# ELSA-2026-70642: thunderbird security update ELSA-2026-70642, released September 24, 2026, fixes 44 CVEs in thunderbird (version 0:140.16.0-1.0.1.el9_8). None of them is reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/fix/linux/elsa-2026-70642 - Platform: Linux - Released: Sep 24, 2026 - Priority: Urgent (Closes CVE-2026-92240, rated Critical) - CVEs: 44, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://linux.oracle.com/errata/ELSA-2026-70642.html ## Applies to | Product | Release | Fixed in | |---|---|---| | [thunderbird](https://patchblox.com/security/data/product/linux/thunderbird.md) | ol 9 | 0:140.16.0-1.0.1.el9_8 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-92240](https://patchblox.com/security/data/cve/CVE-2026-92240.md) | Urgent | Out-of-bounds read in IMAP response parser | 9.1 | 0.0063 | | | [CVE-2026-92238](https://patchblox.com/security/data/cve/CVE-2026-92238.md) | Urgent | Ambiguous parsing of mail headers | 9.8 | 0.0054 | | | [CVE-2026-75874](https://patchblox.com/security/data/cve/CVE-2026-75874.md) | Urgent | Sandbox escape in the Remote Settings Client component | 10.0 | 0.0046 | | | [CVE-2026-84143](https://patchblox.com/security/data/cve/CVE-2026-84143.md) | Urgent | Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15 | 9.8 | 0.0038 | | | [CVE-2026-92018](https://patchblox.com/security/data/cve/CVE-2026-92018.md) | Urgent | Sandbox escape in the DOM: Core & HTML component | 9.6 | 0.0033 | | | [CVE-2026-84639](https://patchblox.com/security/data/cve/CVE-2026-84639.md) | Urgent | Uninitialized memory in MIME parsing | 9.1 | 0.0032 | | | [CVE-2026-92032](https://patchblox.com/security/data/cve/CVE-2026-92032.md) | Urgent | Sandbox escape due to invalid pointer in the Graphics component | 9.6 | 0.0032 | | | [CVE-2026-84119](https://patchblox.com/security/data/cve/CVE-2026-84119.md) | Urgent | Sandbox escape due to use-after-free in the DOM: Navigation component | 9.6 | 0.0032 | | | [CVE-2026-84121](https://patchblox.com/security/data/cve/CVE-2026-84121.md) | Urgent | Sandbox escape due to use-after-free in the DOM: Security component | 9.6 | 0.0032 | | | [CVE-2026-92239](https://patchblox.com/security/data/cve/CVE-2026-92239.md) | High | Buffer overrun in IMAP | 8.1 | 0.0041 | | | [CVE-2026-84145](https://patchblox.com/security/data/cve/CVE-2026-84145.md) | High | Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15 | 7.5 | 0.0037 | | | [CVE-2026-92005](https://patchblox.com/security/data/cve/CVE-2026-92005.md) | High | Use-after-free in the Audio/Video: Web Codecs component | 7.5 | 0.0036 | | | [CVE-2026-84131](https://patchblox.com/security/data/cve/CVE-2026-84131.md) | High | Privilege escalation due to invalid pointer in the Graphics component | 8.8 | 0.0033 | | | [CVE-2026-92006](https://patchblox.com/security/data/cve/CVE-2026-92006.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0033 | | | [CVE-2026-92022](https://patchblox.com/security/data/cve/CVE-2026-92022.md) | High | Use-after-free in the DOM: HTML Parser component | 8.8 | 0.0032 | | | [CVE-2026-92023](https://patchblox.com/security/data/cve/CVE-2026-92023.md) | High | Use-after-free in the XML component | 8.8 | 0.0032 | | | [CVE-2026-92024](https://patchblox.com/security/data/cve/CVE-2026-92024.md) | High | Use-after-free in the SVG component | 8.8 | 0.0032 | | | [CVE-2026-92025](https://patchblox.com/security/data/cve/CVE-2026-92025.md) | High | Use-after-free in the DOM: Navigation component | 8.8 | 0.0032 | | | [CVE-2026-92027](https://patchblox.com/security/data/cve/CVE-2026-92027.md) | High | Use-after-free in the DOM: Streams component | 8.8 | 0.0032 | | | [CVE-2026-92028](https://patchblox.com/security/data/cve/CVE-2026-92028.md) | High | Use-after-free in the DOM: Core & HTML component | 8.8 | 0.0032 | | | [CVE-2026-92029](https://patchblox.com/security/data/cve/CVE-2026-92029.md) | High | Use-after-free in the SVG component | 8.8 | 0.0032 | | | [CVE-2026-92016](https://patchblox.com/security/data/cve/CVE-2026-92016.md) | High | Use-after-free in the Disability Access APIs component | 8.8 | 0.0031 | | | [CVE-2026-92026](https://patchblox.com/security/data/cve/CVE-2026-92026.md) | High | Use-after-free in the Networking component | 8.8 | 0.0031 | | | [CVE-2026-92019](https://patchblox.com/security/data/cve/CVE-2026-92019.md) | High | Mitigation bypass in the Remote Settings Client component | 8.1 | 0.0031 | | | [CVE-2026-92031](https://patchblox.com/security/data/cve/CVE-2026-92031.md) | High | Information disclosure in the Graphics: ImageLib component | 7.5 | 0.0031 | | | [CVE-2026-92021](https://patchblox.com/security/data/cve/CVE-2026-92021.md) | High | Use-after-free in the JavaScript Engine: JIT component | 8.8 | 0.0028 | | | [CVE-2026-16365](https://patchblox.com/security/data/cve/CVE-2026-16365.md) | High | Privilege escalation in the DOM: Workers component | 8.8 | 0.0028 | | | [CVE-2026-84641](https://patchblox.com/security/data/cve/CVE-2026-84641.md) | High | Information disclosure due to malicious IMAP server response | 7.5 | 0.0027 | | | [CVE-2026-84640](https://patchblox.com/security/data/cve/CVE-2026-84640.md) | High | One byte overflow read in mail parser | 7.5 | 0.0026 | | | [CVE-2026-92015](https://patchblox.com/security/data/cve/CVE-2026-92015.md) | High | Privilege escalation in the WebExtensions component | 8.8 | 0.0026 | | | [CVE-2026-92007](https://patchblox.com/security/data/cve/CVE-2026-92007.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92008](https://patchblox.com/security/data/cve/CVE-2026-92008.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92009](https://patchblox.com/security/data/cve/CVE-2026-92009.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92010](https://patchblox.com/security/data/cve/CVE-2026-92010.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92011](https://patchblox.com/security/data/cve/CVE-2026-92011.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92012](https://patchblox.com/security/data/cve/CVE-2026-92012.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92013](https://patchblox.com/security/data/cve/CVE-2026-92013.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92020](https://patchblox.com/security/data/cve/CVE-2026-92020.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: WebRender component | 8.8 | 0.0026 | | | [CVE-2026-92014](https://patchblox.com/security/data/cve/CVE-2026-92014.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics component | 8.8 | 0.0024 | | | [CVE-2026-92017](https://patchblox.com/security/data/cve/CVE-2026-92017.md) | High | Privilege escalation in the DOM: Service Workers component | 8.8 | 0.0024 | | | [CVE-2026-84120](https://patchblox.com/security/data/cve/CVE-2026-84120.md) | High | Use-after-free in the Audio/Video component | 7.5 | 0.0022 | | | [CVE-2026-92030](https://patchblox.com/security/data/cve/CVE-2026-92030.md) | High | Mitigation bypass in the DOM: Copy & Paste and Drag & Drop component | 7.5 | 0.0022 | | | [CVE-2026-84122](https://patchblox.com/security/data/cve/CVE-2026-84122.md) | High | Use-after-free in the Audio/Video component | 7.5 | 0.0021 | | | [CVE-2026-84124](https://patchblox.com/security/data/cve/CVE-2026-84124.md) | High | Use-after-free in the DOM: Core & HTML component | 8.8 | 0.0017 | | --- Data as of 2026-11-07T18:46:35Z UTC. 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