OpenBSD 8.0 adds firewall hardening and vulnerability fixes
Errata also cover a remotely triggerable IPsec AES-GMAC kernel heap overflow on specific hardware; AES-GCM is unaffected.
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Vulnerability1 · 1 read
CVE-2026-76641
- CVSS 4.0
- 8.7 high
- EPSS
- <1%p29
- Published
- ·
- Modified
Description · NVD
Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.
- Weakness
- CWE-125
- Vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X