CVE-2020-9958 - An out-of-bounds write issue was addressed with improved bounds checking

Back Back to CVE browser

HIGH

An out-of-bounds write issue was addressed with improved bounds checking

Published Oct 16, 2020

7.8

HIGH

CVSS 3.1

EPSS 1.13%

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.0 and iPadOS 14.0. An application may be able to cause unexpected system termination or write kernel memory.

Affected products

Vendor Apple Product iOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <iOS 14.0 and iPadOS 14.0

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Apple

iOS

n/a

Version	Status	Constraints
unspecified	affected	<iOS 14.0 and iPadOS 14.0

Remediation

No remediation recorded yet.

Metrics

1.13% 0.01131

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 4, 2026.

EPSS probability 0.01131

Score over time

2021-2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (9 key points)

Flat stretches are collapsed. Showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 4, 2026	1.13% (0.01131)	65.27th	v5 (v2026.06.15)
Sep 20, 2026	1.13% (0.01131)	64.97th	v5 (v2026.06.15)
Jul 20, 2024	0.07% (0.00070)	30.82th	v3 (v2023.03.01)
May 4, 2024	0.07% (0.00070)	29.63th	v3 (v2023.03.01)
Mar 7, 2023	0.07% (0.00068)	27.62th	v3 (v2023.03.01)
Mar 6, 2023	1.40% (0.01404)	72.10th	v2 (v2022.01.01)
Feb 4, 2022	1.40% (0.01404)	49.02th	v2 (v2022.01.01)
Feb 3, 2022	0.41% (0.00410)	3.56th	v5 (v2026.06.15)
Apr 14, 2021	0.41% (0.00410)	0.00th	v1

Weaknesses (1)

CWE-787

Out-of-bounds Write

References (2)

http://seclists.org/fulldisclosure/2020/Nov/20
mailing-listx_refsource_FULLDISCMailing ListThird Party Advisory
https://support.apple.com/HT211850
x_refsource_MISCRelease NotesVendor Advisory

Link	Providers	Tags
http://seclists.org/fulldisclosure/2020/Nov/20		mailing-listx_refsource_FULLDISCMailing ListThird Party Advisory
https://support.apple.com/HT211850		x_refsource_MISCRelease NotesVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner apple

Published Oct 16, 2020

Updated Aug 4, 2024

Reserved Mar 2, 2020

Link CVE-2020-9958

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2020-9958

Red Hat

Severity n/a

Public date n/a

Links CVE-2020-9958