Security readout for executives and security teams
Plain-English summary
CVE-2022-4921 is a Chrome memory-safety flaw in Accessibility. A malicious web page could gain arbitrary read/write capability if the attacker convinced a user to perform specific UI gestures. It requires user interaction, but the CVSS score is high because successful exploitation could affect confidentiality, integrity, and availability.
Executive priority
Treat this as a high-priority endpoint patching issue, not an emergency server incident. The risk depends on outdated browsers and user interaction, but successful exploitation could have serious impact on a workstation.
Technical view
The issue is a use-after-free weakness, CWE-416, in Chrome Accessibility before version 99.0.4844.51. The CVE describes network attackability through crafted HTML with required user interaction and no privileges. CVSS 3.1 is 8.8, while Chromium listed security severity as Low, likely reflecting exploit preconditions.
Likely exposure
Exposure is mainly endpoints running Google Chrome versions earlier than 99.0.4844.51, and Linux distributions shipping vulnerable Chromium packages. Public-facing servers are not the primary exposure; employee browsers and managed workstation fleets are.
Exploitation context
The source bundle does not identify active exploitation, and the CVE is not marked KEV. The described scenario requires a crafted HTML page and specific user UI gestures, so phishing, malicious links, or compromised sites are the relevant delivery context.
Researcher notes
The public CVE text gives the affected component, weakness class, attack preconditions, and fixed Chrome version. The bundle does not provide detailed root cause analysis, exploit evidence, or standalone mitigations beyond updating and following vendor guidance.
Mitigation direction
- Update Google Chrome to 99.0.4844.51 or later.
- Update Chromium packages from Linux distribution repositories, including Fedora where applicable.
- Prioritize managed browser auto-update compliance across employee endpoints.
- Check vendor and distribution advisories for any environment-specific guidance.
Validation and detection
- Inventory Chrome and Chromium versions across managed endpoints.
- Flag any Chrome installation earlier than 99.0.4844.51.
- Review patch telemetry for failed or delayed browser updates.
- Confirm Linux package versions against distribution security advisories.
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.
CWE-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-4921 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
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://chromereleases.googleblog.com/2022/03/stable-channel-update-for-desktop.htmlCVE reference
- https://crbug.com/1262902CVE reference
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PQKT7EGDD2P3L7S3NXEDDRCPK4NNZNWJ/CVE reference
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.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.