GNU gawk up to 5.4.0 builtin.c integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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3.9$0-$5k2.15

Summaryinfo

A vulnerability classified as problematic was found in GNU gawk up to 5.4.0. The affected element is an unknown function of the file builtin.c. Such manipulation leads to integer overflow. This vulnerability is listed as CVE-2026-40468. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability was found in GNU gawk up to 5.4.0. It has been rated as problematic. Affected by this issue is an unknown function of the file builtin.c. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is integrity, and availability. CVE summarizes:

Integer overflow vulnerability has been found in "builtin.c" program file of gawk. This issue may lead to memory exhaustion on the hosting operating system and could be used to overwrite gawk heap metadata and objects with attacker-controlled bytes. It affects gawk in versions 5.4.0 and below.

The advisory is available at cgit.git.savannah.gnu.org. This vulnerability is handled as CVE-2026-40468 since 04/13/2026. The exploitation is known to be easy. Local access is required to approach this attack. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.9
VulDB Meta Temp Score: 3.9

VulDB Base Score: 3.9
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/13/2026 CVE reserved
07/13/2026 +91 days Advisory disclosed
07/13/2026 +0 days VulDB entry created
07/13/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: gnu.org

Advisory: cgit.git.savannah.gnu.org
Status: Not defined

CVE: CVE-2026-40468 (🔒)
GCVE (CVE): GCVE-0-2026-40468
GCVE (VulDB): GCVE-100-378098

Entryinfo

Created: 07/13/2026 15:19
Changes: 07/13/2026 15:19 (52)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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