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      "text" : "A flaw was found in libsoup. When handling an incoming WebSocket Pong frame, SoupWebsocketConnection emitted the ::pong signal with a GByteArray pointer even though the signal is declared to pass a GBytes. Applications connecting a handler that follows the documented GBytes API can trigger heap corruption or a crash upon receiving a crafted Pong.",
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      "text" : "This issue is rated Important. A remote peer can send a WebSocket Pong that reaches receive_pong(). Exploitation requires an application to connect a ::pong handler that expects GBytes; many keep-alive users do. Successful triggering can crash the process or corrupt heap state. libsoup WebSocket support is used by client and server applications on Red Hat platforms.",
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      "text" : "A flaw was found in libsoup. When reassembling fragmented WebSocket messages into a GByteArray, libsoup did not adequately cap total message size against the limits of the underlying buffer type. A remote peer could send fragments that caused size truncation while the implementation still used the full length, leading to heap corruption or a crash.",
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      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-102557",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-102557"
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        "baseScore" : 8.6,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "LOW",
        "integrityImpact" : "LOW",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
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    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "libsoup: libsoup: Heap buffer overflow during WebSocket message reassembly"
  }, {
    "acknowledgments" : [ {
      "names" : [ "Hongduo Zhao" ]
    } ],
    "cve" : "CVE-2026-102558",
    "cwe" : {
      "id" : "CWE-125",
      "name" : "Out-of-bounds Read"
    },
    "discovery_date" : "2026-09-03T00:00:00+00:00",
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2543274"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in libsoup. When max-incoming-payload-size is unlimited (0), SoupWebsocketConnection could grow its incoming GByteArray based on an attacker-controlled frame length until the length wrapped, causing a heap buffer overflow while reading frame data.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "libsoup: libsoup: Heap buffer overflow during WebSocket receive-buffer growth",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This issue is rated Important. A remote WebSocket peer can cause heap corruption or denial of service, especially when applications leave incoming payload size unlimited. Default configurations that set a finite max-incoming-payload-size reduce exposure but the vulnerable code path remains relevant for applications that disable the limit.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
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      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-102558",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-102558"
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        "baseScore" : 8.6,
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        "integrityImpact" : "LOW",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
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      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "libsoup: libsoup: Heap buffer overflow during WebSocket receive-buffer growth"
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    "acknowledgments" : [ {
      "names" : [ "Hongduo Zhao" ]
    } ],
    "cve" : "CVE-2026-102559",
    "cwe" : {
      "id" : "CWE-125",
      "name" : "Out-of-bounds Read"
    },
    "discovery_date" : "2026-09-03T00:00:00+00:00",
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2543285"
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    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in libsoup. When constructing a masked WebSocket client frame for a very large outgoing payload, size values passed to GByteArray allocation APIs could be truncated while the masking routine still used the full length, causing a heap buffer overflow.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "libsoup: libsoup: Heap buffer overflow during WebSocket client-frame masking",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This issue is rated Important. Triggering requires causing a libsoup WebSocket client (or client-role connection) to send an extremely large message. That may be reachable when application-level message size is attacker-influenced. Impact is heap corruption or denial of service in the sending process.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
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      "summary" : "Canonical URL",
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    }, {
      "category" : "external",
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      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-102559",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-102559"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-102559",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-102559"
    } ],
    "release_date" : "2026-09-03T00:00:00+00:00",
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      "date" : "2026-11-02T02:37:55+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",
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      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:93447"
    }, {
      "category" : "workaround",
      "details" : "To mitigate this enforce application-level limits on outgoing WebSocket message sizes. Do not send untrusted bulk data as a single WebSocket message.",
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        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 8.6,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "LOW",
        "integrityImpact" : "LOW",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
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      "details" : "Important"
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    "title" : "libsoup: libsoup: Heap buffer overflow during WebSocket client-frame masking"
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    "acknowledgments" : [ {
      "names" : [ "Hongduo Zhao" ]
    } ],
    "cve" : "CVE-2026-102560",
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    "ids" : [ {
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      "text" : "A flaw was found in libsoup. When the permessage-deflate WebSocket extension compresses a very large outgoing message, truncated size calculations used for GByteArray growth could wrap, causing zlib to write past the allocated buffer and resulting in a heap buffer overflow.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "libsoup: libsoup: Heap buffer overflow during outgoing permessage-deflate buffer growth",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This issue is rated Important. Exploitation requires the permessage-deflate extension to be negotiated and a very large outgoing message to be compressed. Applications that enable WebSocket deflate with untrusted or unbounded message sizes are affected. Impact is heap corruption or denial of service.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
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      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-102560"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-102560",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-102560"
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    "remediations" : [ {
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      "date" : "2026-11-02T02:37:55+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",
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      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:93447"
    }, {
      "category" : "workaround",
      "details" : "To mitigate this disable the permessage-deflate WebSocket extension if it is not required, and cap outgoing message sizes.",
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    } ],
    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "LOW",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 8.6,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "LOW",
        "integrityImpact" : "LOW",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
        "version" : "3.1"
      },
      "products" : [ "AppStream-9.2.0.Z.E4S:libsoup-0:2.72.0-8.el9_2.18.aarch64", "AppStream-9.2.0.Z.E4S:libsoup-0:2.72.0-8.el9_2.18.i686", "AppStream-9.2.0.Z.E4S:libsoup-0:2.72.0-8.el9_2.18.ppc64le", "AppStream-9.2.0.Z.E4S:libsoup-0:2.72.0-8.el9_2.18.s390x", "AppStream-9.2.0.Z.E4S:libsoup-0:2.72.0-8.el9_2.18.src", "AppStream-9.2.0.Z.E4S:libsoup-0:2.72.0-8.el9_2.18.x86_64", "AppStream-9.2.0.Z.E4S:libsoup-debuginfo-0:2.72.0-8.el9_2.18.aarch64", "AppStream-9.2.0.Z.E4S:libsoup-debuginfo-0:2.72.0-8.el9_2.18.i686", "AppStream-9.2.0.Z.E4S:libsoup-debuginfo-0:2.72.0-8.el9_2.18.ppc64le", "AppStream-9.2.0.Z.E4S:libsoup-debuginfo-0:2.72.0-8.el9_2.18.s390x", "AppStream-9.2.0.Z.E4S:libsoup-debuginfo-0:2.72.0-8.el9_2.18.x86_64", "AppStream-9.2.0.Z.E4S:libsoup-debugsource-0:2.72.0-8.el9_2.18.aarch64", "AppStream-9.2.0.Z.E4S:libsoup-debugsource-0:2.72.0-8.el9_2.18.i686", "AppStream-9.2.0.Z.E4S:libsoup-debugsource-0:2.72.0-8.el9_2.18.ppc64le", "AppStream-9.2.0.Z.E4S:libsoup-debugsource-0:2.72.0-8.el9_2.18.s390x", "AppStream-9.2.0.Z.E4S:libsoup-debugsource-0:2.72.0-8.el9_2.18.x86_64", "AppStream-9.2.0.Z.E4S:libsoup-devel-0:2.72.0-8.el9_2.18.aarch64", "AppStream-9.2.0.Z.E4S:libsoup-devel-0:2.72.0-8.el9_2.18.i686", "AppStream-9.2.0.Z.E4S:libsoup-devel-0:2.72.0-8.el9_2.18.ppc64le", "AppStream-9.2.0.Z.E4S:libsoup-devel-0:2.72.0-8.el9_2.18.s390x", "AppStream-9.2.0.Z.E4S:libsoup-devel-0:2.72.0-8.el9_2.18.x86_64" ]
    } ],
    "threats" : [ {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "libsoup: libsoup: Heap buffer overflow during outgoing permessage-deflate buffer growth"
  } ]
}