# SUSE-SU-2025:02546-1: MozillaThunderbird security update SUSE-SU-2025:02546-1, released July 30, 2025, fixes 25 CVEs in MozillaThunderbird (version 140.1.0-150200.8.230.1). None of them is reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/fix/linux/suse-su-2025-02546-1 - Platform: Linux - Released: Jul 30, 2025 - Priority: High (Closes CVE-2025-6424, high severity) - CVEs: 25, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://osv.dev/vulnerability/SUSE-SU-2025:02546-1 ## Applies to | Product | Release | Fixed in | |---|---|---| | [MozillaThunderbird](https://patchblox.com/security/data/product/linux/mozillathunderbird.md) | opensuse-leap 15.6 | 140.1.0-150200.8.230.1 | | [MozillaThunderbird](https://patchblox.com/security/data/product/linux/mozillathunderbird.md) | sles 15.6 | 140.1.0-150200.8.230.1 | | [MozillaThunderbird](https://patchblox.com/security/data/product/linux/mozillathunderbird.md) | sles 15.7 | 140.1.0-150200.8.230.1 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2025-6424](https://patchblox.com/security/data/cve/CVE-2025-6424.md) | High | Use-after-free in FontFaceSet | 9.8 | 0.0790 | | | [CVE-2025-6436](https://patchblox.com/security/data/cve/CVE-2025-6436.md) | High | Memory safety bugs fixed in Firefox 140 and Thunderbird 140 | 8.1 | 0.0426 | | | [CVE-2025-8028](https://patchblox.com/security/data/cve/CVE-2025-8028.md) | High | Large branch table could lead to truncated instruction | 9.8 | 0.0058 | | | [CVE-2025-8031](https://patchblox.com/security/data/cve/CVE-2025-8031.md) | High | Incorrect URL stripping in CSP reports | 9.8 | 0.0051 | | | [CVE-2025-8034](https://patchblox.com/security/data/cve/CVE-2025-8034.md) | High | Memory safety bugs fixed 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 | 8.8 | 0.0046 | | | [CVE-2025-6435](https://patchblox.com/security/data/cve/CVE-2025-6435.md) | High | Save as in Devtools could download files without sanitizing the extension | 8.1 | 0.0046 | | | [CVE-2025-8036](https://patchblox.com/security/data/cve/CVE-2025-8036.md) | High | DNS rebinding circumvents CORS | 8.1 | 0.0045 | | | [CVE-2025-8027](https://patchblox.com/security/data/cve/CVE-2025-8027.md) | High | JavaScript engine only wrote partial return value to stack | 7.5 | 0.0043 | | | [CVE-2025-8033](https://patchblox.com/security/data/cve/CVE-2025-8033.md) | High | Incorrect JavaScript state machine for generators | 7.5 | 0.0043 | | | [CVE-2025-8035](https://patchblox.com/security/data/cve/CVE-2025-8035.md) | High | Memory safety bugs fixed in Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141 | 8.8 | 0.0040 | | | [CVE-2025-8029](https://patchblox.com/security/data/cve/CVE-2025-8029.md) | High | javascript: URLs executed on object and embed tags | 8.1 | 0.0038 | | | [CVE-2025-8030](https://patchblox.com/security/data/cve/CVE-2025-8030.md) | High | Potential user-assisted code execution in “Copy as cURL” command | 8.1 | 0.0038 | | | [CVE-2025-8032](https://patchblox.com/security/data/cve/CVE-2025-8032.md) | High | XSLT documents could bypass CSP | 8.1 | 0.0038 | | | [CVE-2025-6427](https://patchblox.com/security/data/cve/CVE-2025-6427.md) | High | connect-src Content Security Policy restriction could be bypassed | 9.1 | 0.0037 | | | [CVE-2025-8040](https://patchblox.com/security/data/cve/CVE-2025-8040.md) | High | Memory safety bugs fixed in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141 | 8.8 | 0.0037 | | | [CVE-2025-6429](https://patchblox.com/security/data/cve/CVE-2025-6429.md) | High | Incorrect parsing of URLs could have allowed embedding of youtube.com | 7.5 | 0.0035 | | | [CVE-2025-6432](https://patchblox.com/security/data/cve/CVE-2025-6432.md) | High | DNS Requests leaked outside of a configured SOCKS proxy | 8.6 | 0.0035 | | | [CVE-2025-8039](https://patchblox.com/security/data/cve/CVE-2025-8039.md) | High | Search terms persisted in URL bar | 8.1 | 0.0034 | | | [CVE-2025-6425](https://patchblox.com/security/data/cve/CVE-2025-6425.md) | High | The WebCompat WebExtension shipped with Firefox exposed a persistent UUID | 7.5 | 0.0031 | | | [CVE-2025-6433](https://patchblox.com/security/data/cve/CVE-2025-6433.md) | High | WebAuthn would allow a user to sign a challenge on a webpage with an invalid TLS certificate | 9.8 | 0.0030 | | | [CVE-2025-8038](https://patchblox.com/security/data/cve/CVE-2025-8038.md) | High | CSP frame-src was not correctly enforced for paths | 9.8 | 0.0027 | | | [CVE-2025-8037](https://patchblox.com/security/data/cve/CVE-2025-8037.md) | High | Nameless cookies shadow secure cookies | 9.1 | 0.0027 | | | [CVE-2025-6430](https://patchblox.com/security/data/cve/CVE-2025-6430.md) | High | Content-Disposition header ignored when a file is included in an embed or object tag | 7.5 | 0.0027 | | | [CVE-2025-6434](https://patchblox.com/security/data/cve/CVE-2025-6434.md) | Routine | HTTPS-Only exception screen lacked anti-clickjacking delay | 4.3 | 0.0028 | | | [CVE-2025-6426](https://patchblox.com/security/data/cve/CVE-2025-6426.md) | Routine | thunderbird: The executable file warning did not warn users before opening files with the `terminal` extension | n/a | 0.0021 | | --- Data as of 2026-11-10T13:56:55Z UTC. 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