---
id: CVE-2019-9937
title: >-
  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
summary: >-
  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.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
vendor: sqlite
product: sqlite
affected:
  - sqlite = 3.27.2
published: '2019-03-22'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T07:16:59.130'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2019-9937'
references:
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00026.html'
    label: cve@mitre.org
  - url: 'http://www.securityfocus.com/bid/107562'
    label: cve@mitre.org
  - url: 'https://lists.debian.org/debian-lts-announce/2020/08/msg00037.html'
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXD2GYJVTDGEQPUNMMMC5TB7MQXOBBMO/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N66U5PY5UJU4XBFZJH7QNKIDNAVIB4OP/
    label: cve@mitre.org
  - url: 'https://security.gentoo.org/glsa/201908-09'
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20190416-0005/'
    label: cve@mitre.org
  - url: 'https://sqlite.org/src/info/45c73deb440496e8'
    label: cve@mitre.org
  - url: 'https://usn.ubuntu.com/4019-1/'
    label: cve@mitre.org
  - url: >-
      https://www.mail-archive.com/sqlite-users%40mailinglists.sqlite.org/msg114383.html
    label: cve@mitre.org
  - url: >-
      https://www.mail-archive.com/sqlite-users%40mailinglists.sqlite.org/msg114393.html
    label: cve@mitre.org
  - url: 'https://www.oracle.com/security-alerts/cpujan2020.html'
    label: cve@mitre.org
  - url: >-
      https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
    label: cve@mitre.org
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00026.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.securityfocus.com/bid/107562'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2020/08/msg00037.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXD2GYJVTDGEQPUNMMMC5TB7MQXOBBMO/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N66U5PY5UJU4XBFZJH7QNKIDNAVIB4OP/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/201908-09'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20190416-0005/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://sqlite.org/src/info/45c73deb440496e8'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/4019-1/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://www.mail-archive.com/sqlite-users%40mailinglists.sqlite.org/msg114383.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://www.mail-archive.com/sqlite-users%40mailinglists.sqlite.org/msg114393.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.oracle.com/security-alerts/cpujan2020.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.06086
epssPercentile: 0.93266
ingestedAt: '2026-10-14T07:21:04.809Z'
---

## Overview

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.

## Affected

- `sqlite = 3.27.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.