This bug was fixed in the package libxml2 - 2.9.10+dfsg-5ubuntu0.20.04.5
---------------
libxml2 (2.9.10+dfsg-5ubuntu0.20.04.5) focal-security; urgency=medium
* SECURITY UPDATE: NULL pointer dereference
- debian/patches/CVE-2022-2309.patch: reset nsNr in
xmlCtxReset in parser.c (LP: #1996494).
- CVE-2022-2309
* SECURITY UPDATE: Integer overflow
- debian/patches/CVE-2022-40303.patch: fix integer overflows
with XML_PARSE_HUGE in parser.c.
- CVE-2022-40303
* SECURITY UPDATE: Double-free
- debian/patches/CVE-2022-40304.patch: fix dict
corruption caused by entity ref cycles in
entities.c.
- CVE-2022-40304
-- Leonidas Da Silva Barbosa <leo.barb...@canonical.com> Wed, 30 Nov
2022 09:53:52 -0300
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https://bugs.launchpad.net/bugs/1996494
Title:
CVE-2022-2309: NULL Pointer Dereference allows attackers to cause a
denial of service (or application crash)
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