CVE-2026-40553
Published: July 16, 2026Last modified: July 21, 2026
Description
Buffer overflow vulnerability has been found in "extension/readdir.c" program file of gawk (ftype() routine). This issue could be used to crash the program and potentially to achieve code execution, although the latter has not been confirmed to be feasible. It affects gawk in versions 5.4.0 and below.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | gawk | Fixed (5.1.1-r2) |
| 25 LTS | gawk | Fixed (5.3.2-r3) | |
| Stream | gawk | Fixed (5.3.2-r3) | |
| Hardened Containers | 23 LTS | gawk | Fixed (5.1.1-r2) |
| 25 LTS | gawk | Fixed (5.3.2-r3) | |
| Stream | gawk | Fixed (5.3.2-r3) |