# CVE-2021-30952: webkit2gtk3: WebKitGTK is the port of the portable web rendering engine WebKit to the GTK platform. The following packages have b... CVE-2021-30952 is fixed in 11 products on 1 platform, first by gir1.2-javascriptcoregtk-4.0 2.34.4-0ubuntu0.20.04.1, released March 18, 2022. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on March 5, 2026. Patch Radar priority: Patch now. - Web page: https://patchblox.com/security/cve/CVE-2021-30952 - Priority: Patch now - CVSS: 8.8 (Moderate) - EPSS: 0.0696 - CISA KEV: listed Mar 5, 2026, federal due date Mar 26, 2026 - Exploited (vendor report): no - Publicly disclosed: no - Published: Jan 25, 2022 ## Description WebKitGTK is the port of the portable web rendering engine WebKit to the GTK platform. The following packages have been upgraded to a later upstream version: webkit2gtk3 (2.34.6). (BZ#1985042) Security Fix(es): * webkitgtk: maliciously crafted web content may lead to arbitrary code execution due to use after free (CVE-2022-22620) * webkitgtk: Use-after-free leading to arbitrary code execution (CVE-2021-30809) * webkitgtk: Type confusion issue leading to arbitrary code execution (CVE-2021-30818) * webkitgtk: Logic issue leading to HSTS bypass (CVE-2021-30823) * webkitgtk: Memory corruption issue leading to arbitrary code execution (CVE-2021-30846) * webkitgtk: Memory corruption issue leading to arbitrary code execution (CVE-2021-30848) * webkitgtk: Multiple memory corruption issue leading to arbitrary code execution (CVE-2021-30849) * webkitgtk: Memory corruption issue leading to arbitrary code execution (CVE-2021-30851) * webkitgtk: Logic issue leading to Content Security Policy bypass (CVE-2021-30887) * webkitgtk: Information leak via Content Security Policy reports (CVE-2021-30888) * webkitgtk: Buffer overflow leading to arbitrary code execution (CVE-2021-30889) * webkitgtk: Logic issue leading to universal cross-site scripting (CVE-2021-30890) * webkitgtk: Cross-origin data exfiltration via resource timing API (CVE-2021-30897) * webkitgtk: Processing maliciously crafted web content may lead to arbitrary code execution (CVE-2021-30934) * webkitgtk: Processing maliciously crafted web content may lead to arbitrary code execution (CVE-2021-30936) * webkitgtk: Processing maliciously crafted web content may lead to arbitrary code execution (CVE-2021-30951) * webkitgtk: Processing maliciously crafted web content may lead to arbitrary code execution (CVE-2021-30952) * webkitgtk: Processing maliciously crafted web content may lead to arbitrary code execution (CVE-2021-30953) * webkitgtk: Processing maliciously crafted web content may lead to arbitrary code execution (CVE-2021-30954) * webkitgtk: Processing maliciously crafted web content may lead to arbitrary code execution (CVE-2021-30984) * webkitgtk: Incorrect memory allocation in WebCore::ImageBufferCairoImageSurfaceBackend::create (CVE-2021-45481) * webkitgtk: use-after-free in WebCore::ContainerNode::firstChild (CVE-2021-45482) * webkitgtk: use-after-free in WebCore::Frame::page (CVE-2021-45483) * webkitgtk: Processing a maliciously crafted mail message may lead to running arbitrary javascript (CVE-2022-22589) * webkitgtk: Processing maliciously crafted web content may lead to arbitrary code execution (CVE-2022-22590) * webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced (CVE-2022-22592) * webkitgtk: A malicious website may exfiltrate data cross-origin (CVE-2022-22594) * webkitgtk: logic issue was addressed with improved state management (CVE-2022-22637) * webkitgtk: Out-of-bounds read leading to memory disclosure (CVE-2021-30836) * webkitgtk: CSS compositing issue leading to revealing of the browsing history (CVE-2021-30884) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.6 Release Notes linked from the References section. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | gir1.2-javascriptcoregtk-4.0 Ubuntu 20.04 LTS (focal) | 2.34.4-0ubuntu0.20.04.1 | [gir1.2-javascriptcoregtk-4.0 2.34.4-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gir1.2-javascriptcoregtk-4.0-2.34.4-0ubuntu0.20.04.1.md) | Mar 18, 2022 | | Linux | gir1.2-webkit2-4.0 Ubuntu 20.04 LTS (focal) | 2.34.4-0ubuntu0.20.04.1 | [gir1.2-webkit2-4.0 2.34.4-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gir1.2-webkit2-4.0-2.34.4-0ubuntu0.20.04.1.md) | Mar 18, 2022 | | Linux | libjavascriptcoregtk-4.0-18 Ubuntu 20.04 LTS (focal) | 2.34.4-0ubuntu0.20.04.1 | [libjavascriptcoregtk-4.0-18 2.34.4-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libjavascriptcoregtk-4.0-18-2.34.4-0ubuntu0.20.04.1.md) | Mar 18, 2022 | | Linux | libjavascriptcoregtk-4.0-bin Ubuntu 20.04 LTS (focal) | 2.34.4-0ubuntu0.20.04.1 | [libjavascriptcoregtk-4.0-bin 2.34.4-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libjavascriptcoregtk-4.0-bin-2.34.4-0ubuntu0.20.04.1.md) | Mar 18, 2022 | | Linux | libwebkit2gtk-4.0-37 Ubuntu 20.04 LTS (focal) | 2.34.4-0ubuntu0.20.04.1 | [libwebkit2gtk-4.0-37 2.34.4-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libwebkit2gtk-4.0-37-2.34.4-0ubuntu0.20.04.1.md) | Mar 18, 2022 | | Linux | libwebkit2gtk-4.0-37-gtk2 Ubuntu 20.04 LTS (focal) | 2.34.4-0ubuntu0.20.04.1 | [libwebkit2gtk-4.0-37-gtk2 2.34.4-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libwebkit2gtk-4.0-37-gtk2-2.34.4-0ubuntu0.20.04.1.md) | Mar 18, 2022 | | Linux | webkit2gtk-driver Ubuntu 20.04 LTS (focal) | 2.34.4-0ubuntu0.20.04.1 | [webkit2gtk-driver 2.34.4-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-webkit2gtk-driver-2.34.4-0ubuntu0.20.04.1.md) | Mar 18, 2022 | | Linux | webkit2gtk3 RHEL 8 | 0:2.34.6-1.el8 | [RHSA-2022:1777](https://patchblox.com/security/data/fix/linux/rhsa-2022-1777.md) | May 10, 2022 | | Linux | webkit2gtk3 almalinux 8 | 2.34.6-1.el8 | [ALSA-2022:1777](https://patchblox.com/security/data/fix/linux/alsa-2022-1777.md) | May 10, 2022 | | Linux | webkit2gtk3 ol 8 | 0:2.34.6-1.el8 | [ELSA-2022-1777](https://patchblox.com/security/data/fix/linux/elsa-2022-1777.md) | May 17, 2022 | | Linux | webkit2gtk3 rocky 8 | 0:2.34.6-1.el8 | [RLSA-2022:1777](https://patchblox.com/security/data/fix/linux/rlsa-2022-1777.md) | May 10, 2022 | | Linux | webkit2gtk3-devel RHEL 8 | 0:2.34.6-1.el8 | [RHSA-2022:1777](https://patchblox.com/security/data/fix/linux/rhsa-2022-1777.md) | May 10, 2022 | | Linux | webkit2gtk3-devel almalinux 8 | 2.34.6-1.el8 | [ALSA-2022:1777](https://patchblox.com/security/data/fix/linux/alsa-2022-1777.md) | May 10, 2022 | | Linux | webkit2gtk3-devel ol 8 | 0:2.34.6-1.el8 | [ELSA-2022-1777](https://patchblox.com/security/data/fix/linux/elsa-2022-1777.md) | May 17, 2022 | | Linux | webkit2gtk3-jsc RHEL 8 | 0:2.34.6-1.el8 | [RHSA-2022:1777](https://patchblox.com/security/data/fix/linux/rhsa-2022-1777.md) | May 10, 2022 | | Linux | webkit2gtk3-jsc almalinux 8 | 2.34.6-1.el8 | [ALSA-2022:1777](https://patchblox.com/security/data/fix/linux/alsa-2022-1777.md) | May 10, 2022 | | Linux | webkit2gtk3-jsc ol 8 | 0:2.34.6-1.el8 | [ELSA-2022-1777](https://patchblox.com/security/data/fix/linux/elsa-2022-1777.md) | May 17, 2022 | | Linux | webkit2gtk3-jsc-devel RHEL 8 | 0:2.34.6-1.el8 | [RHSA-2022:1777](https://patchblox.com/security/data/fix/linux/rhsa-2022-1777.md) | May 10, 2022 | | Linux | webkit2gtk3-jsc-devel almalinux 8 | 2.34.6-1.el8 | [ALSA-2022:1777](https://patchblox.com/security/data/fix/linux/alsa-2022-1777.md) | May 10, 2022 | | Linux | webkit2gtk3-jsc-devel ol 8 | 0:2.34.6-1.el8 | [ELSA-2022-1777](https://patchblox.com/security/data/fix/linux/elsa-2022-1777.md) | May 17, 2022 | --- Data as of 2026-11-08T13:06:02Z UTC. 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