CVE-2021-30953: apple ios and ipados Out-of-bounds Read
CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2021-30953DEBIAN-CVE-2021-30953
Published 24-08-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-30953 is a high (CVSS 8.8) Out-of-bounds Read vulnerability in apple ios and ipados. EPSS estimates a 1.95% chance of exploitation in the next 30 days, higher than 79.9% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (NVD)EPSS score
1.95%
0%100%
Low · +0.03 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 10 · Related 5Timeline
- 24-08-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 8.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.95%
Chance of exploitation in the next 30 days
Percentile
80%
Versus all other CVEs
30-day change
+0.03 pp
From 1.92% on 18-09-2026
18-09-202618-10-2026
EPSS score1.95%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Apple7 products
- ios and ipados≥ unspecified, < 15.2
- ipados< 15.2
- iphone_os< 15.2
- macos≥ unspecified, < 12.1 | ≥ unspecified, < 15.2 | ≥ 12.0.0, ≤ 12.1
- safari< 15.2
Ubuntu5 products
- qtwebkit-opensource-srcAll versions (No fix recorded)
- qtwebkit-sourceAll versions (No fix recorded)
- webkit2gtkAll versions (No fix recorded) | < 2.34.4-0ubuntu0.20.04.1
- webkitgtkAll versions (No fix recorded)
- wpewebkitAll versions (No fix recorded)
Debian3 products
- webkit2gtk< 2.34.4-1
- wpewebkit< 2.34.4-1
- debian_linuxEOL10.0 | 11.0
Fedoraproject1 product
- fedoraEOL34 | 35
4 vendors · 16 products
References
15 links- support.apple.com/en-us/HT212975X Refsource MISC
- support.apple.com/en-us/HT212976X Refsource MISC
- support.apple.com/en-us/HT212978X Refsource MISC
- support.apple.com/en-us/HT212980X Refsource MISC
- support.apple.com/en-us/HT212982X Refsource MISC
