CLSA-2026-1791195137
See a problem?- Import Source
- https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791195137.json
- JSON Data
- https://api.osv.dev/v1/vulns/CLSA-2026-1791195137
- Upstream
- Published
- 2026-10-05T10:12:31Z
- Modified
- 2026-10-26T09:31:40Z
- Summary
- Fix CVE(s): CVE-2026-66046, CVE-2026-76641, CVE-2026-93990
- Details
-
- SECURITY UPDATE: denial of service through quadratic runtime in the
default-attribute lookup performed by storeAtts()
- debian/patches/CVE-2026-66046.patch: resolve whether an attribute is declared CDATA through the per-element defaultAttsNames hash table instead of a linear scan of defaultAtts in expat/lib/xmlparse.c
- CVE-2026-66046
- SECURITY UPDATE: out-of-bounds read of .attIndex in storeAtts() for
parsers created by XML_ExternalEntityParserCreate()
- debian/patches/CVE-2026-76641.patch: make dtdCopy() create the defaultAttsNames entries with the size of NAME_AND_DEFAULT_ATTRIBUTE and carry the attribute index over in expat/lib/xmlparse.c
- CVE-2026-76641
- SECURITY UPDATE: malformed UTF-16 accepted because a high surrogate was
not required to be followed by a low surrogate
- debian/patches/CVE-2026-93990.patch: reject a UTF-16 high surrogate whose second code unit is not a low surrogate in the little2_ and big2_ tokenizers in expat/lib/xmltok.c and expat/lib/xmltok_impl.c
- CVE-2026-93990
- SECURITY UPDATE: denial of service through quadratic runtime in the
default-attribute lookup performed by storeAtts()
- References
Affected packages
TuxCare:Ubuntu:20.04 / expat
Package
- Name
- expat
- Purl
- pkg:deb/tuxcare/expat?distro=ubuntu-20.04
TuxCare:Ubuntu:20.04 / libexpat1
Package
- Name
- libexpat1
- Purl
- pkg:deb/tuxcare/libexpat1?distro=ubuntu-20.04