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PatchSiren cyber security CVE debrief

CVE-2021-4102 Google CVE debrief

CVE-2021-4102 is a Google Chromium V8 use-after-free vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2021-12-15. The available corpus indicates it should be remediated using vendor guidance, but it does not provide deeper technical detail or a CVSS score.

Vendor
Google
Product
Chromium V8
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-12-15
Original CVE updated
2021-12-15
Advisory published
2021-12-15
Advisory updated
2021-12-15

Who should care

Security teams and administrators responsible for Google Chromium / Chromium V8 patching should treat this as a priority item, especially where CISA KEV remediation deadlines are used for operational tracking.

Technical summary

The provided sources identify the issue as a use-after-free vulnerability in Chromium V8 and confirm its inclusion in CISA's Known Exploited Vulnerabilities catalog. Beyond that classification, the supplied corpus does not include root-cause analysis, affected versions, exploitation mechanics, or scoring details.

Defensive priority

High

Recommended defensive actions

  • Apply updates per vendor instructions as referenced by CISA KEV.
  • Validate that systems using Google Chromium or Chromium V8 are included in your patch inventory and remediation workflow.
  • Confirm remediation before or by the KEV due date of 2021-12-29 where applicable.
  • Re-scan or verify asset compliance after patching to ensure the vulnerable component has been updated.

Evidence notes

All factual claims in this debrief are drawn from the supplied CISA KEV source item and the official CVE/NVD resource links. The corpus identifies CVE-2021-4102 as a Google Chromium V8 use-after-free vulnerability, lists it as a KEV item, and provides dateAdded 2021-12-15 with dueDate 2021-12-29. No CVSS score or additional exploit detail was present in the supplied material.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-4102 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-4102

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2021-4102 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-4102

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.