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Mallory
Medium

ASLR bypass via out-of-bounds access in Apple operating systems

IdentifiersCVE-2025-43205CWE-125· Out-of-bounds Read

CVE-2025-43205 is an out-of-bounds access vulnerability in Apple platforms, fixed in watchOS 11.4, tvOS 18.4, visionOS 2.4, iOS 18.4, and iPadOS 18.4. Apple states that an app may be able to bypass ASLR as a result of this flaw, and that the issue was addressed with improved bounds checking. Based on the available information, the vulnerability involves improper validation of memory access boundaries that can permit access outside the intended buffer or object bounds, enabling disclosure of memory layout information useful for defeating address space randomization.

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For your environment

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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.

Successful exploitation may allow a malicious app to bypass ASLR protections on the affected device. Defeating ASLR can reduce the effectiveness of a key exploit mitigation and make other memory-corruption vulnerabilities more reliable to exploit by revealing or inferring memory layout information. The provided information does not state that this issue alone yields code execution or privilege escalation.

Mitigation

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

If immediate patching is not possible, reduce exposure by limiting installation and execution of untrusted or unnecessary applications, enforcing application control and mobile device management policies where available, and prioritizing update deployment on devices that permit third-party app installation. No vendor-specific workaround beyond installing the fixed releases is provided in the available content.

Remediation

Patch, then assume compromise.

Apply the vendor fixes in watchOS 11.4, tvOS 18.4, visionOS 2.4, iOS 18.4, or iPadOS 18.4, as appropriate. Apple indicates the issue was remediated through improved bounds checking.
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
AppleIpadosoperating_system
AppleIphone Osoperating_system
AppleTvosoperating_system
AppleVisionosoperating_system
AppleWatchosoperating_system

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

ACTIVITY FEED

Recent activity

5 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 activity4

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