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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.

Official resources

Publicly disclosed as CVE-2021-37975 and added to CISA’s Known Exploited Vulnerabilities catalog on 2021-11-03. Use the CVE publication date and KEV dates for timing context; do not infer any later generation date as the issue date.