A timing side-channel issue was addressed with improvements to constant-time computation in cryptographic functions. This issue is fixed…

Description

A timing side-channel issue was addressed with improvements to constant-time computation in cryptographic functions. This issue is fixed in iOS 16.7.6 and iPadOS 16.7.6, iOS 17.3 and iPadOS 17.3, macOS Monterey 12.7.4, macOS Sonoma 14.3, macOS Ventura 13.6.5, tvOS 17.3, watchOS 10.3. An attacker may be able to decrypt legacy RSA PKCS#1 v1.5 ciphertexts without having the private key.

Scores

EPSS (exploitation in 30 days)

0.99% · top 37% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.

Weakness

• An attacker may be able to decrypt legacy RSA PKCS#1 v1.5 ciphertexts without having the private key
• CWE-203 Observable Discrepancy (opens in a new tab)All about CWE-203 and its CVEs

Affected products

• Apple · iOS and iPadOS

  • affected < 16.7.6
  • affected < 17.3

• Apple · macOS

  • affected < 12.7.4
  • affected < 13.6.5
  • affected < 14.3

• Apple · tvOS

  • affected < 17.3

• Apple · watchOS

  • affected < 10.3

References (23)

• https://support.apple.com/en-us/120304 (opens in a new tab)
• https://support.apple.com/en-us/120306 (opens in a new tab)
• https://support.apple.com/en-us/120309 (opens in a new tab)
• https://support.apple.com/en-us/120311 (opens in a new tab)
• https://support.apple.com/en-us/120880 (opens in a new tab)
• https://support.apple.com/en-us/120884 (opens in a new tab)
• https://support.apple.com/en-us/120886 (opens in a new tab)
• https://support.apple.com/en-us/HT214059 (opens in a new tab)x_transferred
• https://support.apple.com/en-us/HT214055 (opens in a new tab)x_transferred
• https://support.apple.com/en-us/HT214060 (opens in a new tab)x_transferred
• https://support.apple.com/en-us/HT214061 (opens in a new tab)x_transferred
• http://seclists.org/fulldisclosure/2024/Jan/33 (opens in a new tab)x_transferred
• http://seclists.org/fulldisclosure/2024/Jan/36 (opens in a new tab)x_transferred
• http://seclists.org/fulldisclosure/2024/Jan/39 (opens in a new tab)x_transferred
• http://seclists.org/fulldisclosure/2024/Jan/40 (opens in a new tab)x_transferred
• https://support.apple.com/kb/HT214082 (opens in a new tab)x_transferred
• https://support.apple.com/kb/HT214083 (opens in a new tab)x_transferred
• https://support.apple.com/kb/HT214085 (opens in a new tab)x_transferred
• http://seclists.org/fulldisclosure/2024/Mar/22 (opens in a new tab)x_transferred
• http://seclists.org/fulldisclosure/2024/Mar/23 (opens in a new tab)x_transferred
• https://support.apple.com/kb/HT214061 (opens in a new tab)
• https://support.apple.com/kb/HT214059 (opens in a new tab)
• https://support.apple.com/kb/HT214055 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2024-23218](https://trackcve.app/badge/CVE-2024-23218.svg)](https://trackcve.app/cve/CVE-2024-23218)

Record last updated 2 Apr 2026, 18:26 UTC.