CVE-2021-30632
Memory Safety in Fedoraproject Fedora 33 … 35
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2021-30632 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Fedoraproject Fedora. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Security Account Manager (T1003.002); ranked in the top 0.8% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2021-30632 is an out-of-bounds write vulnerability in the V8 JavaScript engine affecting Google Chrome versions prior to 93.0.4577.82. The flaw is classified under CWE-787 and carries a CVSS 3.1 score of 8.8, indicating high impact on confidentiality, integrity, and availability.
A remote attacker can exploit the issue by serving a crafted HTML page to a victim, triggering heap corruption in the browser's JavaScript execution environment without requiring authentication.
Chrome stable channel updates and corresponding Fedora package advisories recommend upgrading to version 93.0.4577.82 or later to address the vulnerability. Public references also include a Chromium bug tracker entry and a technical report describing a JIT compiler type confusion trigger.
The provided Packet Storm reference points to a proof-of-concept exploit targeting the same code path.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-17552
Vulnerability Data
Out of bounds write in V8 in Google Chrome prior to 93.0.4577.82 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
- CWE(s)
- KEV Date Added
- 03 November 2021
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Vulnerability scanning and recording can discover out-of-bounds write flaws so they can be remediated.
Patching or replacing vulnerable software directly eliminates known instances of this coding weakness.
Secure-development practices (static analysis, bounds checking, code review) are the primary means of preventing out-of-bounds writes.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.