AI description
CVE-2025-64506 is a heap buffer over-read vulnerability found in libpng's `png_write_image_8bit` function. This occurs when processing 8-bit PNG images using the simplified write API with the `convert_to_8bit` option enabled. The vulnerability can be triggered by a specially-formatted 8-bit PNG image. The vulnerability stems from a conditional guard that incorrectly permits 8-bit input to be processed as 16-bit input, leading to reads beyond the allocated buffer. This affects 8-bit grayscale+alpha, RGB/RGBA images, and images with incomplete row data. Exploitation could lead to information disclosure through heap memory leakage or a denial of service due to application crashes.
- Description
- LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit input to enter code expecting 16-bit input, causing reads up to 2 bytes beyond allocated buffer boundaries. This issue has been patched in version 1.6.51.
- Source
- security-advisories@github.com
- NVD status
- Analyzed
- Products
- libpng
CVSS 3.1
- Type
- Secondary
- Base score
- 6.1
- Impact score
- 4.2
- Exploitability score
- 1.8
- Vector string
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
- Severity
- MEDIUM
- security-advisories@github.com
- CWE-125
- Hype score
- Not currently trending
CVE-2025-64506 LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to befo… https://t.co/enfEKfXjy2
@CVEnew
24 Nov 2025
231 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
CVE-2025-64506 libpng 1.6.51 https://t.co/LLE3DpmZaZ
@VulmonFeeds
22 Nov 2025
39 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
libpng 1.6.51: Four buffer overflow vulnerabilities fixed https://t.co/qBuxMJIllC CVE-2025-64505, CVE-2025-64506, CVE-2025-64720: Out-of-bounds reads, can result in information disclosure, denial of service CVE-2025-65018: Heap buffer overflow, may enable arbitrary code execution
@oss_security
22 Nov 2025
7010 Impressions
8 Retweets
53 Likes
21 Bookmarks
1 Reply
0 Quotes
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:libpng:libpng:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3545FEA5-4FFA-4955-BFDA-CC3602C9A894",
"versionEndExcluding": "1.6.51",
"versionStartIncluding": "1.6.0"
}
],
"operator": "OR"
}
]
}
]