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CVE-2021-1788

HIGH
8.8
CVSS Score
Published: April 2, 2021 at 06:00 PM UTC
Updated: June 17, 2026 at 03:32 AM UTC
8 products affected across 3 vendorsmacOSDebian LinuxFedora

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Severity
HIGH8.8
Exploit prediction
EPSS 2%

Description

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

iPadOS· Apple
95%
v < 14.4
Affected range stops below 14.4, so it looks safe — our inference, not a vendor statement
iPhone OS· Apple
95%
v < 14.4
Affected range stops below 14.4, so it looks safe — our inference, not a vendor statement
macOS· Apple
95%
v < 11.2v < 14.0v < 14.4v < 7.310.14 ≤ v < 10.14.610.15 ≤ v < 10.15.711.0 ≤ v < 11.210.14.610.14.6 security_update_2019-00410.14.6 security_update_2019-00510.14.6 security_update_2019-00610.14.6 security_update_2019-00710.14.6 security_update_2020-00110.14.6 security_update_2020-00210.14.6 security_update_2020-00310.14.6 security_update_2020-00410.14.6 security_update_2020-00510.14.6 security_update_2020-00610.14.6 security_update_2020-00710.14.6 supplemental_update10.14.6 supplemental_update_210.15.710.15.7 supplemental_update
Affected range stops below 10.14.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.15.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 11.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 14.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 14.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.3, so it looks safe — our inference, not a vendor statement
Safari· Apple
95%
v < 14.0.3
Affected range stops below 14.0.3, so it looks safe — our inference, not a vendor statement
tvOS· Apple
95%
v < 14.4
Affected range stops below 14.4, so it looks safe — our inference, not a vendor statement
watchOS· Apple
95%
v < 7.3
Affected range stops below 7.3, so it looks safe — our inference, not a vendor statement
Debian Linux· Debiandrupal
95%
10.0
Fedora· Fedora Projectrpm
95%
33

References (7)

Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://support.apple.com/en-us/HT212146
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://support.apple.com/en-us/HT212147
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://support.apple.com/en-us/HT212148
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://support.apple.com/en-us/HT212149
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://support.apple.com/en-us/HT212152
Vendor Advisoryx_refsource_DEBIANThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2021/dsa-4923

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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