RHSA-2026:3405
Vulnerability from csaf_redhat - Published: 2026-02-26 07:35 - Updated: 2026-02-26 20:02Summary
Red Hat Security Advisory: libpng security update
Notes
Topic
An update for libpng is now available for Red Hat Enterprise Linux 9.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The libpng packages contain a library of functions for creating and manipulating Portable Network Graphics (PNG) image format files.
Security Fix(es):
* libpng: libpng: Information disclosure and denial of service via integer truncation in simplified write API (CVE-2026-22801)
* libpng: libpng: Denial of service and information disclosure via heap buffer over-read in png_image_finish_read (CVE-2026-22695)
* libpng: LIBPNG has a heap buffer overflow in png_set_quantize (CVE-2026-25646)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"details": "Moderate"
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"title": "libpng: libpng: Denial of service and information disclosure via heap buffer over-read in png_image_finish_read"
},
{
"cve": "CVE-2026-22801",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2026-01-13T00:08:42.581146+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2428824"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in libpng, a reference library for PNG (Portable Network Graphics) raster image files. An integer truncation vulnerability exists in the png_write_image_16bit and png_write_image_8bit simplified write API functions. A local attacker could exploit this flaw by providing a negative row stride (for bottom-up image layouts) or a stride exceeding 65535 bytes, leading to a heap buffer over-read. This can result in information disclosure or a denial of service (DoS) to the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libpng: libpng: Information disclosure and denial of service via integer truncation in simplified write API",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated Moderate for Red Hat products. An integer truncation flaw in the libpng simplified write API functions (`png_write_image_16bit`, `png_write_image_8bit`) can lead to a heap buffer over-read. Exploitation requires an application to process specially crafted input that provides a negative row stride or a stride exceeding 65535 bytes, potentially resulting in denial of service or information disclosure.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-22801"
},
{
"category": "external",
"summary": "RHBZ#2428824",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2428824"
},
{
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"summary": "https://www.cve.org/CVERecord?id=CVE-2026-22801",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-22801"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-22801",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22801"
},
{
"category": "external",
"summary": "https://github.com/pnggroup/libpng/security/advisories/GHSA-vgjq-8cw5-ggw8",
"url": "https://github.com/pnggroup/libpng/security/advisories/GHSA-vgjq-8cw5-ggw8"
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"text": "LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.55, an out-of-bounds read vulnerability exists in the png_set_quantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user\u0027s display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer. The images that trigger this vulnerability are valid per the PNG specification. This vulnerability is fixed in 1.6.55.",
"title": "Vulnerability description"
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{
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"text": "libpng: LIBPNG has a heap buffer overflow in png_set_quantize",
"title": "Vulnerability summary"
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{
"category": "other",
"text": "For `java-17-openjdk-headless` and `java-21-openjdk-headless`, while the affected code is present in the bundled sources, it is not exercised by these headless packages.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25646"
},
{
"category": "external",
"summary": "http://www.openwall.com/lists/oss-security/2026/02/09/7",
"url": "http://www.openwall.com/lists/oss-security/2026/02/09/7"
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{
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"url": "https://github.com/pnggroup/libpng/security/advisories/GHSA-g8hp-mq4h-rqm3"
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{
"category": "vendor_fix",
"date": "2026-02-26T07:35:43+00:00",
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"integrityImpact": "LOW",
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "libpng: LIBPNG has a heap buffer overflow in png_set_quantize"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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