Security readout for executives and security teams
Plain-English summary
This Chrome flaw is a memory-safety bug in DevTools. The cited CVE says exploitation required convincing a user to install a malicious extension and then interact with a crafted HTML page. Google fixed it in Chrome 92.0.4515.107. No supplied source says it is actively exploited.
Executive priority
Treat as a normal browser security update priority, not an emergency based on supplied evidence. Prioritize managed fleets with outdated Chrome and weak extension controls.
Technical view
CVE-2021-30576 is a use-after-free vulnerability in Google Chrome DevTools before 92.0.4515.107. The reported impact is potential heap corruption through crafted HTML, with a malicious extension as a prerequisite. The bundle provides no CVSS score or CWE mapping.
Likely exposure
Exposure is mainly desktop Chrome installations older than 92.0.4515.107, including downstream Chromium packages referenced by Fedora advisories. Risk is higher where users can freely install browser extensions and browse untrusted pages.
Exploitation context
The source bundle does not show KEV listing or active exploitation. The described attack path depends on social engineering a user into installing a malicious extension, then using crafted HTML to trigger heap corruption.
Researcher notes
The public record is sparse: no CVSS, CWE, or detailed bug content is included. Avoid assuming code execution or sandbox escape unless separate vendor evidence supports it. The attack precondition is important for risk scoring.
Mitigation direction
- Update Google Chrome to 92.0.4515.107 or later.
- Update Fedora Chromium packages using the referenced Fedora advisories.
- Restrict unauthorized browser extension installation through enterprise policy.
- Review vendor guidance for any additional platform-specific fixes.
Validation and detection
- Inventory Chrome and Chromium versions across managed endpoints.
- Confirm installed versions are not older than 92.0.4515.107.
- Check extension policy enforcement for user-installable extensions.
- Review endpoint telemetry for suspicious or newly installed extensions.
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-2021-30576 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/2021/07/stable-channel-update-for-desktop_20.htmlCVE reference · x_refsource_MISC
- https://crbug.com/1194896CVE 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.