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CVE-2022-37454

XKCP: buffer overflow in the SHA-3 reference implementation

The Keccak XKCP SHA-3 reference implementation before fdc6fef has an integer overflow and resultant buffer overflow that allows attackers to execute arbitrary code or eliminate expected cryptographic properties. This occurs in the sponge function interface.

CVSS 3.1 · 9.8 Critical EPSS 7.4% KEV · Not listed
Vendors
Debian Extended Keccak Code Package Project Fedoraproject and 6 more
Products
Debian Linux Extended Keccak Code Package Fedora and 6 more
CVE-2026-76875

PyPy pyexpat ExternalEntityParserCreate Use-After-Free

PyPy before versions 3.11.16 and 3.12.14 contains a use-after-free vulnerability in the pyexpat module's ExternalEntityParserCreate function that allows attackers to corrupt memory by supplying a crafted XML document to applications that create external-entity sub-parsers without retaining a reference to the parent parser. The child parser retains a raw C back-pointer to the parent parser struct while PyPy's tracing garbage collector can free the parent's C struct, causing bundled libexpat to dereference the freed pointer on every parsed token, producing memory corruption.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
Pypy
Products
Pypy