CVE-2024-40854

A memory initialization issue was addressed with improved memory handling. This issue is fixed in iOS 17.7.1 and iPadOS 17.7.1, iOS 18.1 and iPadOS 18.1, macOS Sequoia 15.1, macOS Sonoma 14.7.1, macOS Ventura 13.7.1. An app may be able to cause unexpected system termination.

Published: 2025-01-15 Last update: 2026-04-02 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-40854 is rated Moderate Risk (40.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.31%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-40854

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-21 0.24% 0.31% +0.07%
2 2026-02-24 0.31% 0.24% -0.07%
3 2026-02-23 — 0.31% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-40854

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-40854

Affected software / configurations for CVE-2024-40854

Vendor Product Version Raw CPE
apple ipados < 17.7.1 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple ipados >= 18.0, < 18.1 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone_os < 17.7.1 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple iphone_os >= 18.0, < 18.1 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple macos < 13.7.1 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos >= 14.0, < 14.7.1 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

References for CVE-2024-40854

URL Tags
https://support.apple.com/en-us/121563 Release Notes Vendor Advisory
https://support.apple.com/en-us/121564
https://support.apple.com/en-us/121567 Release Notes Vendor Advisory
https://support.apple.com/en-us/121568 Release Notes Vendor Advisory
https://support.apple.com/en-us/121570 Release Notes Vendor Advisory
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