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AI made vulnerability discovery nearly free, breaking security's risk-acceptance model

Joel de la Garza of a16z argues that cheap AI-driven bug-hunting invalidates the risk-acceptance logic of security, yet rejects doom scenarios in favor of sustained patching and precautionary shutdowns.

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AI made vulnerability discovery nearly free, breaking security's risk-acceptance model

Recorded 24 October 2026 · 25 min

Joel de la Garza, a cybersecurity partner at a16z, argues that the security profession built its practices on an assumption AI has just broken: that finding vulnerabilities takes hundreds of hours of scarce expert labor. With agents making that work nearly free, long-dormant flaws in software such as PHP, BIND and the Linux kernel are surfacing, and he expects the wave to continue for 3 to 6 months.

The tension is between alarm and proportion. De la Garza calls the moment a genuinely big deal, yet says the industry is far better prepared than in the Heartbleed era and that doom scenarios are counterproductive. The hosts press him on hardware, critical infrastructure and the odds of real disruption. His answer is that disruption is likely, but mainly because defenders will switch systems off in order to fix them.

  1. Safe-rating logic collapses — ▶ 2:22

    The CISO role began at Citigroup after Russian hackers stole money, when systems were so insecure that a Telnet connection could yield root commands. Over time the job shifted toward accepting medium and low-severity risk, on the theory that exploiting flaws takes hundreds of hours of skilled labor, much as a safe is rated by hours-to-break-in. De la Garza says AI has pushed the cost of that knowledge work essentially to zero over 2-3 years. His forecast: 3-6 months of disclosures, with PHP, BIND, the Linux kernel and 4-5 embargoed issues already in view.

  2. Why disclosures cluster now — ▶ 4:47

    De la Garza attributes the burst less to a specific model than to a shifting threat landscape. Leaks and active exploitation, reportedly of the PHP flaw for a few weeks, pull disclosure timelines forward, and embargoed vendors are a common leak source. Many other flaws were silently patched over the prior 3-4 months. Attackers may be using open-weights models, and he notes Chinese ones have been very good at this for roughly 6-8 months, though he frames that as an assumption. Breach information also lags by days to years, so the true damage is unknown.

  3. Patching capacity for months — ▶ 7:21

    Since Heartbleed, which affected every website, appliance and even cars, the industry has built a patching cadence, and systems now run on images that can be updated in real time. De la Garza therefore thinks defenders are well prepared. The difficulty is duration. He has told portfolio founders to expect a couple of months of sustained effort: more security staff, allocated engineering time and zero tolerance for known vulnerabilities in shipped products. That ends the MVP habit of shipping with security bugs.

  4. Hardware's unpatchable tail — ▶ 10:03

    Nation-state activity moved toward hardware and firmware over roughly the last 15 years, after the Obama-era executive order naming Chinese intelligence officers. De la Garza says much critical infrastructure now has tooling to patch, with remote water systems and similar places the exceptions. The harder problem is low-capability devices such as heart rate monitors and wearables, which cannot practically be patched. He treats the damage from them as real but well short of taking down a grid control system. Whether that holds is untested.

  5. Doom framing undermines action — ▶ 13:28

    A host cites the 2003 Northeast blackout, which affected 55 million people and killed almost 100, and asks about harm to hospital patients. De la Garza, who lived through it, accepts the deaths as tragic but not apocalyptic, and argues that doom scenarios induce helplessness and weaken the case for change. He compares them to an asteroid strike: possible, but far out on the probability scale. The likelier outcomes are manageable with basic hygiene, funded security teams and not shipping products before they are ready. He offers no probability estimates.

  6. People remain the weak point — ▶ 19:03

    De la Garza cites Verizon's breach data as showing that 80-90% of incidents each year for 10 years began with social engineering or spear phishing, so people stay weaker than infrastructure. Pressed on whether AI weakens that logic by making direct system attacks viable, he partly concedes. Capabilities once held by nation-states with billion-dollar budgets have trickled down to ordinary ransomware operators. Low-hanging fruit should still be off the table if defenders use attackers' own tools and patch aggressively, but treating this as a one-week problem would be a mistake.

  7. Disruption through precaution — ▶ 21:29

    De la Garza calls real disruption in the next year almost certain, but mostly because governments and operators will shut systems off until they are patched, citing NSA advice and actions in the UK. His example is a DMV offline for a day or two. A SF grid outage over 12 hours he rates as low probability, while admitting he does not know grid security. For banks, he says those given early access to Glasswing 6-8 months ago have been patching for 6 months, and one bank is hiring an additional 1,000 people for it.

The open question. How far does the reassurance extend beyond the well-funded? De la Garza's confidence rests on large banks and big tech, while he concedes he lacks insight into grid security, that breach data arrives with a lag of days to years, and that regional, low-margin and unpatchable systems are the real risk. Whether these weak points produce serious harm, or only the managed outages he predicts, remains unknown.

Watch the full video at https://www.youtube.com/watch?v=caDHVdooOpo.

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