SQLite up to 3.41 src/expr.c sqlite3ExprDelete use after free

Summaryinfo

A vulnerability was found in SQLite up to 3.41. It has been classified as critical. This affects the function sqlite3ExprDelete of the file src/expr.c. This manipulation causes use after free. The identification of this vulnerability is CVE-2026-51300. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in SQLite up to 3.41. It has been declared as critical. Affected by this vulnerability is the function sqlite3ExprDelete of the file src/expr.c. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A use-after-free vulnerability exists in the expression parsing and memory management logic of SQLite 3.41. After invoking sqlite3ExprDelete to release an expression object, the program still retains the dangling pointer and subsequently accesses member fields of the already freed memory. By constructing malicious SQL queries, a remote attacker can trigger invalid memory access, leading to application crash and sensitive memory information leakage.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-51300 since 06/07/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/27/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• SQLite

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.28
• 3.29
• 3.30
• 3.31
• 3.32
• 3.33
• 3.34
• 3.35
• 3.36
• 3.37
• 3.38
• 3.39
• 3.40
• 3.41

License

• free

Website

• Product: https://github.com/sqlite/sqlite/

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