CVE-2026-40467
published 2026-07-13CVE-2026-40467: Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine). This issue may lead to a crash. It affects gawk in…
PriorityP340high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.21%
11.1th percentile
Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine). This issue may lead to a crash. 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
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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_redhat7.5HIGH
vendor_ubuntu7.5HIGH
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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 Use After Free vulnerability in io.c
vendor_redhat·2026-07-13·CVSS 7.5
CVE-2026-40467 [HIGH] CWE-825 gawk: gawk: Denial of Service due to Use After Free vulnerability in io.c
gawk: gawk: Denial of Service due to Use After Free vulnerability in io.c
Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine). This issue may lead to a crash. It affects gawk in versions 5.4.0 and below.
A flaw was found in gawk. A Use After Free vulnerability exists in the do_getline_redir() routine within the io.c program file. This vulnerability can be triggered by an attacker, potentially leading to a system crash and causing a Denial of Service (DoS).
Statement: Moderate: A Use After Free vulnerability in gawk's `do_getline_redir()` routine can lead to a denial of service. This flaw, affecting gawk in Red Hat Hardened Images, requires a local attacker with low privileges to trick a user into interacting with specially crafted inpu
VulDB
GNU gawk up to 5.4.0 Input Redirection io.c do_getline_redir use after free (Nessus ID 326570 / WID-SEC-2026-3649)
vuldb·2026-10-03·CVSS 7.5
CVE-2026-40467 [HIGH] GNU gawk up to 5.4.0 Input Redirection io.c do_getline_redir use after free (Nessus ID 326570 / WID-SEC-2026-3649)
A vulnerability, which was classified as problematic, was found in GNU gawk up to 5.4.0. This affects the function do_getline_redir of the file io.c of the component Input Redirection. Executing a manipulation can lead to use after free.
This vulnerability is registered as CVE-2026-40467. The attack needs to be launched locally. No exploit is available.
GHSA
Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine).
ghsa_unreviewed·2026-07-13
CVE-2026-40467 [MEDIUM] CWE-416 Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine).
Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine). This issue may lead to a crash. It affects gawk in versions 5.4.0 and below.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-40467 gawk: gawk: Denial of Service due to Use After Free vulnerability in io.c [fedora-all]
bugzilla·2026-07-31·CVSS 7.5
CVE-2026-40467 [HIGH] CVE-2026-40467 gawk: gawk: Denial of Service due to Use After Free vulnerability in io.c [fedora-all]
CVE-2026-40467 gawk: gawk: Denial of Service due to Use After Free vulnerability in io.c [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.
Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine). This issue may lead to a crash. It affects gawk in versions 5.4.0 and below.
Bugzilla
CVE-2026-40467 gawk: gawk: Denial of Service due to Use After Free vulnerability in io.c
bugzilla·2026-07-13·CVSS 7.5
CVE-2026-40467 [HIGH] CVE-2026-40467 gawk: gawk: Denial of Service due to Use After Free vulnerability in io.c
CVE-2026-40467 gawk: gawk: Denial of Service due to Use After Free vulnerability in io.c
Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine). This issue may lead to a crash. It affects gawk in versions 5.4.0 and below.
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
2026-07-13
Published