Description
libicu in International Components for Unicode (ICU) 3.8.1 and earlier attempts to process backreferences to the nonexistent capture group zero (aka \0), which might allow context-dependent attackers to read from, or write to, out-of-bounds memory locations, related to corruption of REStackFrames.
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 | icu | 3.8-6 | — |
| Debian 13 | icu | 3.8-6 | — |
| Debian 12 | icu | 3.8-6 | — |
| Debian 4.0 | icu | 3.6-2etch1 | DSA-1511-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | icu +3 | 3.6-5.11.1 | RHSA-2008:0090 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | icu | 69.1-2.3 | openSUSE-SU-2024:10859-1 |
Advisories 3
- RHSA-2008:0090 Red Hat Security Advisory: icu security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1511-1 icu - multiple problems Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10859-1 icu-69.1-2.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- oval:org.mitre.oval:def:11172 vdb-entry signature
- 233922 vendor-advisory
- 28615 third-party-advisory
- oval:org.mitre.oval:def:5507 vdb-entry signature
- 29852 third-party-advisory
- 28783 third-party-advisory
- 29291 third-party-advisory
- SUSE-SA:2008:023 vendor-advisory
- 29242 third-party-advisory
- 1019269 vdb-entry
- GLSA-200805-16 vendor-advisory
- 29987 third-party-advisory
- SUSE-SR:2008:005 vendor-advisory
- 27455 vdb-entry
- 29294 third-party-advisory
- http://www.openoffice.org/security/cves/CVE-2007-4770.html
- GLSA-200803-20 vendor-advisory
- DSA-1511 vendor-advisory
- libicu-restackframes-dos(39938) vdb-entry
- http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0043
- RHSA-2008:0090 vendor-advisory
- 29333 third-party-advisory
- https://issues.rpath.com/browse/RPL-2199
- USN-591-1 vendor-advisory
- MDVSA-2008:026 vendor-advisory
- 231641 vendor-advisory
- ADV-2008-1375 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=429023
- 29194 third-party-advisory
- 30179 third-party-advisory
- FEDORA-2008-1076 vendor-advisory
- http://www.openoffice.org/security/cves/CVE-2007-5745.html
- 28575 third-party-advisory
- 20080206 rPSA-2008-0043-1 icu mailing-list
- [icu-support] 20080122 ICU Patch for bugs in Regular Expressions mailing-list
- 28669 third-party-advisory
- ADV-2008-0807 vdb-entry
- 29910 third-party-advisory
- FEDORA-2008-1036 vendor-advisory
- ADV-2008-0282 vdb-entry