RHSA-2026:0078

Vulnerability from csaf_redhat - Published: 2026-01-05 17:40 - Updated: 2026-01-08 03:12
Summary
Red Hat Security Advisory: spice-client-win security update

Notes

Topic
An update for spice-client-win is now available for Red Hat Enterprise Linux 8.2 Advanced Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
Spice client MSI installers for Windows clients Security Fix(es): * sqlite: Integer Truncation in SQLite (CVE-2025-6965) * libtiff: LibTIFF Use-After-Free Vulnerability (CVE-2025-8176) * libtiff: Libtiff Write-What-Where (CVE-2025-9900) * expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing (CVE-2025-59375) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
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.
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        {
          "category": "description",
          "text": "A flaw was found in Libtiff. This vulnerability is a \"write-what-where\" condition, triggered when the library processes a specially crafted TIFF image file.\n\nBy providing an abnormally large image height value in the file\u0027s metadata, an attacker can trick the library into writing attacker-controlled color data to an arbitrary memory location. This memory corruption can be exploited to cause a denial of service (application crash) or to achieve arbitrary code execution with the permissions of the user.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "libtiff: Libtiff Write-What-Where",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This attack requires user interaction to run the malicious TIFF image file, hence the CVE is maintained as important.",
          "title": "Statement"
        },
        {
          "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.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "AppStream-8.2.0.Z.AUS:spice-client-win-0:8.10-3.el8_2.1.src",
          "AppStream-8.2.0.Z.AUS:spice-client-win-x64-0:8.10-3.el8_2.1.noarch",
          "AppStream-8.2.0.Z.AUS:spice-client-win-x86-0:8.10-3.el8_2.1.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-9900"
        },
        {
          "category": "external",
          "summary": "RHBZ#2392784",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2392784"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-9900",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-9900"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-9900",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-9900"
        },
        {
          "category": "external",
          "summary": "https://github.com/SexyShoelessGodofWar/LibTiff-4.7.0-Write-What-Where?tab=readme-ov-file",
          "url": "https://github.com/SexyShoelessGodofWar/LibTiff-4.7.0-Write-What-Where?tab=readme-ov-file"
        },
        {
          "category": "external",
          "summary": "https://gitlab.com/libtiff/libtiff/-/issues/704",
          "url": "https://gitlab.com/libtiff/libtiff/-/issues/704"
        },
        {
          "category": "external",
          "summary": "https://gitlab.com/libtiff/libtiff/-/merge_requests/732",
          "url": "https://gitlab.com/libtiff/libtiff/-/merge_requests/732"
        },
        {
          "category": "external",
          "summary": "https://libtiff.gitlab.io/libtiff/releases/v4.7.1.html",
          "url": "https://libtiff.gitlab.io/libtiff/releases/v4.7.1.html"
        }
      ],
      "release_date": "2025-09-22T14:29:35.767000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-01-05T17:40:30+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "AppStream-8.2.0.Z.AUS:spice-client-win-0:8.10-3.el8_2.1.src",
            "AppStream-8.2.0.Z.AUS:spice-client-win-x64-0:8.10-3.el8_2.1.noarch",
            "AppStream-8.2.0.Z.AUS:spice-client-win-x86-0:8.10-3.el8_2.1.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:0078"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
          "product_ids": [
            "AppStream-8.2.0.Z.AUS:spice-client-win-0:8.10-3.el8_2.1.src",
            "AppStream-8.2.0.Z.AUS:spice-client-win-x64-0:8.10-3.el8_2.1.noarch",
            "AppStream-8.2.0.Z.AUS:spice-client-win-x86-0:8.10-3.el8_2.1.noarch"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "AppStream-8.2.0.Z.AUS:spice-client-win-0:8.10-3.el8_2.1.src",
            "AppStream-8.2.0.Z.AUS:spice-client-win-x64-0:8.10-3.el8_2.1.noarch",
            "AppStream-8.2.0.Z.AUS:spice-client-win-x86-0:8.10-3.el8_2.1.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "libtiff: Libtiff Write-What-Where"
    },
    {
      "cve": "CVE-2025-59375",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "discovery_date": "2025-09-15T03:00:59.775098+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2395108"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A memory amplification vulnerability in libexpat allows attackers to trigger excessive dynamic memory allocations by submitting specially crafted XML input. A small input (~250 KiB) can cause the parser to allocate hundreds of megabytes, leading to denial-of-service (DoS) through memory exhaustion.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue is Important rather than Critical because, while it allows for significant resource exhaustion leading to denial-of-service (DoS), it does not enable arbitrary code execution, data leakage, or privilege escalation. The vulnerability stems from an uncontrolled memory amplification behavior in libexpat\u2019s parser, where a relatively small XML payload can cause disproportionately large heap allocations. However, the flaw is limited in scope to service disruption and requires the attacker to submit a crafted XML document\u2014something that can be mitigated with proper input validation and memory usage limits. Therefore, while the exploitability is high, the impact is confined to availability, not confidentiality or integrity, making it a high-severity but not critical flaw.\n\nIn Firefox and Thunderbird, where libexpat is a transitive userspace dependency, exploitation usually just crashes the application (app-level DoS), so it is classify as Moderate instead of Important.",
          "title": "Statement"
        },
        {
          "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.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "AppStream-8.2.0.Z.AUS:spice-client-win-0:8.10-3.el8_2.1.src",
          "AppStream-8.2.0.Z.AUS:spice-client-win-x64-0:8.10-3.el8_2.1.noarch",
          "AppStream-8.2.0.Z.AUS:spice-client-win-x86-0:8.10-3.el8_2.1.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-59375"
        },
        {
          "category": "external",
          "summary": "RHBZ#2395108",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395108"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-59375",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-59375"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-59375",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-59375"
        },
        {
          "category": "external",
          "summary": "https://github.com/libexpat/libexpat/blob/676a4c531ec768732fac215da9730b5f50fbd2bf/expat/Changes#L45-L74",
          "url": "https://github.com/libexpat/libexpat/blob/676a4c531ec768732fac215da9730b5f50fbd2bf/expat/Changes#L45-L74"
        },
        {
          "category": "external",
          "summary": "https://github.com/libexpat/libexpat/issues/1018",
          "url": "https://github.com/libexpat/libexpat/issues/1018"
        },
        {
          "category": "external",
          "summary": "https://github.com/libexpat/libexpat/pull/1034",
          "url": "https://github.com/libexpat/libexpat/pull/1034"
        },
        {
          "category": "external",
          "summary": "https://issues.oss-fuzz.com/issues/439133977",
          "url": "https://issues.oss-fuzz.com/issues/439133977"
        }
      ],
      "release_date": "2025-09-15T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-01-05T17:40:30+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "AppStream-8.2.0.Z.AUS:spice-client-win-0:8.10-3.el8_2.1.src",
            "AppStream-8.2.0.Z.AUS:spice-client-win-x64-0:8.10-3.el8_2.1.noarch",
            "AppStream-8.2.0.Z.AUS:spice-client-win-x86-0:8.10-3.el8_2.1.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:0078"
        },
        {
          "category": "workaround",
          "details": "To mitigate the issue, limit XML input size and complexity before parsing, and avoid accepting compressed or deeply nested XML. Use OS-level resource controls (like ulimit or setrlimit()) to cap memory usage, or run the parser in a sandboxed or isolated process with strict memory and CPU limits. This helps prevent denial-of-service by containing excessive resource consumption.",
          "product_ids": [
            "AppStream-8.2.0.Z.AUS:spice-client-win-0:8.10-3.el8_2.1.src",
            "AppStream-8.2.0.Z.AUS:spice-client-win-x64-0:8.10-3.el8_2.1.noarch",
            "AppStream-8.2.0.Z.AUS:spice-client-win-x86-0:8.10-3.el8_2.1.noarch"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "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": [
            "AppStream-8.2.0.Z.AUS:spice-client-win-0:8.10-3.el8_2.1.src",
            "AppStream-8.2.0.Z.AUS:spice-client-win-x64-0:8.10-3.el8_2.1.noarch",
            "AppStream-8.2.0.Z.AUS:spice-client-win-x86-0:8.10-3.el8_2.1.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing"
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.