Log Message:
firefox115: update to 115.20.0 (security)

Security Vulnerabilities fixed in Firefox ESR 115.20

#CVE-2025-1009: Use-after-free in XSLT

Impact: high

An attacker could have caused a use-after-free via crafted XSLT data, leading
to a potentially exploitable crash.

#CVE-2025-1010: Use-after-free in Custom Highlight

Impact: high

An attacker could have caused a use-after-free via the Custom Highlight API,
leading to a potentially exploitable crash.

#CVE-2025-1012: Use-after-free during concurrent delazification

Impact: moderate

A race during concurrent delazification could have led to a use-after-free.

#CVE-2025-1016: Memory safety bugs fixed in Firefox 135, Thunderbird 135,
Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 115.20, and Thunderbird
128.7

Impact: high

Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 115.19,
Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6. 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.