LiveActive security incident?Get immediate response
CVE Record

CVE-2021-30565: Out of bounds write in Tab Groups in Google Chrome on Linux and ChromeOS prior to 92.0.4515.107 allowed an...

Out of bounds write in Tab Groups in Google Chrome on Linux and ChromeOS prior to 92.0.4515.107 allowed an attacker who convinced a user to install a malicious extension to perform an out of bounds memory write via a crafted HTML page.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Chrome issue could let a malicious extension trigger memory corruption through a crafted web page. The cited affected scope is Chrome on Linux and ChromeOS before 92.0.4515.107. The sources do not provide CVSS scoring or evidence of active exploitation.

Executive priority

Treat as a patch-compliance issue for browser fleets, not an emergency based on the provided evidence. Prioritize legacy Linux and ChromeOS endpoints and environments that permit unmanaged extension installation.

Technical view

CVE-2021-30565 is an out-of-bounds write in Chrome Tab Groups. Exploitation described by the CVE requires convincing a user to install a malicious extension, then interacting with crafted HTML. Google addressed it in Chrome 92.0.4515.107; Fedora advisories indicate downstream updates.

Likely exposure

Highest concern is unmanaged or slow-patched Linux and ChromeOS endpoints running Chrome before 92.0.4515.107, especially where users can install browser extensions. Exposure is lower where browsers auto-update and extension installation is centrally controlled.

Exploitation context

The public bundle does not show CISA KEV listing or active exploitation. The documented attack path requires user installation of a malicious extension plus crafted HTML, which raises the bar compared with drive-by browsing alone.

Researcher notes

The bundle lacks CVSS, CWE, exploit maturity, and detailed bug tracker content. Analysis should stay bounded to the published out-of-bounds write, Tab Groups component, Linux/ChromeOS scope, pre-92.0.4515.107 version threshold, and malicious-extension prerequisite.

Mitigation direction

  • Update Chrome on Linux and ChromeOS to 92.0.4515.107 or later.
  • Apply applicable Fedora package updates from the cited Fedora advisories.
  • Restrict untrusted Chrome extension installation until affected systems are updated.
  • Check Google and distribution guidance for any environment-specific remediation notes.

Validation and detection

  • Inventory Linux and ChromeOS endpoints for Chrome versions below 92.0.4515.107.
  • Review browser management policy for extension allowlists or unrestricted user installs.
  • Confirm Fedora systems have received the relevant advisory package updates.
  • Check vulnerability scanners for CVE-2021-30565 detections after patching.
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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2021-30565 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
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.