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TI-2021-01549 Aliases CVE-2021-1841GHSA-3c2m-gxqv-2jrx

Out-of-bounds write in Apple macOS

Priority LOW 37CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

A malicious application may be able to execute arbitrary code with kernel privileges. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina. An out-of-bounds write issue was addressed with improved bounds checking.

Why it matters now

EPSS 0.01289 70th percentileScored 2026-11-07
Fix Fixed macOS (Apple): 11.3, 2021

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApplemacOSbefore 11.311.3Patch availableCNA
ApplemacOSbefore 20212021Patch availableCNA
  • macOS VendorApple Affected before 11.3 Fixed in 11.3 Patch available CNA
  • macOS VendorApple Affected before 2021 Fixed in 2021 Patch available CNA

CPE configurations NVD · 42

CPEVersionsRoleVendor
cpe:2.3:o:apple:mac_os_x:10.14:*:*:*:*:*:*:*10.14VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.0:*:*:*:*:*:*:*10.14.0VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.1:*:*:*:*:*:*:*10.14.1VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.2:*:*:*:*:*:*:*10.14.2VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.3:*:*:*:*:*:*:*10.14.3VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.4:*:*:*:*:*:*:*10.14.4VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.4:beta4:*:*:*:*:*:*10.14.4 beta4VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.5:*:*:*:*:*:*:*10.14.5VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:*:*:*:*:*:*:*10.14.6VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:-:*:*:*:*:*:*10.14.6VulnerableApple
  • cpe:2.3:o:apple:mac_os_x:10.14:*:*:*:*:*:*:* Versions 10.14 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.0:*:*:*:*:*:*:* Versions 10.14.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.1:*:*:*:*:*:*:* Versions 10.14.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.2:*:*:*:*:*:*:* Versions 10.14.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.3:*:*:*:*:*:*:* Versions 10.14.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.4:*:*:*:*:*:*:* Versions 10.14.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.4:beta4:*:*:*:*:*:* Versions 10.14.4 beta4 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.5:*:*:*:*:*:*:* Versions 10.14.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:*:*:*:*:*:*:* Versions 10.14.6 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:-:*:*:*:*:*:* Versions 10.14.6 Vulnerable ·Apple
Show 32 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-001:*:*:*:*:*:*10.14.6 security_update_2019-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-002:*:*:*:*:*:*10.14.6 security_update_2019-002VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-004:*:*:*:*:*:*10.14.6 security_update_2019-004VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-005:*:*:*:*:*:*10.14.6 security_update_2019-005VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-006:*:*:*:*:*:*10.14.6 security_update_2019-006VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-007:*:*:*:*:*:*10.14.6 security_update_2019-007VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-001:*:*:*:*:*:*10.14.6 security_update_2020-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-002:*:*:*:*:*:*10.14.6 security_update_2020-002VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-003:*:*:*:*:*:*10.14.6 security_update_2020-003VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-004:*:*:*:*:*:*10.14.6 security_update_2020-004VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-005:*:*:*:*:*:*10.14.6 security_update_2020-005VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-006:*:*:*:*:*:*10.14.6 security_update_2020-006VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-007:*:*:*:*:*:*10.14.6 security_update_2020-007VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2021-001:*:*:*:*:*:*10.14.6 security_update_2021-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2021-002:*:*:*:*:*:*10.14.6 security_update_2021-002VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15:*:*:*:*:*:*:*10.15VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.1:*:*:*:*:*:*:*10.15.1VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.2:*:*:*:*:*:*:*10.15.2VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.3:*:*:*:*:*:*:*10.15.3VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.4:*:*:*:*:*:*:*10.15.4VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.5:*:*:*:*:*:*:*10.15.5VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.6:*:*:*:*:*:*:*10.15.6VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.6:-:*:*:*:*:*:*10.15.6VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.6:supplemental_update:*:*:*:*:*:*10.15.6 supplemental_updateVulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:*:*:*:*:*:*:*10.15.7VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*10.15.7VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:*10.15.7 security_update_2020VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*10.15.7 security_update_2020-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-005:*:*:*:*:*:*10.15.7 security_update_2020-005VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-007:*:*:*:*:*:*10.15.7 security_update_2020-007VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*10.15.7 security_update_2021-001VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*11.0 to before 11.3VulnerableApple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-001:*:*:*:*:*:* Versions 10.14.6 security_update_2019-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-002:*:*:*:*:*:* Versions 10.14.6 security_update_2019-002 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-004:*:*:*:*:*:* Versions 10.14.6 security_update_2019-004 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-005:*:*:*:*:*:* Versions 10.14.6 security_update_2019-005 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-006:*:*:*:*:*:* Versions 10.14.6 security_update_2019-006 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-007:*:*:*:*:*:* Versions 10.14.6 security_update_2019-007 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-001:*:*:*:*:*:* Versions 10.14.6 security_update_2020-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-002:*:*:*:*:*:* Versions 10.14.6 security_update_2020-002 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-003:*:*:*:*:*:* Versions 10.14.6 security_update_2020-003 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-004:*:*:*:*:*:* Versions 10.14.6 security_update_2020-004 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-005:*:*:*:*:*:* Versions 10.14.6 security_update_2020-005 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-006:*:*:*:*:*:* Versions 10.14.6 security_update_2020-006 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-007:*:*:*:*:*:* Versions 10.14.6 security_update_2020-007 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2021-001:*:*:*:*:*:* Versions 10.14.6 security_update_2021-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2021-002:*:*:*:*:*:* Versions 10.14.6 security_update_2021-002 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15:*:*:*:*:*:*:* Versions 10.15 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.1:*:*:*:*:*:*:* Versions 10.15.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.2:*:*:*:*:*:*:* Versions 10.15.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.3:*:*:*:*:*:*:* Versions 10.15.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.4:*:*:*:*:*:*:* Versions 10.15.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.5:*:*:*:*:*:*:* Versions 10.15.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.6:*:*:*:*:*:*:* Versions 10.15.6 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.6:-:*:*:*:*:*:* Versions 10.15.6 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.6:supplemental_update:*:*:*:*:*:* Versions 10.15.6 supplemental_update Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:*:*:*:*:*:*:* Versions 10.15.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:* Versions 10.15.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:* Versions 10.15.7 security_update_2020 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:* Versions 10.15.7 security_update_2020-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-005:*:*:*:*:*:* Versions 10.15.7 security_update_2020-005 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-007:*:*:*:*:*:* Versions 10.15.7 security_update_2020-007 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:* Versions 10.15.7 security_update_2021-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.3 Vulnerable ·Apple

Remediation

  • Fix · CNA macOS (Apple) Fixed in 11.3
  • Fix · CNA macOS (Apple) Fixed in 2021

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apple macOS 2021

    100 records Highest priority Priority HIGH 1 HIGH, 12 MEDIUM, 87 LOW

    Other records, highest priority first

    • TI-2021-11042 Missing authorization in Apple macOSPriority HIGH 82
    • TI-2021-11104 Apple macOS: An attacker in a privileged network position may be able to leak sensitive…Priority MEDIUM 50
    • TI-2021-11181 Out-of-bounds write in Apple Security Update - CatalinaPriority MEDIUM 48
    Show all 100 records →
  • Release ·

    Apple macOS 11.3

    62 records Highest priority Priority CRITICAL 3 CRITICAL, 1 HIGH, 9 MEDIUM, 49 LOW

    Other records, highest priority first

    • TI-2021-11050 Out-of-bounds write in Apple macOSPriority CRITICAL 97
    • TI-2021-11048 Integer overflow in Apple macOSPriority CRITICAL 97
    • TI-2021-11046 Use after free in Apple iOS and iPadOSPriority CRITICAL 97
    Show all 62 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-1841
  2. 2026-10-03 Alias added: GHSA-3c2m-gxqv-2jrx

References

Advisory 2

  • TI-2021-01573 Apple iOS and iPadOS: A remote attacker may be able to cause arbitrary code execution KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-01572 Apple iOS and iPadOS: A remote attacker may be able to cause arbitrary code execution KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2012-01607 sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI… KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-02117 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3209 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences