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CVE-2021-30512: Use after free in Notifications in Google Chrome prior to 90.0.4430.212 allowed a remote attacker who had c...

Use after free in Notifications in Google Chrome prior to 90.0.4430.212 allowed a remote attacker who had compromised the renderer process to potentially exploit heap corruption via a crafted HTML page.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Chrome flaw is a memory safety issue in the Notifications component. A malicious page could potentially use it after already compromising Chrome's renderer process. The sources do not show active exploitation, but outdated browser fleets should still be treated as business risk because browser bugs are common entry points in attack chains.

Executive priority

Prioritize routine-to-urgent browser patching, especially for users exposed to untrusted web content. This is not evidenced as actively exploited in the bundle, but it affects a widely deployed browser and could support chained attacks.

Technical view

CVE-2021-30512 is a use-after-free in Google Chrome Notifications before 90.0.4430.212. The CVE description says a remote attacker with a compromised renderer process could potentially trigger heap corruption through crafted HTML. Public sources provide limited detail and no CVSS score.

Likely exposure

Primary exposure is endpoints running Google Chrome before 90.0.4430.212. Gentoo and Fedora advisories indicate Linux distribution packages also required updates. The bundle does not establish exposure for other Chromium-based browsers, so verify only against vendor-specific guidance.

Exploitation context

The source bundle does not cite active exploitation, and the CVE is not marked KEV. The described attack requires a compromised renderer process, suggesting this is more likely useful as part of a chained browser attack than as a standalone initial compromise.

Researcher notes

Public detail is sparse. The Chromium bug reference is included, but the bundle does not provide exploit mechanics, impact finality, CVSS, or confirmed exploitation. Treat the renderer-compromise prerequisite as important when scoring internal risk.

Mitigation direction

  • Update Google Chrome to 90.0.4430.212 or later.
  • Apply Gentoo or Fedora browser package updates where applicable.
  • Confirm endpoint management policies enforce supported Chrome versions.
  • Check vendor guidance for any platform-specific remediation details.

Validation and detection

  • Inventory Chrome versions across managed endpoints.
  • Flag any Chrome installation older than 90.0.4430.212.
  • Review Linux package status against Gentoo or Fedora advisories.
  • Confirm browser update telemetry shows successful rollout.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-30512 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
GoogleChromeunspecifiedListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.