Security readout for executives and security teams
Plain-English summary
CVE-2021-30601 is a Google Chrome memory safety flaw in the Extensions API. A victim would need to install a malicious extension, after which crafted HTML could trigger heap corruption. The public bundle identifies Chrome before 92.0.4515.159 as affected, but does not provide CVSS, CWE, or evidence of active exploitation.
Executive priority
Treat as a browser hygiene issue requiring timely remediation, especially on unmanaged endpoints. Urgency rises if employees can install arbitrary extensions or if legacy Chrome versions remain in production.
Technical view
The issue is described as a use-after-free in Chrome's Extensions API before version 92.0.4515.159. The attack path requires a malicious extension and crafted HTML, creating potential heap corruption. Public details are sparse, and the Chromium bug reference does not add remediation detail in this bundle.
Likely exposure
Organizations are most exposed where Chrome or Chromium-derived packages remain older than 92.0.4515.159 and users can install unapproved extensions. Fedora Chromium package users should also review the listed Fedora advisories.
Exploitation context
The cited CVE text describes user-assisted exploitation through malicious extension installation and crafted HTML. The bundle marks CISA KEV as false and provides no cited evidence of in-the-wild exploitation.
Researcher notes
The public record lacks CVSS, CWE, and detailed root-cause notes. Avoid assuming exploitability beyond the stated heap-corruption potential and the malicious-extension precondition. No active exploitation is evidenced in the provided sources.
Mitigation direction
- Update Google Chrome to 92.0.4515.159 or later.
- Update Chromium packages using applicable Fedora or vendor advisories.
- Restrict user installation of unapproved browser extensions.
- Review vendor guidance for any additional hardening steps.
Validation and detection
- Inventory Chrome and Chromium versions across managed endpoints.
- Confirm no systems remain below Chrome 92.0.4515.159.
- Check extension allowlists and installation policy enforcement.
- Verify Fedora Chromium packages include the referenced security updates.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-30601 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://chromereleases.googleblog.com/2021/08/stable-channel-update-for-desktop.htmlCVE reference · x_refsource_MISC
- https://crbug.com/1234009CVE reference · x_refsource_MISC
- FEDORA-2021-78b9d84299CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-6225d60814CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-02b301441fCVE reference · vendor-advisory, x_refsource_FEDORA
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.