CVE-2026-40468: fossies gawk Integer Overflow or Wraparound
CVSS: 9.1v3.1CriticalAnalyzed
AliasesSUSE-SU-2026:3211-1UBUNTU-CVE-2026-40468DEBIAN-CVE-2026-40468
Published 13-07-2026Last modified 13-07-2026
Vulnerability summary
CVE-2026-40468 is a critical (CVSS 9.1) Integer Overflow or Wraparound vulnerability in fossies gawk. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.3% of scored vulnerabilities.
CVSS score
9.1/10
010
Critical · v3.1 (NVD)EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 12 · Related 6Timeline
- 13-07-2026PublishedVulnerability first disclosed.
- 13-07-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
6 scores · 4 sources · 2 versionsLow 2.1Preferred score · CVE.org (CNA)
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:LSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated2.1LowCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:L
- NVDNIST2.1LowCVSS: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
Critical 9.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS trend
Probability
0.20%
Chance of exploitation in the next 30 days
Percentile
9%
Versus all other CVEs
30-day change
0.00 pp
From 0.20% on 20-09-2026
20-09-202620-10-2026
EPSS score0.20%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- gawkAll versions (No fix recorded)
Fossies1 product
- gawk≤ 5.4.0
Gnu1 product
- gawk≤ 5.4.0
Suse1 product
- gawk&distro=SUSE Linux Enterprise Server LTSS Extended Security 12 SP5< 4.1.0-5.6.1
Ubuntu1 product
- gawk< 1:4.0.1+dfsg-2.1ubuntu2+esm2 | < 1:4.1.3+dfsg-0.1ubuntu0.1~esm2 | < 1:4.1.4+dfsg-1ubuntu0.1~esm2 | < 1:5.0.1+dfsg-1ubuntu0.1+esm1 | < 1:5.1.0-1ubuntu0.2 | < 1:5.2.1-2ubuntu0.1 | < 1:5.3.2-1ubuntu1.1
5 vendors · 5 products
References
10 links- cert.pl/en/posts/2026/07/CVE-2026-40467Third Party Advisory
