CVE-2026-40469
published 2026-07-13CVE-2026-40469: Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine). This issue could be used to overwrite gawk heap metadata…
PriorityP349critical9.1CVSS 3.1
AVNACLPRNUINSUCNIHAH
EPSS
0.21%
11.1th percentile
Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine). This issue could be used to overwrite gawk heap metadata and objects causing the program to crash. It affects 32-bit builds of 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
nvdv4.05.1MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/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 do_sub integer overflow (Nessus ID 326562)
vuldb·2026-07-14·CVSS 9.1
CVE-2026-40469 [CRITICAL] GNU gawk up to 5.4.0 builtin.c do_sub integer overflow (Nessus ID 326562)
A vulnerability, which was classified as problematic, has been found in GNU gawk up to 5.4.0. The impacted element is the function do_sub of the file builtin.c. Performing a manipulation results in integer overflow.
This vulnerability is cataloged as CVE-2026-40469. The attack must be initiated from a local position. There is no exploit available.
GHSA
Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine).
ghsa_unreviewed·2026-07-13
CVE-2026-40469 [MEDIUM] CWE-190 Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine).
Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine). This issue could be used to overwrite gawk heap metadata and objects causing the program to crash. It affects 32-bit builds of 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: Denial of Service due to integer overflow
vendor_redhat·2026-07-13·CVSS 9.1
CVE-2026-40469 [CRITICAL] CWE-190 gawk: gawk: Denial of Service due to integer overflow
gawk: gawk: Denial of Service due to integer overflow
Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine). This issue could be used to overwrite gawk heap metadata and objects causing the program to crash. It affects 32-bit builds of gawk in versions 5.4.0 and below.
A flaw was found in gawk. An integer overflow vulnerability exists in the `do_sub()` routine, which could allow an attacker to overwrite internal program data. This can lead to a denial of service (DoS) by causing the gawk program to crash. This issue affects 32-bit builds of gawk.
Statement: This vulnerability is only present in 32-bit builds of gawk, which are not provided for Red Hat Enterprise Linux versions 7 and later.
Package: gawk (Red Hat Enterprise Linux 10) - Not
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-2026-40469 gawk: gawk: Denial of Service due to integer overflow [fedora-all]
bugzilla·2026-09-01·CVSS 9.1
CVE-2026-40469 [CRITICAL] CVE-2026-40469 gawk: gawk: Denial of Service due to integer overflow [fedora-all]
CVE-2026-40469 gawk: gawk: Denial of Service due to 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 (do_sub() routine). This issue could be used to overwrite gawk heap metadata and objects causing the program to crash. It affects 32-bit builds of gawk in versions 5.4.0 and below.
Bugzilla
CVE-2026-40469 gawk: gawk: Denial of Service due to integer overflow
bugzilla·2026-07-13·CVSS 9.1
CVE-2026-40469 [CRITICAL] CVE-2026-40469 gawk: gawk: Denial of Service due to integer overflow
CVE-2026-40469 gawk: gawk: Denial of Service due to integer overflow
Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine). This issue could be used to overwrite gawk heap metadata and objects causing the program to crash. It affects 32-bit builds of gawk in versions 5.4.0 and below.
2026-07-13
Published