Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
A moderate security flaw (CVE-2026-40930) was found in libpng, a library used for processing PNG image files, including Animated PNGs (APNG). The vulnerability allows a remote attacker to craft a malicious APNG file that causes the application to misinterpret attacker-controlled data as a new chunk header. This can lead to denial of service or unexpected application behavior affecting data integrity and availability. Red Hat has issued an update for Red Hat Hardened Images RPMs including libpng version 1.6.58-1.hum1 to address this issue. No direct patch link is provided, but the advisory references updated RPMs. Mitigations are currently not available or do not meet Red Hat's criteria for deployment. The vulnerability has not been observed exploited in the wild.
AI Analysis
Technical Summary
CVE-2026-40930 is a vulnerability in libpng (version 1.8.0 referenced in the description) where specially crafted Animated Portable Network Graphics (APNG) files contain attacker-controlled data within an ignored chunk. This data can be misinterpreted as a new chunk header, leading to improper validation of input consistency (CWE-1288). The impact includes low severity effects on data integrity and availability, such as denial of service or unexpected application behavior. Red Hat released an update for libpng RPMs (version 1.6.58-1.hum1) in Red Hat Hardened Images to fix this issue. The advisory notes no mitigations currently meet Red Hat's criteria, and no known exploits exist in the wild. The CVSS base score assigned by Red Hat is 5.4 (medium severity).
Potential Impact
The vulnerability allows remote attackers to cause denial of service or unexpected application behavior by processing malicious APNG files. The impact is limited to low integrity and availability effects, with no confidentiality impact. There are no known exploits in the wild. The flaw could lead to resource exhaustion or application crashes.
Mitigation Recommendations
Red Hat has released updated libpng RPM packages (version 1.6.58-1.hum1) for Red Hat Hardened Images to address this vulnerability. Users should apply these updates as per Red Hat's guidance. Currently, no alternative mitigations are available or meet Red Hat's criteria for ease of use and applicability. Users are advised to upgrade to the fixed versions when possible.
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Description
A moderate security flaw (CVE-2026-40930) was found in libpng, a library used for processing PNG image files, including Animated PNGs (APNG). The vulnerability allows a remote attacker to craft a malicious APNG file that causes the application to misinterpret attacker-controlled data as a new chunk header. This can lead to denial of service or unexpected application behavior affecting data integrity and availability. Red Hat has issued an update for Red Hat Hardened Images RPMs including libpng version 1.6.58-1.hum1 to address this issue. No direct patch link is provided, but the advisory references updated RPMs. Mitigations are currently not available or do not meet Red Hat's criteria for deployment. The vulnerability has not been observed exploited in the wild.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-40930 is a vulnerability in libpng (version 1.8.0 referenced in the description) where specially crafted Animated Portable Network Graphics (APNG) files contain attacker-controlled data within an ignored chunk. This data can be misinterpreted as a new chunk header, leading to improper validation of input consistency (CWE-1288). The impact includes low severity effects on data integrity and availability, such as denial of service or unexpected application behavior. Red Hat released an update for libpng RPMs (version 1.6.58-1.hum1) in Red Hat Hardened Images to fix this issue. The advisory notes no mitigations currently meet Red Hat's criteria, and no known exploits exist in the wild. The CVSS base score assigned by Red Hat is 5.4 (medium severity).
Potential Impact
The vulnerability allows remote attackers to cause denial of service or unexpected application behavior by processing malicious APNG files. The impact is limited to low integrity and availability effects, with no confidentiality impact. There are no known exploits in the wild. The flaw could lead to resource exhaustion or application crashes.
Mitigation Recommendations
Red Hat has released updated libpng RPM packages (version 1.6.58-1.hum1) for Red Hat Hardened Images to address this vulnerability. Users should apply these updates as per Red Hat's guidance. Currently, no alternative mitigations are available or meet Red Hat's criteria for ease of use and applicability. Users are advised to upgrade to the fixed versions when possible.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:20356
- Cve Count
- 1
Threat ID: 6a9c264dacd9273b49fca03b
Added to database: 09/05/2026, 14:25:17 UTC
Last enriched: 09/07/2026, 14:08:35 UTC
Last updated: 09/10/2026, 19:36:53 UTC
Views: 8
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