CVE-2024-27834Known exploitationNetwork attack vector

Code execution via unprotected libpas data pointers

Published May 13, 2024 · Updated Apr 2, 2026

Pointer Authentication bypass in Apple WebKit allows remote attackers to execute code by opening crafted web content. The libpas allocator fails to protect data pointers, allowing corrupted pointers to pass the control-flow integrity check. Exploitation requires user interaction and a separate primitive that provides arbitrary memory read and write access.

CVSS severity5.5
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Pointer Authentication bypass in Apple WebKit allows remote attackers to execute code by opening crafted web content. The libpas allocator fails to protect data pointers, allowing corrupted pointers to pass the control-flow integrity check. Exploitation requires user interaction and a separate primitive that provides arbitrary memory read and write access.

The record

CVE
CVE-2024-27834
Published
May 13, 2024
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS
Classifications
CWE-277, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <17.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOSversion=0 <17.5
Apple · iOS and iPadOSversion=0 <16.7.8; version=0 <17.5
Apple · Safariversion=0 <17.5
Apple · tvOSversion=0 <17.5
Apple · macOSversion=0 <14.5
Apple · iPadOSversion=0 <17.5
Apple · watchOSversion=0 <10.5

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-277Insecure Inherited Permissions
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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