Critical

Memory corruption in Apple WebKit

IdentifiersCVE-2024-54534CWE-119

CVE-2024-54534 is a WebKit memory-safety vulnerability affecting Apple platforms including Safari, iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. Apple states that processing maliciously crafted web content may lead to memory corruption. The issue was addressed through improved memory handling, indicating a flaw in WebKit’s handling of attacker-controlled web content that can corrupt memory during content processing.

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 an attacker to trigger memory corruption in the context of WebKit by luring a target into processing malicious web content. Depending on exploitability, memory corruption in a browser engine can result in application instability or crashes and may create conditions for further compromise, including potential code execution, although Apple’s published description for this CVE specifically states memory corruption rather than confirmed arbitrary code execution.

Mitigation

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

Until patches are applied, reduce exposure to untrusted web content, especially in Safari and applications embedding WebKit. Limit browsing to trusted sites where feasible and use defense-in-depth controls such as application isolation and least-privilege user contexts. No vendor workaround beyond installing the fixed versions is identified.

Remediation

Patch, then assume compromise.

Apply Apple’s security updates that fix CVE-2024-54534. Apple indicates the issue is fixed in Safari 18.2, iOS 18.2, iPadOS 18.2, iPadOS 17.7.6, macOS Sequoia 15.2, tvOS 18.2, visionOS 2.2, and watchOS 11.2.

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

AppleMacosoperating_system

AppleSafariapplication

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.

5 SOURCESView more in app

apple supportNews

Jan 25, 2026

About the security content of iOS 18.2 and iPadOS 18.2 - Apple Support

Unknown

apple supportNews

Jan 25, 2026

About the security content of visionOS 2.2 - Apple Support

A specific Apple Vision Pro vulnerability is referenced by CVE ID, but the provided content does not include impact/description details.

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.

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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 activity1

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

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2024-54534

NVD

nvd.nist.gov/vuln/detail/CVE-2024-54534

MITRE CWE · CWE-119

cwe.mitre.org

Vendor Advisory

support.apple.com/en-us/121837

Vendor Advisory

support.apple.com/en-us/121839

Vendor Advisory

support.apple.com/en-us/121843

Vendor Advisory

support.apple.com/en-us/121844

Vendor Advisory

support.apple.com/en-us/121845

Vendor Advisory

support.apple.com/en-us/121846

seclists.org

seclists.org/fulldisclosure/2024/Dec/11

seclists.org

seclists.org/fulldisclosure/2024/Dec/13

seclists.org

seclists.org/fulldisclosure/2024/Dec/5

+4 more references

view more in app

Memory corruption in Apple WebKit

IdentifiersCVE-2024-54534CWE-119