# ALAS2023-2026-1928: Security update for 3 packages ALAS2023-2026-1928, released July 6, 2026, fixes 42 CVEs across 3 products. None of them is reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/fix/linux/alas2023-2026-1928 - Platform: Linux - Released: Jul 6, 2026 - Priority: Urgent (Closes CVE-2026-12297, rated Critical) - CVEs: 42, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://alas.aws.amazon.com/AL2023/ALAS-2026-1928.html ## Applies to | Product | Release | Fixed in | |---|---|---| | [firefox](https://patchblox.com/security/data/product/linux/firefox.md) | amzn 2023 | 140.12.0-1.amzn2023.0.1 | | [firefox-debuginfo](https://patchblox.com/security/data/product/linux/firefox-debuginfo.md) | amzn 2023 | 140.12.0-1.amzn2023.0.1 | | [firefox-debugsource](https://patchblox.com/security/data/product/linux/firefox-debugsource.md) | amzn 2023 | 140.12.0-1.amzn2023.0.1 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-12295](https://patchblox.com/security/data/cve/CVE-2026-12295.md) | Urgent | Sandbox escape in the DOM: Navigation component | 9.6 | 0.0039 | | | [CVE-2026-12296](https://patchblox.com/security/data/cve/CVE-2026-12296.md) | Urgent | Sandbox escape in the Security: Process Sandboxing component | 9.6 | 0.0039 | | | [CVE-2026-12297](https://patchblox.com/security/data/cve/CVE-2026-12297.md) | Urgent | Sandbox escape due to incorrect boundary conditions in the Networking component | 9.6 | 0.0039 | | | [CVE-2026-12294](https://patchblox.com/security/data/cve/CVE-2026-12294.md) | Urgent | Sandbox escape in the DOM: Workers component | 9.6 | 0.0036 | | | [CVE-2026-12315](https://patchblox.com/security/data/cve/CVE-2026-12315.md) | Urgent | Mitigation bypass in the DOM: Security component | 9.1 | 0.0025 | | | [CVE-2026-12304](https://patchblox.com/security/data/cve/CVE-2026-12304.md) | Urgent | Same-origin policy bypass in the Networking: Cookies component | 9.1 | 0.0019 | | | [CVE-2026-56211](https://patchblox.com/security/data/cve/CVE-2026-56211.md) | High | aom: A remote code execution vulnerability was found in libaom, the reference AV1 codec implementation | 7.1 | 0.0088 | | | [CVE-2026-56210](https://patchblox.com/security/data/cve/CVE-2026-56210.md) | High | aom: A heap-buffer-overflow read vulnerability was found in libaom, the reference AV1 codec implementation | 7.1 | 0.0058 | | | [CVE-2026-12292](https://patchblox.com/security/data/cve/CVE-2026-12292.md) | High | Incorrect boundary conditions in the Web Audio component | 8.1 | 0.0049 | | | [CVE-2026-12328](https://patchblox.com/security/data/cve/CVE-2026-12328.md) | High | Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152 | 8.1 | 0.0048 | | | [CVE-2026-56208](https://patchblox.com/security/data/cve/CVE-2026-56208.md) | High | firefox: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. Secu... | 8.8 | 0.0045 | | | [CVE-2026-12327](https://patchblox.com/security/data/cve/CVE-2026-12327.md) | High | Memory safety bugs fixed in Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152 | 8.1 | 0.0041 | | | [CVE-2026-12290](https://patchblox.com/security/data/cve/CVE-2026-12290.md) | High | Memory safety bug fixed in Thunderbird 152 | 8.1 | 0.0040 | | | [CVE-2026-12289](https://patchblox.com/security/data/cve/CVE-2026-12289.md) | High | Privilege escalation in the Graphics: WebRender component | 8.8 | 0.0040 | | | [CVE-2026-12291](https://patchblox.com/security/data/cve/CVE-2026-12291.md) | High | Use-after-free in the Networking: HTTP component | 8.8 | 0.0038 | | | [CVE-2026-12305](https://patchblox.com/security/data/cve/CVE-2026-12305.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0037 | | | [CVE-2026-12329](https://patchblox.com/security/data/cve/CVE-2026-12329.md) | High | Memory safety bug fixed in Thunderbird ESR 140.12 | 7.5 | 0.0031 | | | [CVE-2026-12298](https://patchblox.com/security/data/cve/CVE-2026-12298.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0031 | | | [CVE-2026-12299](https://patchblox.com/security/data/cve/CVE-2026-12299.md) | High | JIT miscompilation in the DOM: Core & HTML component | 7.5 | 0.0031 | | | [CVE-2026-12306](https://patchblox.com/security/data/cve/CVE-2026-12306.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0026 | | | [CVE-2026-12307](https://patchblox.com/security/data/cve/CVE-2026-12307.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0026 | | | [CVE-2026-12308](https://patchblox.com/security/data/cve/CVE-2026-12308.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0026 | | | [CVE-2026-12310](https://patchblox.com/security/data/cve/CVE-2026-12310.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0025 | | | [CVE-2026-12312](https://patchblox.com/security/data/cve/CVE-2026-12312.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0025 | | | [CVE-2026-12314](https://patchblox.com/security/data/cve/CVE-2026-12314.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0025 | | | [CVE-2026-12302](https://patchblox.com/security/data/cve/CVE-2026-12302.md) | High | Mitigation bypass in the DOM: Security component | 7.5 | 0.0025 | | | [CVE-2026-12309](https://patchblox.com/security/data/cve/CVE-2026-12309.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0024 | | | [CVE-2026-12325](https://patchblox.com/security/data/cve/CVE-2026-12325.md) | High | Denial-of-service in the Graphics: ImageLib component | 7.5 | 0.0023 | | | [CVE-2026-12324](https://patchblox.com/security/data/cve/CVE-2026-12324.md) | High | Incorrect boundary conditions in the Graphics: CanvasWebGL component | 7.5 | 0.0021 | | | [CVE-2026-12311](https://patchblox.com/security/data/cve/CVE-2026-12311.md) | High | Information disclosure, sandbox escape in the Security: Process Sandboxing component | 7.5 | 0.0019 | | | [CVE-2026-12313](https://patchblox.com/security/data/cve/CVE-2026-12313.md) | High | Information disclosure, sandbox escape in the Security: Process Sandboxing component | 7.5 | 0.0018 | | | [CVE-2026-12330](https://patchblox.com/security/data/cve/CVE-2026-12330.md) | High | Incorrect boundary conditions in the Internationalization component | 7.5 | 0.0016 | | | [CVE-2026-50219](https://patchblox.com/security/data/cve/CVE-2026-50219.md) | Routine | libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur, | 6.9 | 0.0018 | | | [CVE-2026-56412](https://patchblox.com/security/data/cve/CVE-2026-56412.md) | Routine | libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219. | 5.9 | 0.0018 | | | [CVE-2026-56131](https://patchblox.com/security/data/cve/CVE-2026-56131.md) | Routine | libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation. Thus, a use-after-free can occur (similar to the CVE-2026-50219 situation). | 4.9 | 0.0018 | | | [CVE-2026-56406](https://patchblox.com/security/data/cve/CVE-2026-56406.md) | Routine | libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse. | 6.9 | 0.0017 | | | [CVE-2026-56407](https://patchblox.com/security/data/cve/CVE-2026-56407.md) | Routine | libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen. | 6.9 | 0.0017 | | | [CVE-2026-56403](https://patchblox.com/security/data/cve/CVE-2026-56403.md) | Routine | libexpat before 2.8.2 has an integer overflow in storeAtts. | 6.9 | 0.0017 | | | [CVE-2026-56132](https://patchblox.com/security/data/cve/CVE-2026-56132.md) | Routine | In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers. | 6.9 | 0.0014 | | | [CVE-2026-56404](https://patchblox.com/security/data/cve/CVE-2026-56404.md) | Routine | libexpat before 2.8.2 has an integer overflow in addBinding. | 6.9 | 0.0013 | | | [CVE-2026-56405](https://patchblox.com/security/data/cve/CVE-2026-56405.md) | Routine | libexpat before 2.8.2 has an integer overflow in getAttributeId. | 6.9 | 0.0013 | | | [CVE-2026-56408](https://patchblox.com/security/data/cve/CVE-2026-56408.md) | Routine | expat: libexpat before 2.8.2 has an integer overflow in copyString. | 6.9 | 0.0013 | | --- Data as of 2026-11-10T13:56:55Z UTC. 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