CVE-2026-42169: redhat enterprise_linux Incorrect Calculation of Buffer Size
Vulnerability summary
CVE-2026-42169 is a high (CVSS 7.8) Incorrect Calculation of Buffer Size vulnerability in redhat enterprise_linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.5% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 3Timeline
- 04-08-2026PublishedVulnerability first disclosed.
- 12-10-2026Last modifiedVulnerability information updated.
Description
A heap-buffer-overflow vulnerability exists in the APNG (Animated PNG) file loader of GIMP. This flaw occurs when the `fcTL` width exceeds the `IHDR` width, leading to pixel data being written past the end of a heap allocation. Additionally, a heap-based buffer overflow exists in the DDS plug-in due to a BPP mismatch in the `load_layer()` function. Both vulnerabilities can be triggered by opening a specially crafted image file, potentially leading to code execution.
CVSS metrics
4 scores · 4 sources · 1 version- CVE.orgCNA7.3HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.13%
Chance of exploitation in the next 30 days
Percentile
3%
Versus all other CVEs
30-day change
0.00 pp
From 0.13% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat2 products
Debian1 product
- gimp< 3.2.4-1
Ubuntu1 product
- gimpAll versions (No fix recorded)
3 vendors · 4 products
