Fix CVE-2026-11824: buffer overwrite in fts5 corrupt records
Backport upstream fix (commit 79db323ce14) for
CVE-2026-11824 to sqlite 3.34.1. The patch fixes a potential
buffer overwrite in fts5 when processing corrupt records by
changing the check in fts5LeafRead() from pRet->nn<4 to
pRet->szLeaf<4. The test file fts5corruptA.test is included
to verify the fix.
CVE: CVE-2026-11824
Upstream patches:
- 79db323ce1.patch
Resolves: RHEL-218281
This commit was backported by Ymir, a Red Hat Enterprise Linux software maintenance AI agent.
Assisted-by: Ymir
This commit is contained in:
RHEL Packaging Agent
Petr Khartskhaev
parent
077eeaa410
commit
043aac02a8
104
sqlite-3.34.1-CVE-2026-11824.patch
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104
sqlite-3.34.1-CVE-2026-11824.patch
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@ -0,0 +1,104 @@
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From c8264f2dfd167d20caa746daf98ec99151cf16b0 Mon Sep 17 00:00:00 2001
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From: dan <Dan Kennedy>
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Date: Mon, 11 May 2026 11:12:06 +0000
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Subject: [PATCH] Fix potential buffer overwrite that could occur in fts5 when
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processing corrupt records.
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FossilOrigin-Name: 4a5ad516ea93926c0d5206b4d72c3675905d2bf666b27a649256b93eb95c671b
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---
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ext/fts5/fts5_index.c | 2 +-
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ext/fts5/test/fts5corruptA.test | 72 +++++++++++++++++++++++++++++++++
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2 files changed, 73 insertions(+), 1 deletion(-)
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create mode 100644 ext/fts5/test/fts5corruptA.test
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diff --git a/ext/fts5/fts5_index.c b/ext/fts5/fts5_index.c
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index f83488e2f..f31c2250b 100644
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--- a/ext/fts5/fts5_index.c
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+++ b/ext/fts5/fts5_index.c
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@@ -708,7 +708,7 @@ static void fts5DataRelease(Fts5Data *pData){
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static Fts5Data *fts5LeafRead(Fts5Index *p, i64 iRowid){
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Fts5Data *pRet = fts5DataRead(p, iRowid);
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if( pRet ){
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- if( pRet->nn<4 || pRet->szLeaf>pRet->nn ){
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+ if( pRet->szLeaf<4 || pRet->szLeaf>pRet->nn ){
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p->rc = FTS5_CORRUPT;
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fts5DataRelease(pRet);
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pRet = 0;
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diff --git a/ext/fts5/test/fts5corruptA.test b/ext/fts5/test/fts5corruptA.test
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new file mode 100644
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index 000000000..838cded57
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--- /dev/null
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+++ b/ext/fts5/test/fts5corruptA.test
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@@ -0,0 +1,72 @@
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+# 2026 May 11
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+#
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+# The author disclaims copyright to this source code. In place of
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+# a legal notice, here is a blessing:
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+#
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+# May you do good and not evil.
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+# May you find forgiveness for yourself and forgive others.
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+# May you share freely, never taking more than you give.
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+#
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+#***********************************************************************
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+#
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+
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+source [file join [file dirname [info script]] fts5_common.tcl]
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+set testprefix fts5corruptA
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+
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+# If SQLITE_ENABLE_FTS5 is not defined, omit this file.
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+ifcapable !fts5 {
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+ finish_test
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+ return
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+}
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+sqlite3_fts5_may_be_corrupt 1
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+
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+do_execsql_test 1.0 {
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+ CREATE VIRTUAL TABLE t USING fts5(x, detail='full');
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+ INSERT INTO t(t, rank) VALUES('pgsz', 32);
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+}
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+
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+set big [string repeat "a " 200]
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+do_execsql_test 1.1 {
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+ INSERT INTO t(rowid, x) VALUES(1, $big)
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+}
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+
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+do_test 1.2 {
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+ db eval {
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+ SELECT min(rowid) AS base_rowid, count(*) AS page_count FROM t_data
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+ WHERE rowid>1000
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+ } {}
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+} {}
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+
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+do_test 1.3 {
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+ for {set ii 0} {$ii < 5} {incr ii} {
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+ db eval {
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+ INSERT INTO t_data(rowid, block)
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+ VALUES( $base_rowid + $page_count + $ii, zeroblob(4) );
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+ }
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+ }
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+ db eval {
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+ INSERT INTO t_data(rowid, block)
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+ VALUES( $base_rowid + $page_count + 5,
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+ unhex('00000080' || 'CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC') );
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+ }
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+ set {} {}
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+} {}
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+
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+db close
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+
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+do_test 1.4 {
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+ set hex [hexio_read test.db 0 [file size test.db]]
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+
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+ set off [string first "023061018310" $hex]
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+ set hex [string replace $hex $off [expr $off+11] 023061018370]
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+ hexio_write test.db 0 $hex
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+} {6144}
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+
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+sqlite3 db test.db
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+
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+do_catchsql_test 1.5 {
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+ SELECT rowid FROM t WHERE t MATCH 'a'
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+} {1 {fts5: corruption found reading blob 137438953481 from table "t"}}
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+
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+sqlite3_fts5_may_be_corrupt 0
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+finish_test
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@ -12,7 +12,7 @@
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Summary: Library that implements an embeddable SQL database engine
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Name: sqlite
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Version: %{rpmver}
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Release: 10%{?dist}
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Release: 10%{?dist}.1
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License: Public Domain
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URL: http://www.sqlite.org/
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@ -37,6 +37,7 @@ Patch6: sqlite-3.34.1-covscan-rhel-9.patch
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Patch7: sqlite-3.26.0-CVE-2022-35737.patch
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Patch8: sqlite-3.34.1-CVE-2023-7104.patch
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Patch9: sqlite-3.34.1-CVE-2025-6965.patch
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Patch10: sqlite-3.34.1-CVE-2026-11824.patch
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BuildRequires: make
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BuildRequires: gcc
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@ -149,6 +150,7 @@ This package contains the analysis program for %{name}.
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%patch -P 7 -p1
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%patch -P 8 -p1
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%patch -P 9 -p1
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%patch -P 10 -p1
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# Remove backup-file
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rm -f %{name}-doc-%{docver}/sqlite.css~ || :
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@ -268,6 +270,10 @@ make test
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%endif
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%changelog
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* Wed Jul 29 2026 RHEL Packaging Agent <redhat-ymir-agent@redhat.com> - 3.34.1-10.1
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- Fixes CVE-2026-11824
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- Resolves: RHEL-218281
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* Tue Mar 17 2026 Petr Khartskhaev <pkhartsk@redhat.com> - 3.34.1-10
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- Enable sqlite3_deserialize and sqlite3_serialize interfaces
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- Resolves: RHEL-155950
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