Description
NetSurf libnsbmp through 0.1.7 contains an out-of-bounds read vulnerability in bmp_decode_mask() that allows attackers to read one byte past the image buffer by supplying crafted ICO files. Attackers can provide an ICO whose inner bitmap width is not a multiple of 8, causing a heap over-read that can crash applications calling bmp_decode().
Published: 2026-10-15
Score: 6.8 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Thu, 15 Oct 2026 19:00:00 +0000

Type Values Removed Values Added
Description NetSurf libnsbmp through 0.1.7 contains an out-of-bounds read vulnerability in bmp_decode_mask() that allows attackers to read one byte past the image buffer by supplying crafted ICO files. Attackers can provide an ICO whose inner bitmap width is not a multiple of 8, causing a heap over-read that can crash applications calling bmp_decode().
Title NetSurf libnsbmp through 0.1.7 Out-of-Bounds Read via bmp_decode_mask
First Time appeared Netsurf-browser
Netsurf-browser libnsbmp
Weaknesses CWE-125
CPEs cpe:2.3:a:netsurf-browser:libnsbmp:*:*:*:*:*:*:*:*
Vendors & Products Netsurf-browser
Netsurf-browser libnsbmp
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Netsurf-browser Libnsbmp
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-15T18:57:31.959Z

Reserved: 2026-10-15T17:03:56.133Z

Link: CVE-2026-111139

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-15T19:17:27.983

Modified: 2026-10-15T19:17:27.983

Link: CVE-2026-111139

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses