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Mallory
High

Out-of-bounds read in Apple GPU Drivers (macOS)

IdentifiersCVE-2026-20620CWE-125· Out-of-bounds Read

An out-of-bounds read vulnerability in Apple GPU Drivers, addressed by improved input validation. Successful exploitation may allow an attacker to trigger unexpected system termination or read kernel memory. The issue is fixed in macOS Sequoia 15.7.4, macOS Tahoe 26.3, and macOS Sonoma 14.8.4.

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For your environment

Are you exposed to this one?

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Denial of service via unexpected system termination and potential information disclosure via kernel memory read.

Mitigation

If you can’t patch tonight, do this now.

No vendor workaround is described in the provided content. Prioritize patch deployment on high-risk systems; until patched, reduce exposure by limiting execution of untrusted code and monitor for anomalous system/kernel crashes that may indicate attempted exploitation.

Remediation

Patch, then assume compromise.

Apply Apple security updates that include the fix: upgrade to macOS Sequoia 15.7.4, macOS Tahoe 26.3, or macOS Sonoma 14.8.4 (or later) as provided by Apple.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
AppleMacosoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity6

Community discussion across Reddit, Mastodon, and other social sources.