PatchSiren

PatchSiren cyber security CVE debrief

CVE-2021-37975 Google CVE debrief

CVE-2021-37975 is a Google Chromium V8 use-after-free vulnerability that CISA included in the Known Exploited Vulnerabilities catalog on 2021-11-03. Because it is listed as known exploited, defenders should treat patching and update deployment as urgent and follow vendor instructions.

Vendor
Google
Product
Chromium V8
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Security and IT teams responsible for Google Chromium V8 or Chromium-based software, especially environments that centrally manage browser or runtime updates.

Technical summary

The published description identifies the issue as a use-after-free in Google Chromium V8. The CISA KEV entry marks it as known exploited and directs organizations to apply updates per vendor instructions. No additional technical detail is provided in the supplied source corpus.

Defensive priority

High — known exploited; prioritize prompt vendor updates and fleet-wide remediation.

Recommended defensive actions

  • Apply updates per vendor instructions as soon as possible.
  • Confirm affected Chromium/V8 deployments are identified in your asset inventory.
  • Prioritize remediation for internet-facing, high-value, and broadly deployed endpoints.
  • Track completion against the CISA KEV due date of 2021-11-17 for this entry.
  • Validate that patch management processes cover Chromium-based software and V8-dependent components.

Evidence notes

The supplied corpus identifies CVE-2021-37975 as a Google Chromium V8 use-after-free vulnerability. The CISA KEV source marks it as a known exploited vulnerability, with dateAdded 2021-11-03 and dueDate 2021-11-17. No CVSS score was provided in the source corpus, so this debrief avoids assigning one.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-37975 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-37975

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

  • CVE-2021-37975 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-37975

    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.