Security readout for executives and security teams
Plain-English summary
CVE-2021-30535 is a memory-safety flaw in Google Chrome before 91.0.4472.77. A malicious web page could potentially trigger heap corruption. For executives, this is a browser update priority because exposure can come from normal web browsing, but the provided sources do not show confirmed active exploitation.
Executive priority
Prioritize remediation as a normal high-priority browser patch. The issue is remotely reachable through web content, but current source evidence does not justify emergency language for active exploitation.
Technical view
The CVE describes a double free in ICU within Google Chrome before 91.0.4472.77, reachable through a crafted HTML page and potentially causing heap corruption. No CVSS, CWE, detailed root cause, or public exploit confirmation is provided in the source bundle.
Likely exposure
Organizations with Google Chrome installations older than 91.0.4472.77 are the clear exposure. The bundle does not define OS-specific scope, enterprise configuration dependencies, or downstream package names beyond cited Fedora advisories.
Exploitation context
The available description supports remote attack potential through a crafted HTML page. CISA KEV status is false, and the provided sources do not state active exploitation, exploit maturity, or in-the-wild targeting.
Researcher notes
Evidence is limited to a concise CVE description and vendor advisory references. Treat this as a memory-corruption browser vulnerability with incomplete public technical detail. Avoid assuming exploitability, affected downstream products, or mitigations beyond vendor updates.
Mitigation direction
- Update Google Chrome to 91.0.4472.77 or later.
- Apply relevant Fedora package updates where Fedora advisories apply.
- Use browser management tooling to enforce minimum approved versions.
- Reduce use of unpatched browsers until updates are confirmed.
Validation and detection
- Inventory Chrome versions across managed endpoints.
- Confirm no deployed Chrome instance is older than 91.0.4472.77.
- Check Fedora-managed systems against the cited Fedora advisories.
- Verify browser update policies are active and reporting compliance.
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-2021-30535 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/2021/05/stable-channel-update-for-desktop_25.htmlCVE reference · x_refsource_MISC
- https://crbug.com/1194899CVE reference · x_refsource_MISC
- FEDORA-2021-f94dadff78CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-ca58c57bdfCVE 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.