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Debian 11: libfastjson Important Out-Of-Bounds Issue DLA-4258-1

debian lts
Calendar Grey July 28, 2025
Dist Debian Esm H88
Important patch for libfastjson addresses a memory corruption vulnerability that impacts JSON decoding on Debian LTS platforms.
An issue has been found in libfastjson, a fast json library for C
Topics%20covered

Topics Covered

security advisory debian important data integrity out-of-bounds libfastjson

Summary

An issue has been found in libfastjson, a fast json library for C.
Due to missing checks, out-of-bounds write might happen when parsing large
JSON files.


For Debian 11 bullseye, this problem has been fixed in version
0.99.9-1+deb11u1.

We recommend that you upgrade your libfastjson packages.

For the detailed security status of libfastjson please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/libfastjson

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS



Severity
important
Lowest
Low
Medium
High
Critical

Package: libfastjson
Version: 0.99.9-1+deb11u1
CVE ID: CVE-2020-12762

Topics%20covered

Topics Covered

security advisory debian important data integrity out-of-bounds libfastjson

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