🛡️ CVE-2021-30934 on Debian — webkit2gtk

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

A buffer overflow issue was addressed with improved memory handling. 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.

Distribution advisory

This page covers CVE-2021-30934 as tracked by Debian, for the package webkit2gtk. The fix is available in version 2.34.4-1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

DEBIAN-CVE-2021-30934 is recorded against 2 packages.

webkit2gtk (fixed in 2.34.4-1)
wpewebkit (fixed in 2.34.4-1)

Timeline and source

Published on 24 August 2021 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

CVE-2021-30934 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Ubuntu

Details

Severity Unknown

CVSS Score N/A

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2021-08-24

Updated 2026-08-12

Modified 2026-08-04

Fix URL N/A

Affected Packages

Software	From version	Fixed in
webkit2gtk	—	2.34.4-1
wpewebkit	—	2.34.4-1

References

ADVISORY https://security-tracker.debian.org/tracker/CVE-2021-30934

🔗 NVD 🔗 Mitre

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