In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.
CVSS Details
- CVSS 3.1 Base Score: 6.9
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade expat | Jun 29, 2026 | Jun 19, 2026 |
| Amazon Linux Ami 2 | — | Upgrade firefoxUpgrade expat-develUpgrade thunderbirdUpgrade expat-staticUpgrade expatUpgrade expat-debuginfo | Jul 8, 2026 | Jul 8, 2026 |
| Amazon_linux_2023 | — | Upgrade expat-debugsourceUpgrade expat-develUpgrade firefox-debuginfoUpgrade expat-debuginfoUpgrade firefoxUpgrade firefox-debugsourceUpgrade expat-staticUpgrade expat | Jul 8, 2026 | Jun 19, 2026 |
| Debian | — | Upgrade expat | Aug 2, 2026 | Aug 2, 2026 |
| Freebsd | — | Upgrade linux-rl9-expatUpgrade linux-c7-expatUpgrade expat | Jun 30, 2026 | Jun 28, 2026 |
| Ibm Aix | — | Apply the fix or workaround for python_advisory20 | Jul 15, 2026 | Jul 14, 2026 |
| Redhat_linux | — | No solution existsUpgrade expat-develUpgrade expatUpgrade expat-debuginfoUpgrade expat-debugsource | Jul 17, 2026 | Jun 19, 2026 |
| Rocky_linux | — | Upgrade expatUpgrade expat-debugsourceUpgrade expat-develUpgrade expat-debuginfo | Sep 10, 2026 | Sep 9, 2026 |
| Ubuntu | — | Upgrade expatUpgrade expat (Ubuntu Pro) | Sep 24, 2026 | Jun 19, 2026 |
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