CVE-2026-12308
Description
Memory safety bug in Firefox before 152 and ESR before 140.12, fixed in the latest releases.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Memory safety bug in Firefox before 152 and ESR before 140.12, fixed in the latest releases.
Vulnerability
CVE-2026-12308 is a memory safety bug present in Firefox before version 152 and Firefox ESR before version 140.12 [1][2]. The exact nature of the bug is not disclosed in the public advisories, but it falls under the category of memory safety vulnerabilities that can lead to memory corruption.
Exploitation
Public details are limited; exploitation typically requires an attacker to craft malicious content (e.g., a specially crafted webpage) that triggers the memory safety issue when processed by the browser. No authentication or special network position is required beyond visiting the malicious content.
Impact
Successful exploitation could lead to memory corruption, potentially allowing an attacker to execute arbitrary code in the context of the browser process. The impact is rated high by Mozilla [1][2].
Mitigation
The vulnerability is fixed in Firefox 152 and Firefox ESR 140.12, both released on June 16, 2026 [1][2]. Users should update to these versions immediately. No workarounds have been provided.
AI Insight generated on Jun 16, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2- Range: < 152, <= 140.12
- Range: <= 140.12, < 152
Patches
0No patches discovered yet.
Vulnerability mechanics
No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.
References
5News mentions
0No linked articles in our index yet.