Firefox 159 fixes 167 flaws, and OpenAI's Codex found 41 of them

Mozilla began rolling out Firefox 159 for Windows, macOS, Linux and Android on Oct. 27. According to the security advisory for Firefox 159, the release fixes 167 vulnerabilities. Mozilla rates 108 of them high, 52 moderate and 7 low. None is rated critical, and the advisory does not report any active exploitation. Mozilla credits 34 of the entries to OpenAI Codex Security, the security agent OpenAI launched as a research preview in March. OpenAI researcher Amy Burnett reported 7 more, which brings OpenAI's share to 41 of the 167 fixes. Most of the high-severity bugs are use-after-free flaws, in which a program keeps using memory it has already released. In the worst case, attackers can use such a bug to run malicious code.