Skip to content
OpenAdvisories
High ALAS2-2026-3190 3 CVEs

Important: thunderbird security update (Amazon Linux 2)

Published Mar 2, 2026 · Updated Mar 5, 2026

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-2447: Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, Firefox ESR < 115.32.1, Thunderbird < 140.7.2, and Thunderbird < 147.0.2. CVE-2026-1837: A specially-crafted file can cause libjxl's decoder to write pixel data to uninitialized unallocated memory. Soon after that data from another uninitialized unallocated region is copied to pixel data. This can be done by requesting color transformation of grayscale images to another grayscale color space. Buffers allocated for 1-float-per-pixel are used as if they are allocated for 3-float-per-pixel. That happens only if LCMS2 is used as CMS engine. There is another CMS engine available (selected by build flags). CVE-2025-12474: A specially-crafted file can cause libjxl's decoder to read pixel data from uninitialized (but allocated) memory. This can be done by causing the decoder to reference an outside-image-bound area in a subsequent patches. An incorrect optimization causes the decoder to omit populating those areas.

Fixed packages 1

ReleasePackageFixed in
Amazon Linux · 2 thunderbird 0:140.7.2-1.amzn2.0.1

Vulnerabilities 3

  • High 8.8
    CVE-2026-2447

    Heap buffer overflow in libvpx

    Heap buffer overflow in libvpx. This vulnerability was fixed in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • High 8.7
    CVE-2026-1837

    libjxl: Out-of-bounds write in grayscale color transformation when using LCMS2

    A specially-crafted file can cause libjxl's decoder to write pixel data to uninitialized unallocated memory. Soon after that data from another uninitialized unallocated region is copied to pixel data. This can be done by requesting color transformation of gra…

    Google libjxl jpeg-xl jpeg-xl Debian Ubuntu Alpine
  • Low 2.3
    CVE-2025-12474

    libjxl: Uninitialized memory read in decoder due to incorrect optimization in patch handling

    A specially-crafted file can cause libjxl's decoder to read pixel data from uninitialized (but allocated) memory. This can be done by causing the decoder to reference an outside-image-bound area in a subsequent patches. An incorrect optimization causes the de…

    Google libjxl graphicsmagick jpeg-xl Debian Ubuntu Alpine

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-12474.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-1837.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-2447.html