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Vulnerability details: VCID-p6v5-ca3v-hbcw
Vulnerability ID VCID-p6v5-ca3v-hbcw
Aliases CVE-2021-30951
Summary A use after free issue was addressed with improved memory management. 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.
Status Published
Exploitability 0.5
Weighted Severity 7.9
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
cvssv3 8.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30951.json
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01044 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01073 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
epss 0.01073 https://api.first.org/data/v1/epss?cve=CVE-2021-30951
cvssv3.1 8.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-30951
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-30951
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30951.json
https://api.first.org/data/v1/epss?cve=CVE-2021-30951
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30934
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30936
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30951
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30952
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30953
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30954
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30984
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22594
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22637
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/
https://support.apple.com/en-us/HT212975
https://support.apple.com/en-us/HT212978
https://support.apple.com/en-us/HT212980
https://support.apple.com/en-us/HT212982
https://www.debian.org/security/2022/dsa-5060
https://www.debian.org/security/2022/dsa-5061
http://www.openwall.com/lists/oss-security/2022/01/21/2
2044534 https://bugzilla.redhat.com/show_bug.cgi?id=2044534
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
CVE-2021-30951 https://nvd.nist.gov/vuln/detail/CVE-2021-30951
RHSA-2022:1777 https://access.redhat.com/errata/RHSA-2022:1777
RHSA-2025:10364 https://access.redhat.com/errata/RHSA-2025:10364
USN-5255-1 https://usn.ubuntu.com/5255-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30951.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30951
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30951
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.76577
EPSS Score 0.01044
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:44:02.329222+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/5255-1/ 37.0.0