In SQLite 3.27.2, interleaving reads and writes in a single transaction with an fts5 virtual table will lead to a NULL Pointer Dereference in fts5ChunkIterate in sqlite3.c. This is related to ext/fts5/fts5_hash.c and ext/fts5/fts5_index.c.
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00026.html
http://www.securityfocus.com/bid/107562
https://lists.debian.org/debian-lts-announce/2020/08/msg00037.html
https://security.gentoo.org/glsa/201908-09
https://security.netapp.com/advisory/ntap-20190416-0005/
https://sqlite.org/src/info/45c73deb440496e8
https://usn.ubuntu.com/4019-1/
https://www.mail-archive.com/[email protected]/msg114383.html
https://www.mail-archive.com/[email protected]/msg114393.html
https://www.oracle.com/security-alerts/cpujan2020.html
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
Source: MITRE
Published: 2019-03-22
Updated: 2020-08-23
Type: CWE-476
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 3.9
Severity: HIGH