Description
Double free in ICU in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Chrome | unspecified – < 91.0.4472.77 | 91.0.4472.77 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | chromium | 93.0.4577.82-1 | — |
| Debian 14 | icu | 67.1-7 | — |
| Debian 13 | chromium | 93.0.4577.82-1 | — |
| Debian 13 | icu | 67.1-7 | — |
| Debian 12 | chromium | 93.0.4577.82-1 | — |
| Debian 12 | icu | 67.1-7 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | icu | 66.1-2ubuntu2.1 | USN-5156-1 |
| Ubuntu 18.04 LTS | chromium-browser | 91.0.4472.77-0ubuntu0.18.04.1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP3 | chromium | 91.0.4472.77-bp153.2.3.1 | openSUSE-SU-2021:0840-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | chromium | 93.0.4577.82-1.1 | openSUSE-SU-2024:12948-1, openSUSE-SU-2024:10681-1 |
| openSUSE Leap 15.3 | chromium | 91.0.4472.77-bp153.2.3.1 | openSUSE-SU-2021:0840-1 |
| openSUSE Leap 15.2 | chromium | 91.0.4472.77-lp152.2.98.1 | openSUSE-SU-2021:0825-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | chromium | 91.0.4472.77-r0 | — |
| Alpine v3.23 | chromium | 91.0.4472.77-r0 | — |
| Alpine v3.23 | qt5-qtwebengine | 5.15.3_git20210510-r2 | — |
| Alpine v3.22 | chromium | 91.0.4472.77-r0 | — |
| Alpine v3.22 | qt5-qtwebengine | 5.15.3_git20210510-r2 | — |
| Alpine v3.21 | chromium | 91.0.4472.77-r0 | — |
| Alpine v3.21 | qt5-qtwebengine | 5.15.3_git20210510-r2 | — |
| Alpine v3.20 | chromium | 91.0.4472.77-r0 | — |
| Alpine v3.20 | qt5-qtwebengine | 5.15.3_git20210510-r2 | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | chromium | 91.0.4472.77-r0 | — |
| Alpine v3.19 | qt5-qtwebengine | 5.15.3_git20210510-r2 | — |
| Alpine v3.18 | chromium | 91.0.4472.77-r0 | — |
| Alpine v3.18 | qt5-qtwebengine | 5.15.3_git20210510-r2 | — |
| Alpine v3.17 | chromium | 91.0.4472.77-r0 | — |
| Alpine v3.17 | qt5-qtwebengine | 5.15.3_git20210510-r2 | — |
| Alpine v3.16 | chromium | 91.0.4472.77-r0 | — |
| Alpine v3.16 | qt5-qtwebengine | 5.15.3_git20210510-r2 | — |
| Alpine v3.15 | chromium | 91.0.4472.77-r0 | — |
| Alpine v3.15 | qt5-qtwebengine | 5.15.3_git20210510-r2 | — |
| Alpine v3.14 | chromium | 91.0.4472.77-r0 | — |
| Alpine v3.14 | qt5-qtwebengine | 5.15.3_git20211006-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
califio/icu4x-crubit-demo ★ 0 · Oct 8, 2026
C++ contact-list demo comparing vulnerable ICU4C 66.1 with ICU4X through Crubit (CVE-2021-30535).
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 5
- USN-5156-1 A security issue was fixed in ICU Ubuntu Security Notices (USN) · Apr 22, 2026
- openSUSE-SU-2024:10681-1 chromedriver-93.0.4577.82-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0840-1 Security update for chromium SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12948-1 ungoogled-chromium-113.0.5672.92-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0825-1 Security update for chromium SUSE / openSUSE Security Updates · May 7, 2025