CVE intelligence and bounded remediation
CVE-2023-6861 — The `nsWindow::PickerOpen(void)` method was susceptible to a heap buffer overflow when running in headless mode
High
CVSS 8.8
The `nsWindow::PickerOpen(void)` method was susceptible to a heap buffer overflow when running in headless mode. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.
- Severity
- High
- CVSS
- 8.8 (3.1)
- Published
- 2023-12-19
- CISA KEV
- Not currently listed
- Ecosystem
- browser
- Weaknesses
- CWE-787
Affected products
- mozilla / firefox
- mozilla / firefox_esr
- mozilla / thunderbird
- debian / debian_linux / 10.0
- debian / debian_linux / 11.0
- debian / debian_linux / 12.0
Matched remediation archetype
Buffer bounds, memory safety, and memory corruption
This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.
Check exposure
- Identify affected native-code versions, build flags, architectures, parsers, codecs, drivers, and input paths in all shipped artifacts.
- Determine whether untrusted data reaches the affected routine and the process privilege, sandbox, and network exposure.
- Confirm statically linked, vendored, firmware, and platform-provided copies, not only package-manager records.
Remediate safely
- Apply the maintained upstream correction or replace the affected component, then rebuild every dependent artifact from clean inputs.
- Adopt bounds-checked interfaces, validated sizes and integer conversions, clear ownership, and memory-safe components where practical.
- Enable supported compiler and runtime hardening and add sanitized tests and fuzz regression seeds derived from non-weaponized fixtures.
Authoritative sources
Complete CVE record and remediation plan
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