Memory safety bugs present in Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 142 and Thunderbird < 142.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Memory safety bugs present in Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of     memory corruption and we presume that with enough effort some of these could have been exploited to run     arbitrary code. This vulnerability affects Firefox < 142 and Thunderbird < 142. (CVE-2025-9187)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:03008-1 advisory.

    - Firefox Extended Support Release 140.2.0 ESR       MFSA 2025-67 (bsc#1248162)
      * CVE-2025-9179 (bmo#1979527):
        Sandbox escape due to invalid pointer in the Audio/Video: GMP         component
      * CVE-2025-9180 (bmo#1979782):
        Same-origin policy bypass in the Graphics: Canvas2D component
      * CVE-2025-9181 (bmo#1977130):
        Uninitialized memory in the JavaScript Engine component
      * CVE-2025-9182 (bmo#1975837):
        Denial-of-service due to out-of-memory in the Graphics:
        WebRender component
      * CVE-2025-9183 (bmo#1976102):
        Spoofing issue in the Address Bar component
      * CVE-2025-9184 (bmo#1929482, bmo#1976376, bmo#1979163,         bmo#1979955):
        Memory safety bugs fixed in Firefox ESR 140.2, Thunderbird         ESR 140.2, Firefox 142 and Thunderbird 142
      * CVE-2025-9185 (bmo#1970154, bmo#1976782, bmo#1977166):
        Memory safety bugs fixed in Firefox ESR 115.27, Firefox ESR         128.14, Thunderbird ESR 128.14, Firefox ESR 140.2,         Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142
      * CVE-2025-9187 (bmo#1825621, bmo#1970079, bmo#1976736,         bmo#1979072): Memory safety bugs fixed in Firefox 142 and         Thunderbird 142

    - Other fixes:
      * Ensure the use of the correct file-picker on KDE (bsc#1226112)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:03009-1 advisory.

    - Firefox Extended Support Release 140.2.0 ESR       MFSA 2025-67 (bsc#1248162)
      * CVE-2025-9179 (bmo#1979527):
        Sandbox escape due to invalid pointer in the Audio/Video: GMP         component
      * CVE-2025-9180 (bmo#1979782):
        Same-origin policy bypass in the Graphics: Canvas2D component
      * CVE-2025-9181 (bmo#1977130):
        Uninitialized memory in the JavaScript Engine component
      * CVE-2025-9182 (bmo#1975837):
        Denial-of-service due to out-of-memory in the Graphics:
        WebRender component
      * CVE-2025-9183 (bmo#1976102):
        Spoofing issue in the Address Bar component
      * CVE-2025-9184 (bmo#1929482, bmo#1976376, bmo#1979163,         bmo#1979955):
        Memory safety bugs fixed in Firefox ESR 140.2, Thunderbird         ESR 140.2, Firefox 142 and Thunderbird 142
      * CVE-2025-9185 (bmo#1970154, bmo#1976782, bmo#1977166):
        Memory safety bugs fixed in Firefox ESR 115.27, Firefox ESR         128.14, Thunderbird ESR 128.14, Firefox ESR 140.2,         Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142
      * CVE-2025-9187 (bmo#1825621, bmo#1970079, bmo#1976736,         bmo#1979072): Memory safety bugs fixed in Firefox 142 and         Thunderbird 142

    - Other fixes:
      * Ensure the use of the correct file-picker on KDE (bsc#1226112)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 07335fb9-7eb1-11f0-ba14-b42e991fc52e advisory.

    security@mozilla.org reports:
    Memory safety bugs present in Firefox 141 and Thunderbird               141. Some of these bugs showed evidence of memory corruption               and we presume that with enough effort some of these could               have been exploited to run arbitrary code.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-e689575030 advisory.

    - Updated to new upstream release (142.0)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Firefox installed on the remote Windows host is prior to 142.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-64 advisory.

  - Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR     140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of     memory corruption and we presume that with enough effort some of these could have been exploited to run     arbitrary code. (CVE-2025-9185)

  - An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This     process is also heavily sandboxed, but represents slightly different privileges from the content process.
    (CVE-2025-9179)

  - 'Same-origin policy bypass in the Graphics: Canvas2D component.' (CVE-2025-9180)

  - Uninitialized memory in the JavaScript Engine component. (CVE-2025-9181)

  - Spoofing issue in the Address Bar component of Firefox Focus for Android. (CVE-2025-9186)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Firefox installed on the remote macOS or Mac OS X host is prior to 142.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-64 advisory.

  - Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR     140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of     memory corruption and we presume that with enough effort some of these could have been exploited to run     arbitrary code. (CVE-2025-9185)

  - An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This     process is also heavily sandboxed, but represents slightly different privileges from the content process.
    (CVE-2025-9179)

  - 'Same-origin policy bypass in the Graphics: Canvas2D component.' (CVE-2025-9180)

  - Uninitialized memory in the JavaScript Engine component. (CVE-2025-9181)

  - Spoofing issue in the Address Bar component of Firefox Focus for Android. (CVE-2025-9186)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 142.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-70 advisory.

  - Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR     140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of     memory corruption and we presume that with enough effort some of these could have been exploited to run     arbitrary code. (CVE-2025-9185)

  - An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This     process is also heavily sandboxed, but represents slightly different privileges from the content process.
    (CVE-2025-9179)

  - 'Same-origin policy bypass in the Graphics: Canvas2D component.' (CVE-2025-9180)

  - Uninitialized memory in the JavaScript Engine component. (CVE-2025-9181)

  - 'Denial-of-service due to out-of-memory in the Graphics: WebRender component.' (CVE-2025-9182)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Thunderbird installed on the remote Windows host is prior to 142.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-70 advisory.

  - Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR     140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of     memory corruption and we presume that with enough effort some of these could have been exploited to run     arbitrary code. (CVE-2025-9185)

  - An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This     process is also heavily sandboxed, but represents slightly different privileges from the content process.
    (CVE-2025-9179)

  - 'Same-origin policy bypass in the Graphics: Canvas2D component.' (CVE-2025-9180)

  - Uninitialized memory in the JavaScript Engine component. (CVE-2025-9181)

  - 'Denial-of-service due to out-of-memory in the Graphics: WebRender component.' (CVE-2025-9182)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
260157	Linux Distros Unpatched Vulnerability : CVE-2025-9187	Nessus	Misc.	critical
258109	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : MozillaFirefox (SUSE-SU-2025:03008-1)	Nessus	SuSE Local Security Checks	critical
258100	SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2025:03009-1)	Nessus	SuSE Local Security Checks	critical
255289	FreeBSD : Mozilla -- memory safety bugs (07335fb9-7eb1-11f0-ba14-b42e991fc52e)	Nessus	FreeBSD Local Security Checks	critical
252914	Fedora 42 : firefox (2025-e689575030)	Nessus	Fedora Local Security Checks	high
252321	Mozilla Firefox < 142.0	Nessus	Windows	high
252320	Mozilla Firefox < 142.0	Nessus	MacOS X Local Security Checks	high
252313	Mozilla Thunderbird < 142.0	Nessus	MacOS X Local Security Checks	high
252312	Mozilla Thunderbird < 142.0	Nessus	Windows	high

Detections

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CVE-2025-9187

critical

Tenable Plugins

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critical

critical

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high

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high

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high