CVE-2021-30795: apple ios Use After Free
CVSS: 9.3v2.0HighModified
AliasesUBUNTU-CVE-2021-30795DEBIAN-CVE-2021-30795
Published 08-09-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-30795 is a high (CVSS 9.3) Use After Free vulnerability in apple ios. EPSS estimates a 2.22% chance of exploitation in the next 30 days, higher than 82.3% of scored vulnerabilities.
CVSS score
9.3/10
010
High · v2.0 (NVD)EPSS score
2.22%
0%100%
Low · +0.08 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 6Timeline
- 08-09-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.7, Safari 14.1.2, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7. Processing maliciously crafted web content may lead to arbitrary code execution.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 8.8Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
High 9.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
2.22%
Chance of exploitation in the next 30 days
Percentile
82%
Versus all other CVEs
30-day change
+0.08 pp
From 2.14% on 18-09-2026
18-09-202618-10-2026
EPSS score2.22%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Apple6 products
- ios≥ unspecified, < 14.7
- iphone_os< 14.7
- macos≥ unspecified, < 11.5 | ≥ unspecified, < 14.7 | ≥ unspecified, < 7.6 | ≥ unspecified, < 14.1 | ≥ 11.0, < 11.5
- safari< 14.1.2
- tvos< 14.7
Ubuntu5 products
- qtwebkit-opensource-srcAll versions (No fix recorded)
- qtwebkit-sourceAll versions (No fix recorded)
- webkit2gtkAll versions (No fix recorded) | < 2.32.3-0ubuntu0.18.04.1 | < 2.32.3-0ubuntu0.20.04.1
- webkitgtkAll versions (No fix recorded)
- wpewebkitAll versions (No fix recorded)
Debian2 products
- webkit2gtk< 2.32.3-1
- wpewebkit< 2.32.3-1
3 vendors · 13 products
