Description
In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| xmlsoft | libxml2 | < 2.15.4 | 2.15.4 |
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 | libxml2 | 2.15.4+dfsg-1 | — |
| Debian 13 | libxml2 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | libxml2 +4 | 2.15.4-0.1.hum1 | RHSA-2026:64463 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | libxml2 +3 | 2.10.4-1.amzn2023.0.21 | ALAS2023-2026-3122 |
| Amazon Linux 2 | libxml2 +3 | 2.9.1-6.amzn2.5.27 | ALAS2-2026-3940 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libxml2 | 2.11.5-11 | — |
Advisories 6
- WID-SEC-2026-3195 libxml2: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- RHSA-2026:64463 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- WID-SEC-2026-3642 Meinberg LANTIME: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 14, 2026
- NCSC-2026-0404 Kwetsbaarheden verholpen in WatchGuard Fireware OS NCSC-NL (Netherlands) · Oct 7, 2026
- ALAS2023-2026-3122 Moderate: libxml2 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Sep 28, 2026
- ALAS2-2026-3940 Moderate: libxml2 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Sep 28, 2026