "category": "general",
          "text": "LibVNCClient is a library for easy implementation of a VNC client. In versions 0.9.12 through 0.9.15, a malicious (or man-in-the-middle) VNC server can force a connecting `libvncclient` to write attacker-controlled data past the end of its framebuffer. This is an out-of-bounds heap write with attacker-controlled length, contents, and offset. It needs no authentication (the attacker\nis the server), works in a default build with default settings, and fires from a single `FramebufferUpdate` the moment the victim connects. It crashes any client unconditionally (denial of service); we also demonstrated it overwriting an application callback pointer and redirecting execution to attacker-chosen code (code execution) under the default configuration. Commit 540332be3e0acc566fa64da6f1b4680c72c724dd patches the issue.",
          "title": "CVE description"
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          "summary": "SUSE Bug 1276218 for CVE-2026-50538",
          "url": "https://bugzilla.suse.com/1276218"
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          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Tumbleweed:LibVNCServer-devel-0:0.9.15-4.1.aarch64",
            "openSUSE Tumbleweed:LibVNCServer-devel-0:0.9.15-4.1.ppc64le",
            "openSUSE Tumbleweed:LibVNCServer-devel-0:0.9.15-4.1.s390x",
            "openSUSE Tumbleweed:LibVNCServer-devel-0:0.9.15-4.1.x86_64",
            "openSUSE Tumbleweed:libvncclient1-0:0.9.15-4.1.aarch64",
            "openSUSE Tumbleweed:libvncclient1-0:0.9.15-4.1.ppc64le",
            "openSUSE Tumbleweed:libvncclient1-0:0.9.15-4.1.s390x",
            "openSUSE Tumbleweed:libvncclient1-0:0.9.15-4.1.x86_64",
            "openSUSE Tumbleweed:libvncserver1-0:0.9.15-4.1.aarch64",
            "openSUSE Tumbleweed:libvncserver1-0:0.9.15-4.1.ppc64le",
            "openSUSE Tumbleweed:libvncserver1-0:0.9.15-4.1.s390x",
            "openSUSE Tumbleweed:libvncserver1-0:0.9.15-4.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "openSUSE Tumbleweed:LibVNCServer-devel-0:0.9.15-4.1.aarch64",
            "openSUSE Tumbleweed:LibVNCServer-devel-0:0.9.15-4.1.ppc64le",
            "openSUSE Tumbleweed:LibVNCServer-devel-0:0.9.15-4.1.s390x",
            "openSUSE Tumbleweed:LibVNCServer-devel-0:0.9.15-4.1.x86_64",
            "openSUSE Tumbleweed:libvncclient1-0:0.9.15-4.1.aarch64",
            "openSUSE Tumbleweed:libvncclient1-0:0.9.15-4.1.ppc64le",
            "openSUSE Tumbleweed:libvncclient1-0:0.9.15-4.1.s390x",
            "openSUSE Tumbleweed:libvncclient1-0:0.9.15-4.1.x86_64",
            "openSUSE Tumbleweed:libvncserver1-0:0.9.15-4.1.aarch64",
            "openSUSE Tumbleweed:libvncserver1-0:0.9.15-4.1.ppc64le",
            "openSUSE Tumbleweed:libvncserver1-0:0.9.15-4.1.s390x",
            "openSUSE Tumbleweed:libvncserver1-0:0.9.15-4.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-26T00:00:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-50538"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.

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Detection rules are retrieved from Rulezet.

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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.


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