| Name | CVE-2026-50219 |
| Description | libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur, |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4765-1, DSA-6404-1 |
| Debian Bugs | 1138862 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| expat (PTS) | bookworm | 2.5.0-1+deb12u2 | vulnerable |
| bookworm (security) | 2.5.0-1+deb12u3 | fixed | |
| trixie (security), trixie | 2.8.3-1~deb13u1 | fixed | |
| forky, sid | 2.8.4-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| expat | source | bookworm | 2.5.0-1+deb12u3 | DLA-4765-1 | ||
| expat | source | trixie | 2.8.2-1~deb13u1 | DSA-6404-1 | ||
| expat | source | (unstable) | 2.8.2-1 | 1138862 |
https://github.com/libexpat/libexpat/pull/1246