ALAS2023-2025-1203

References: CVE-2025-10527  CVE-2025-10528  CVE-2025-10529  CVE-2025-10532  CVE-2025-10533  CVE-2025-10536  CVE-2025-10537  CVE-2025-59375 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

Sandbox escape due to use-after-free in the Graphics: Canvas2D component.

This vulnerability affects Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10527)

Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component.

This vulnerability affects Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10528)

Same-origin policy bypass in the Layout component.

This vulnerability affects Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10529)

Incorrect boundary conditions in the JavaScript: GC component.

This vulnerability affects Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10532)

Integer overflow in the SVG component.

This vulnerability affects Firefox < 143, Firefox ESR < 115.28, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10533)

Information disclosure in the Networking: Cache component.

This vulnerability affects Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10536)

Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142. 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 < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10537)

libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing. (CVE-2025-59375)

Issue Correction:
Run dnf update firefox --releasever 2023.9.20250929 or dnf update --advisory ALAS2023-2025-1203 --releasever 2023.9.20250929 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation

New Packages:

aarch64:
    firefox-debuginfo-140.3.0-1.amzn2023.0.1.aarch64
    firefox-140.3.0-1.amzn2023.0.1.aarch64
    firefox-debugsource-140.3.0-1.amzn2023.0.1.aarch64

src:
    firefox-140.3.0-1.amzn2023.0.1.src

x86_64:
    firefox-debuginfo-140.3.0-1.amzn2023.0.1.x86_64
    firefox-140.3.0-1.amzn2023.0.1.x86_64
    firefox-debugsource-140.3.0-1.amzn2023.0.1.x86_64