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An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document xmlDictComputeFastKey in dict.c can produce non-deterministic values leading to various logic and memory errors such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string and any value is possible (not solely the '\0' value).

🗓️ 25 Apr 2023 07:00:00Reported by MicrosoftType 
mscve
 mscve🔗 msrc.microsoft.com👁 1 Views

Libxml2 before 2.10.4 hashes empty dictionary strings non-deterministically in crafted document, causing memory errors.

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microsoftcbl2_libxml2_2.10.4-1Range<2.10.4-1

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03 Aug 2023 07:00Current
7.6High risk
Vulners AI Score7.6
CVSS 3.16.5
EPSS0.0022
SSVC
non deterministic hashingempty dictionary stringscrafted documentmemory errorsdouble free
1