| Name | CVE-2026-25210 |
| Description | In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation. |
| 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) |
| Debian Bugs | 1126697 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| expat (PTS) | bullseye | 2.2.10-2+deb11u5 | vulnerable |
| bullseye (security) | 2.2.10-2+deb11u7 | vulnerable |
| bookworm | 2.5.0-1+deb12u2 | vulnerable |
| bookworm (security) | 2.5.0-1+deb12u1 | vulnerable |
| trixie | 2.7.1-2 | vulnerable |
| forky, sid | 2.7.4-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| expat | source | (unstable) | 2.7.4-1 | | | 1126697 |
Notes
[trixie] - expat <no-dsa> (Minor issue)
[bookworm] - expat <no-dsa> (Minor issue)
[bullseye] - expat <postponed> (Minor issue)
Fixed by: https://github.com/libexpat/libexpat/commit/7ddea353ad3795f7222441274d4d9a155b523cba (R_2_7_4)
Fixed by: https://github.com/libexpat/libexpat/commit/8855346359a475c022ec8c28484a76c852f144d9 (R_2_7_4)
Fixed by: https://github.com/libexpat/libexpat/commit/9c2d990389e6abe2e44527eeaa8b39f16fe859c7 (R_2_7_4)