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Vulnerability details: VCID-3zfd-ewdg-1ue4
Vulnerability ID VCID-3zfd-ewdg-1ue4
Aliases CVE-2021-42762
Summary BubblewrapLauncher.cpp in WebKitGTK and WPE WebKit before 2.34.1 allows a limited sandbox bypass that allows a sandboxed process to trick host processes into thinking the sandboxed process is not confined by the sandbox, by abusing VFS syscalls that manipulate its filesystem namespace. The impact is limited to host services that create UNIX sockets that WebKit mounts inside its sandbox, and the sandboxed process remains otherwise confined. NOTE: this is similar to CVE-2021-41133.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-20 Improper Input Validation
System Score Found at
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-42762.json
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2021-42762
cvssv3.1 8.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.6 https://nvd.nist.gov/vuln/detail/CVE-2021-42762
cvssv3.1 5.3 https://nvd.nist.gov/vuln/detail/CVE-2021-42762
archlinux Medium https://security.archlinux.org/AVG-2483
archlinux Medium https://security.archlinux.org/AVG-2484
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-42762.json
https://api.first.org/data/v1/epss?cve=CVE-2021-42762
https://bugs.webkit.org/show_bug.cgi?id=231479
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30818
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30823
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30846
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30851
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30884
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30888
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30889
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42762
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45481
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45483
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M5J2LZQTDX53DNSKSGU7TQYCO2HKSTY4/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/
https://www.debian.org/security/2021/dsa-4995
https://www.debian.org/security/2021/dsa-4996
2016673 https://bugzilla.redhat.com/show_bug.cgi?id=2016673
ASA-202110-10 https://security.archlinux.org/ASA-202110-10
ASA-202110-9 https://security.archlinux.org/ASA-202110-9
AVG-2483 https://security.archlinux.org/AVG-2483
AVG-2484 https://security.archlinux.org/AVG-2484
cpe:2.3:a:webkitgtk:webkitgtk:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:webkitgtk:webkitgtk:*:*:*:*:*:*:*:*
cpe:2.3:a:wpewebkit:wpe_webkit:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:wpewebkit:wpe_webkit:*:*:*:*:*:*:*:*
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:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
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-2021-42762 https://nvd.nist.gov/vuln/detail/CVE-2021-42762
RHSA-2025:10364 https://access.redhat.com/errata/RHSA-2025:10364
USN-5127-1 https://usn.ubuntu.com/5127-1/
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-42762.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:L/AC:L/PR:L/UI:N/S:C/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:L/AC:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-42762
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:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Found at https://nvd.nist.gov/vuln/detail/CVE-2021-42762
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 0.00625
EPSS Score 9e-05
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:28:51.064681+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.17/community.json 37.0.0