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help / color / mirror / Atom feedFrom: Noah Misch <noah@leadboat.com>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Fix overflows with ts_headline()
Date: Mon, 11 May 2026 12:19:37 +0000
Message-ID: <E1wMPbl-0002Tn-07@gemulon.postgresql.org> (raw)
Fix overflows with ts_headline()
The options "StartSel", "StopSel" and "FragmentDelimiter" given by a
caller of the SQL function ts_headline() have their lengths stored as
int16. When providing values larger than PG_INT16_MAX, it was possible
to overflow the length values stored, leading to incorrect behaviors in
generateHeadline(), in most cases translating to a crash.
Attempting to use values for these options larger than PG_INT16_MAX is
now blocked. Some test cases are added to cover our tracks.
Reported-by: Xint Code
Author: Michael Paquier <michael@paquier.xyz>
Backpatch-through: 14
Security: CVE-2026-6473
Branch
------
REL_18_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/62ad262661ed92b0fbd43e8b7bbd1e0e38cbb9c0
Author: Michael Paquier <michael@paquier.xyz>
Modified Files
--------------
src/backend/tsearch/wparser_def.c | 24 +++++++++++++++++++++---
src/test/regress/expected/tsearch.out | 10 ++++++++++
src/test/regress/sql/tsearch.sql | 8 ++++++++
3 files changed, 39 insertions(+), 3 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: noah@leadboat.com, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Fix overflows with ts_headline()
In-Reply-To: <E1wMPbl-0002Tn-07@gemulon.postgresql.org>
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