CVE-2026-120458

Description

Kvazaar through 2.3.2 contains an infinite loop vulnerability in read_header() in src/encmain.c that allows attackers to hang the command-line encoder by supplying a truncated Y4M header. Attackers can provide a crafted .y4m file lacking a terminating newline, causing unchecked EOF reads that hang the process indefinitely while consuming a full CPU core.

Overview

State: PUBLISHED
Assigner (CNA): VulnCheck
CVSS severity: MEDIUM
CVSS score: 6.8 / 10
CVSS 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
Effective score: 6.8 / 10 MEDIUM source: CNA overview
CWE(s): CWE-835
Reserved: 2026-11-02
Published: 2026-11-02 14:29 UTC
Last updated: 2026-11-02 14:29 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/120xxx/CVE-2026-120458.json

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-115218

EUVD enrichment is queued; refresh the page in a few seconds.

Affected products (1)

Vendor	Product	Versions	Platforms
Ultra Video Group	Kvazaar	`0` (affected)	—

Vendor references (6)

References embedded in the original CVE record by the assigning CNA.

https://github.com/ultravideo/kvazaar/issues/452 issue-tracking
https://github.com/ultravideo/kvazaar/commit/8a2f109be283e87008c679d635966cc034da39c6 patch
https://github.com/ultravideo/kvazaar/blob/v2.3.2/src/encmain.c#L339-L357 technical-description
Kvazaar v2.3.2 Release Notes release-notes
https://hackmd.io/@haindpwn/kvazaar-y4m-header-missing-newline-infinite-loop technical-description
VulnCheck Advisory: Kvazaar through 2.3.2 Infinite Loop DoS via Y4M Header Parser third-party-advisory

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

Remediations (10)

CVE Database Search & Remediation Guidance

web:cvedatabase.com

Search and analyze CVE vulnerabilities with instant access to CVSS scores, affected products, and remediation guidance.

2026-11-03 12:35 UTC
CVE Vulnerabilities 2026: Critical Flaws & Fixes Hub

web:cyberupdates365.com

Track critical CVE vulnerabilities 2026 with verified enterprise patch guides. Fix zero-days across VMware, WordPress, Windows, and cloud infrastructure.

2026-11-03 12:35 UTC
GitHub - bjbakker1984/Yellowkey-mitigation: A small script to apply ...

web:github.com

Yellowkey- mitigation .ps1 is a PowerShell script that automates the WinRE mitigation workflow described in CVE - 2026 -45585, adds verification after every step, and does not execute step 6 (reagentc /disable + reagentc /enable) if any earlier step fails. It also checks whether the required registry change was actually needed and applied. The script only commits the WinRE image if it actually ...

2026-11-03 12:35 UTC
YellowKey BitLocker Bypass: CVE-2026-45585 Mitigation & TPM+PIN

web:windowsforum.com

Microsoft acknowledged the publicly disclosed YellowKey BitLocker bypass on May 20, 2026 , assigning it CVE - 2026 -45585 and publishing mitigations for affected Windows 11 and Windows Server 2025 systems rather than a full security update.

2026-11-03 12:35 UTC
What Is CVE Remediation in 2026? - aikido.dev

web:www.aikido.dev

None of these is a clean fix , which is why the decision on how to remediate depends on knowing what package versions are running in production and why. This post will cover how AI has accelerated CVE detection and discovery, the upgrade trap, what CVE remediation actually involves in 2026 , and how to solve the CVE remediation problem.

2026-11-03 12:35 UTC
Microsoft is working on a patch for 'YellowKey ... - Computerworld

web:www.computerworld.com

Microsoft says it is considering a patch for a zero-day vulnerability, dubbed YellowKey, that allows attackers with access to a Windows device to bypass Bitlocker encryption protection and read ...

2026-11-03 12:35 UTC
CVE: Common Vulnerabilities and Exposures

web:www.cve.org

At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

2026-11-03 12:35 UTC
The 8 Best Automated Vulnerability Remediation Tools in 2026

web:www.openhands.dev

Compare 8 automated vulnerability remediation tools for 2026 on fixes, prioritization, integrations, and deployment control.

2026-11-03 12:35 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-11-03 12:35 UTC
Oracle Critical Security Patch Update Advisory - September 2026

web:www.oracle.com

Prior Critical Patch Update and Critical Security Patch Update advisories should be reviewed for information regarding earlier published security patches. Refer to Critical Patch Updates, Critical Security Patch Updates, Security Alerts and Bulletins for information about Oracle Security advisories.

2026-11-03 12:35 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-120458.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Kvazaar",
          "repo": "https://github.com/ultravideo/kvazaar",
          "vendor": "Ultra Video Group",
          "versions": [
            {
              "lessThanOrEqual": "2.3.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "HaiND from the Post and Telecommunication Institute of Technology"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Marko Viitanen (fador)"
        }
      ],
      "datePublic": "2026-08-25T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Kvazaar through 2.3.2 contains an infinite loop vulnerability in read_header() in src/encmain.c that allows attackers to hang the command-line encoder by supplying a truncated Y4M header. Attackers can provide a crafted .y4m file lacking a terminating newline, causing unchecked EOF reads that hang the process indefinitely while consuming a full CPU core."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-835",
              "description": "Loop with Unreachable Exit Condition ('Infinite Loop')",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-02T14:29:15.073Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/ultravideo/kvazaar/issues/452"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/ultravideo/kvazaar/commit/8a2f109be283e87008c679d635966cc034da39c6"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/ultravideo/kvazaar/blob/v2.3.2/src/encmain.c#L339-L357"
        },
        {
          "name": "Kvazaar v2.3.2 Release Notes",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/ultravideo/kvazaar/releases/tag/v2.3.2"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://hackmd.io/@haindpwn/kvazaar-y4m-header-missing-newline-infinite-loop"
        },
        {
          "name": "VulnCheck Advisory: Kvazaar through 2.3.2 Infinite Loop DoS via Y4M Header Parser",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/kvazaar-through-2.3.2-infinite-loop-dos-via-y4m-header-parser"
        }
      ],
      "title": "Kvazaar through 2.3.2 Infinite Loop DoS via Y4M Header Parser",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-120458",
    "datePublished": "2026-11-02T14:29:15.073Z",
    "dateReserved": "2026-11-02T12:42:23.013Z",
    "dateUpdated": "2026-11-02T14:29:15.073Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}