CVE-2026-40468
published 2026-07-13CVE-2026-40468: 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…
PriorityP350critical9.1CVSS 3.1
AVNACLPRNUINSUCNIHAH
EPSS
0.20%
9.5th percentile
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.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| fossies | gawk | <= 5.4.0 | — |
| gnu | gawk | <= 5.4.0 | — |
| gnu | gawk | — | — |
| ubuntu | gawk | — | — |
CVSS provenance
nvdv3.19.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
nvdv4.02.1LOWCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat9.1CRITICAL
vendor_ubuntu7.5HIGH
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VulDB
GNU gawk up to 5.4.0 builtin.c integer overflow (Nessus ID 326566)
vuldb·2026-07-14·CVSS 9.1
CVE-2026-40468 [CRITICAL] GNU gawk up to 5.4.0 builtin.c integer overflow (Nessus ID 326566)
A vulnerability classified as problematic has been found in GNU gawk up to 5.4.0. Impacted is an unknown function of the file builtin.c. This manipulation causes integer overflow.
This vulnerability is tracked as CVE-2026-40468. The attack is restricted to local execution. No exploit exists.
GHSA
Integer overflow vulnerability has been found in "builtin.c" program file of gawk.
ghsa_unreviewed·2026-07-13
CVE-2026-40468 [LOW] CWE-190 Integer overflow vulnerability has been found in "builtin.c" program file of gawk.
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.
Ubuntu
Gawk vulnerabilities
vendor_ubuntu·2026-07-22·CVSS 7.5
CVE-2026-40468 [HIGH] Gawk vulnerabilities
Title: Gawk vulnerabilities
Summary: Several security issues were fixed in Gawk.
It was discovered that Gawk incorrectly handled memory when processing
input using the getline redirection. An attacker could possibly use
this issue to cause a denial of service. (CVE-2026-40467)
It was discovered that Gawk incorrectly handled certain integer
calculations when allocating memory. An attacker could possibly use
this issue to cause a denial of service or overwrite heap memory with
attacker-controlled data. (CVE-2026-40468)
It was discovered that Gawk incorrectly handled certain integer
calculations when performing substitutions. An attacker could possibly
use this issue to cause a denial of service. (CVE-2026-40469)
It was discovered that Gawk incorrectly handled memory when reading
directo
Red Hat
gawk: gawk: Memory corruption via integer overflow
vendor_redhat·2026-07-13·CVSS 9.1
CVE-2026-40468 [CRITICAL] CWE-190 gawk: gawk: Memory corruption via integer overflow
gawk: gawk: Memory corruption via integer overflow
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.
A flaw was found in gawk. An integer overflow vulnerability could allow a local attacker to cause memory exhaustion, leading to a denial of service. This flaw may also enable an attacker to corrupt gawk's internal memory, potentially leading to system instability.
Statement: Moderate: An integer overflow vulnerability in gawk's builtin.c could allow a local attacker to cause memory exhaustion and overwrite heap metadata. This could lead to system
No detection rules found.
No public exploits indexed.
Rapid7
Patch Tuesday - July 2026
blogs_rapid7·2026-07-14·CVSS 9.6
CVE-2026-58617 [CRITICAL] Patch Tuesday - July 2026
Microsoft is publishing 622 vulnerabilities on July 2026 Patch Tuesday , including a record-breaking 416 Windows vulnerabilities. Microsoft is aware of exploitation in the wild for two of the vulnerabilities published today, both of which are listed on CISA KEV, as well as public disclosure for one other. As usual, browser vulns are not included in the Patch Tuesday count above. Rapid7 noted last month that Microsoft no longer enumerates Chromium CVEs in the Security Update Guide. However, Microsoft has now taken the pursuit of minimalism much further, since today’s Security Update Guide no longer lists out even Microsoft vulnerabilities! Instead, we now receive a summary table of vulnerability counts by product family, as well as a new slimline “Notable CVEs” section. All of this only ser
Bugzilla
CVE-2026-40468 gawk: gawk: Memory corruption via integer overflow [fedora-all]
bugzilla·2026-08-03·CVSS 9.1
CVE-2026-40468 [CRITICAL] CVE-2026-40468 gawk: gawk: Memory corruption via integer overflow [fedora-all]
CVE-2026-40468 gawk: gawk: Memory corruption via integer overflow [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Bugzilla
CVE-2026-40468 gawk: gawk: Memory corruption via integer overflow
bugzilla·2026-07-13·CVSS 9.1
CVE-2026-40468 [CRITICAL] CVE-2026-40468 gawk: gawk: Memory corruption via integer overflow
CVE-2026-40468 gawk: gawk: Memory corruption via integer overflow
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.
2026-07-13
Published