Vulnerability · Published Sep 15, 2025 · Assigned by mitre
CVE-2025-59375
High 7.5
In plain English
A high-severity resource allocation without limits in libexpat from libexpat project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.4%top 27.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | expat | 2.7.1-1.el10_0.3 | ALSA-2025:19403 |
| AlmaLinux:10 | expat | 2.7.1-1.el10_1.3 | ALSA-2025:21030 |
| AlmaLinux:8 | expat | 2.5.0-1.el8_10 | ALSA-2025:21776 |
| AlmaLinux:9 | expat | 2.5.0-5.el9_7.1 | ALSA-2025:22175 |
| AlmaLinux:10 | expat-devel | 2.7.1-1.el10_1.3 | ALSA-2025:21030 |
| AlmaLinux:10 | expat-devel | 2.7.1-1.el10_0.3 | ALSA-2025:19403 |
| AlmaLinux:8 | expat-devel | 2.5.0-1.el8_10 | ALSA-2025:21776 |
| AlmaLinux:9 | expat-devel | 2.5.0-5.el9_7.1 | ALSA-2025:22175 |
| AlmaLinux:8 | mingw32-expat | 2.5.0-1.el8_10 | ALSA-2025:21974 |
| AlmaLinux:8 | mingw32-fontconfig | 2.12.6-4.el8_10 | ALSA-2026:3407 |
| AlmaLinux:8 | mingw64-expat | 2.5.0-1.el8_10 | ALSA-2025:21974 |
| AlmaLinux:8 | mingw64-fontconfig | 2.12.6-4.el8_10 | ALSA-2026:3407 |
| AlmaLinux:10 | python-unversioned-command | 3.12.13-2.el10_2 | ALSA-2026:19064 |
| AlmaLinux:10 | python3 | 3.12.13-2.el10_2 | ALSA-2026:19064 |
| AlmaLinux:10 | python3-debug | 3.12.13-2.el10_2 | ALSA-2026:19064 |
| AlmaLinux:10 | python3-devel | 3.12.13-2.el10_2 | ALSA-2026:19064 |
| AlmaLinux:10 | python3-idle | 3.12.13-2.el10_2 | ALSA-2026:19064 |
| AlmaLinux:10 | python3-libs | 3.12.13-2.el10_2 | ALSA-2026:19064 |
| AlmaLinux:10 | python3-test | 3.12.13-2.el10_2 | ALSA-2026:19064 |
| AlmaLinux:10 | python3-tkinter | 3.12.13-2.el10_2 | ALSA-2026:19064 |
| AlmaLinux:8 | python3.12 | 3.12.13-2.el8_10 | ALSA-2026:10950 |
| AlmaLinux:9 | python3.12 | 3.12.13-2.el9_8 | ALSA-2026:19177 |
| AlmaLinux:8 | python3.12-debug | 3.12.13-2.el8_10 | ALSA-2026:10950 |
| AlmaLinux:9 | python3.12-debug | 3.12.13-2.el9_8 | ALSA-2026:19177 |
| AlmaLinux:8 | python3.12-devel | 3.12.13-2.el8_10 | ALSA-2026:10950 |
| AlmaLinux:9 | python3.12-devel | 3.12.13-2.el9_8 | ALSA-2026:19177 |
| AlmaLinux:8 | python3.12-idle | 3.12.13-2.el8_10 | ALSA-2026:10950 |
| AlmaLinux:9 | python3.12-idle | 3.12.13-2.el9_8 | ALSA-2026:19177 |
| AlmaLinux:8 | python3.12-libs | 3.12.13-2.el8_10 | ALSA-2026:10950 |
| AlmaLinux:9 | python3.12-libs | 3.12.13-2.el9_8 | ALSA-2026:19177 |
| AlmaLinux:8 | python3.12-rpm-macros | 3.12.13-2.el8_10 | ALSA-2026:10950 |
| AlmaLinux:8 | python3.12-test | 3.12.13-2.el8_10 | ALSA-2026:10950 |
| AlmaLinux:9 | python3.12-test | 3.12.13-2.el9_8 | ALSA-2026:19177 |
| AlmaLinux:8 | python3.12-tkinter | 3.12.13-2.el8_10 | ALSA-2026:10950 |
| AlmaLinux:9 | python3.12-tkinter | 3.12.13-2.el9_8 | ALSA-2026:19177 |
| Alpine:v3.20 | expat | 2.7.2-r0 | ALPINE-CVE-2025-59375 |
| Alpine:v3.21 | expat | 2.7.2-r0 | ALPINE-CVE-2025-59375 |
| Alpine:v3.22 | expat | 2.7.2-r0 | ALPINE-CVE-2025-59375 |
| Alpine:v3.23 | expat | 2.7.2-r0 | ALPINE-CVE-2025-59375 |
| Alpine:v3.24 | expat | 2.7.2-r0 | ALPINE-CVE-2025-59375 |
| Debian:12 | expat | 2.5.0-1+deb12u5 | DEBIAN-CVE-2025-59375 |
| Debian:13 | expat | 2.8.2-1~deb13u1 | DEBIAN-CVE-2025-59375 |
| Debian:14 | expat | 2.7.2-1 | DEBIAN-CVE-2025-59375 |
| Debian:12 | firefox-esr | 140.9.0esr-1~deb12u1 | DEBIAN-CVE-2025-59375 |
| Debian:12 | firefox-esr | 140.9.0esr-1~deb12u1 | DSA-6178-1 |
| Debian:13 | firefox-esr | 140.9.0esr-1~deb13u1 | DEBIAN-CVE-2025-59375 |
| Debian:13 | firefox-esr | 140.9.0esr-1~deb13u1 | DSA-6178-1 |
| Debian:14 | firefox-esr | 140.9.0esr-1 | DEBIAN-CVE-2025-59375 |
| Debian:12 | thunderbird | 1:140.9.0esr-1~deb12u1 | DEBIAN-CVE-2025-59375 |
| Debian:12 | thunderbird | 1:140.9.0esr-1~deb12u1 | DSA-6179-1 |
| Debian:13 | thunderbird | 1:140.9.0esr-1~deb13u1 | DEBIAN-CVE-2025-59375 |
| Debian:13 | thunderbird | 1:140.9.0esr-1~deb13u1 | DSA-6179-1 |
| Debian:14 | thunderbird | 1:140.9.0esr-1 | DEBIAN-CVE-2025-59375 |
| Rocky Linux:10 | expat | 0:2.7.1-1.el10_0.3 | RLSA-2025:19403 |
| Rocky Linux:8 | expat | 0:2.5.0-1.el8_10 | RLSA-2025:21776 |
| Rocky Linux:9 | expat | 0:2.5.0-5.el9_7.1 | RLSA-2025:22175 |
| Rocky Linux:8 | mingw-expat | 0:2.5.0-1.el8_10 | RLSA-2025:21974 |
| Rocky Linux:8 | mingw-fontconfig | 0:2.12.6-4.el8_10 | RLSA-2026:3407 |
| Rocky Linux:10 | python3.12 | 0:3.12.13-2.el10_2 | RLSA-2026:19064 |
| Rocky Linux:8 | python3.12 | 0:3.12.13-2.el8_10 | RLSA-2026:10950 |
| Rocky Linux:9 | python3.12 | 0:3.12.13-2.el9_8 | RLSA-2026:19177 |
| Ubuntu:22.04:LTS | cadaver | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:24.04:LTS | cadaver | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:25.10 | cadaver | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:26.04:LTS | cadaver | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:26.10 | cadaver | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:22.04:LTS | expat | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:22.04:LTS | expat | 2.4.7-1ubuntu0.8 | USN-8790-1 |
| Ubuntu:24.04:LTS | expat | 2.6.1-2ubuntu0.5 | USN-8790-1 |
| Ubuntu:24.04:LTS | expat | 2.6.1-2ubuntu0.5 | UBUNTU-CVE-2025-59375 |
| Ubuntu:25.10 | expat | 2.7.1-2ubuntu0.2 | UBUNTU-CVE-2025-59375 |
| Ubuntu:26.04:LTS | expat | 2.7.4-1ubuntu0.1 | USN-8790-1 |
| Ubuntu:22.04:LTS | insighttoolkit4 | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:22.04:LTS | matanza | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:24.04:LTS | matanza | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:25.10 | matanza | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:26.04:LTS | matanza | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:26.10 | matanza | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:25.10 | swish-e | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:26.10 | swish-e | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:22.04:LTS | tdom | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:24.04:LTS | tdom | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:25.10 | tdom | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:26.04:LTS | tdom | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:26.10 | tdom | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:22.04:LTS | wbxml2 | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:24.04:LTS | wbxml2 | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:25.10 | wbxml2 | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:26.04:LTS | wbxml2 | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:26.10 | wbxml2 | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:25.10 | xmlrpc-c | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:26.04:LTS | xmlrpc-c | no fix listed | UBUNTU-CVE-2025-59375 |
| Ubuntu:26.10 | xmlrpc-c | no fix listed | UBUNTU-CVE-2025-59375 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| libexpat project | libexpat | 0 – before 2.7.2 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:H/RL:T/RC:C
References
- https://github.com/libexpat/libexpat/issues/1018
- https://github.com/libexpat/libexpat/pull/1034
- https://github.com/libexpat/libexpat/blob/676a4c531ec768732fac215da9730b5f50fbd2bf/expat/Changes#L45-L74
- https://issues.oss-fuzz.com/issues/439133977
- https://github.com/libexpat/libexpat/blob/R_2_7_2/expat/Changes
- http://www.openwall.com/lists/oss-security/2025/09/16/2
- http://www.openwall.com/lists/oss-security/2026/05/01/5
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-089022.html