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CVE-2021-42762

MEDIUM
5.3
CVSS Score
Published: October 20, 2021 at 06:15 PM UTC
Updated: June 17, 2026 at 04:10 AM UTC
4 products affected across 4 vendorsDebian LinuxFedoraWebKitGTK

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.5%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.011.0
Fedora· Fedora Projectrpm
95%
333435
WebKitGTK· Webkitgtk
95%
v < 2.34.1
Affected range stops below 2.34.1, so it looks safe — our inference, not a vendor statement
Wpewebkit· Wpewebkit
95%
v < 2.34.1
Affected range stops below 2.34.1, so it looks safe — our inference, not a vendor statement

References (11)

Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/10/26/9
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/10/27/1
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/10/27/2
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/10/27/4
x_refsource_MISCExploitIssue TrackingVendor Advisory
Source: [email protected]
https://bugs.webkit.org/show_bug.cgi?id=231479
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M5J2LZQTDX53DNSKSGU7TQYCO2HKSTY4/

CVSS

5.3MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-Other

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