CVE-2025-11679

  • Published: 2025-10-20T14:15:40.353
  • Last modified: 1761075085

Summary

🛡️ Vulnerability overview CVE-2025-11679 Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension. 📊 Technical details Severity: CVSS: Vendor: 🧩 Affected products Not specified. 🚨 Recommended mitigations Update to the latest available version Monitor logs and…

Technical details

    Severity & risk metrics

    Affected products & vendors

    Vendors not specified.

    Exploit & mitigation

    No vendor patch links provided.

    References & resources

    No references.


    🛡️ Vulnerability overview CVE-2025-11679

    Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension.

    📊 Technical details

    • Severity:
    • CVSS:
    • Vendor:

    🧩 Affected products

    • Not specified.
    • Update to the latest available version
    • Monitor logs and network traffic
    • Apply least-privilege and segment the network

    🔗 References

    • No related CVEs.

    Subscribe for CVE alerts

    Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension.

    Related CVE by CWE

    No related CWE found.

    Top CVE for Vendor

    No vendor taxonomy on this entry.

    Recently Exploited Similar Vulnerabilities

    No recent KEV-listed items for this vendor/product.

    How to fix CVE-2025-11679

    CVE-2025-11679 is a unknown severity vulnerability affecting the affected product.

    Description: Summary 🛡️ Vulnerability overview CVE-2025-11679 Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a […]

    Exploit Difficulty: HARD
    ⏱️ Time to exploit: > 4 hours
    🛠️ Required skills: Advanced security expertise
    💰 Public exploits: Rare or not public

    How to Fix:

    1 Identify affected systems

    - Check if you're running the affected product

    2 Immediate actions

    - Update to the latest patched version
    - If patching is not immediately possible: restrict network exposure, apply least-privilege access

    3 Verification

    - Test the fix in a staging environment first
    - Review logs for signs of exploitation
    - Monitor for IOCs (Indicators of Compromise)

    4 Long-term prevention

    - Enable automatic security updates
    - Set up vulnerability monitoring
    - Review and harden security configurations

    Vendor Advisory: https://libwebsockets.org/git/libwebsockets/commit?id=7df24cca7144d7bc9233b6b0a71108bd154ce101https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11679

    Exploit Difficulty Assessment

    HARD
    ⏱️ Time to Exploit: > 4 hours
    🛠️ Skills Required: Advanced security expertise
    💰 Public Exploits: Rare or not public

    Vulnerability Timeline

    Oct 20, 2025
    Vulnerability Published

    CVE details first published to NVD database

    Jan 01, 1970
    Last Modified

    CVE details were updated

    Oct 28, 2025
    Imported to Database

    Added to this CVE tracking system

    Detection Rules & IOCs

    No specific detection rules generated for this vulnerability type.

    No vendor/product data available.