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libexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in expat_realloc() function on 32-bit platforms when computing allocation sizes. Attackers supplying malicious XML to applications parsing with vulnerable libexpat can cause heap buffer overflow, memory corruption, or denial of service.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade expat-develUpgrade expat | Oct 25, 2026 | Oct 22, 2026 |
| Alpine Linux | — | Upgrade expat | Oct 20, 2026 | Sep 29, 2026 |
| Amazon Linux Ami 2 | — | Upgrade firefox | Oct 19, 2026 | Oct 19, 2026 |
| Amazon_linux_2023 | — | Upgrade firefoxUpgrade firefox-debugsourceUpgrade firefox-debuginfo | Oct 13, 2026 | Sep 29, 2026 |
| Debian | — | Upgrade expat | Oct 20, 2026 | Sep 29, 2026 |
| Ibm Aix | — | Apply the fix or workaround for python_advisory22 | Oct 21, 2026 | Oct 21, 2026 |
| Oracle_linux | — | Upgrade expatUpgrade expat-devel | Oct 28, 2026 | Sep 29, 2026 |
| Redhat_linux | — | Upgrade expat-debuginfoUpgrade expat-debugsourceUpgrade expat-develNo solution existsUpgrade expat | Oct 1, 2026 | Sep 29, 2026 |
| Rocky_linux | — | Upgrade expat-debugsourceUpgrade expat-debuginfoUpgrade expatUpgrade expat-devel | Oct 26, 2026 | Oct 23, 2026 |
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