Security readout for executives and security teams
Plain-English summary
This Chrome flaw is a memory corruption issue in Tab Groups. A successful attack required persuading a user to install a malicious extension, then using crafted HTML to trigger an out-of-bounds write. Google fixed it in Chrome 92.0.4515.131. The source bundle does not provide CVSS scoring or evidence of active exploitation.
Executive priority
Prioritize normal browser patching with elevated attention for fleets allowing user-installed extensions. This is not KEV-listed in the provided data, but browser memory corruption can carry meaningful endpoint risk when patching lags.
Technical view
CVE-2021-30592 is an out-of-bounds write in Google Chrome Tab Groups before 92.0.4515.131. The reported attack path combines a malicious extension prerequisite with crafted HTML. Public details are limited; the bundle provides no CWE, CVSS vector, exploit details, or confirmed exploitation.
Likely exposure
Exposure is most likely on endpoints running Google Chrome or downstream Chromium packages older than 92.0.4515.131, especially where users can install untrusted extensions. Fedora advisories indicate related package updates were issued for Fedora users.
Exploitation context
CISA KEV is false, and the provided sources do not state active exploitation. The described scenario requires user persuasion to install a malicious extension, then interaction with crafted HTML. Treat exploitation status as unconfirmed from these sources.
Researcher notes
Public evidence is sparse. The Chrome release note and CVE description establish the component, version boundary, and attack preconditions. The Chromium bug reference is listed, but the supplied bundle does not include technical root cause, crash details, exploitability assessment, or patch diff.
Mitigation direction
- Update Chrome to 92.0.4515.131 or later.
- Apply relevant Fedora Chromium package updates where applicable.
- Restrict extension installation to approved sources or managed allowlists.
- Remove untrusted or unnecessary browser extensions from managed endpoints.
- Check current Google and distribution guidance for any additional remediation.
Validation and detection
- Inventory Chrome and Chromium versions across endpoints.
- Confirm installed versions are 92.0.4515.131 or later.
- Review browser extension inventories for unapproved extensions.
- Verify enterprise extension policies block untrusted installation paths.
- Confirm Fedora systems received the referenced Chromium 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-2021-30592 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/the-stable-channel-has-been-updated-to.htmlCVE reference · x_refsource_MISC
- https://crbug.com/1209469CVE 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.