CVE-2021-21148
Google Chromium V8: Heap Buffer Overflow
As of , CVE-2021-21148 in Google Chromium V8 is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.
- Exploited
- Yes: CISA listed it on 3 November 2021
- US federal deadline
- 17 November 202114 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Not known to CISA
- EPSS score
- 0.20Higher than 97% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- Not availableCISA listed it before 4 February 2022, where the EPSS files we read begin.
- Public exploit
- None foundNeither Metasploit nor Exploit-DB lists one.
- Fix
- No vendor link in CISA's entry
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
Google Chromium V8 Engine contains a heap buffer overflow vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
CISA's description
Heap buffer overflow in V8 in Google Chrome prior to 88.0.4324.150 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
The CVE record's description, from Chrome
- CVE published
- 9 February 2021
- Assigned by
- Chrome
- CVSS
- 8.8 High (CVSS 3.1, from CISA-ADP)
- CWE-787
- Out-of-bounds Write
- CWE-122
- Heap-based Buffer Overflow
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- no
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
Chromium V8: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2018-17463Remote Code Execution | Google Chromium V8 | Patch this weekMetasploit module; EPSS 0.85; verified Exploit-DB entry | 0.85 | ||
| CVE-2019-5825Out-of-Bounds Write | Google Chromium V8 | Patch this weekMetasploit module; EPSS 0.56; verified Exploit-DB entry | 0.56 | ||
| CVE-2020-6418Type Confusion | Google Chromium V8 | Patch this weekMetasploit module; EPSS 0.79; verified Exploit-DB entry | 0.79 | ||
| CVE-2021-21220Improper Input Validation | Google Chromium V8 | Patch this weekMetasploit module; EPSS 0.70 | 0.70 | ||
| CVE-2018-6065Integer Overflow | Google Chromium V8 | Patch this weekEPSS 0.60; verified Exploit-DB entry | 0.60 | ||
| CVE-2021-21224Type Confusion | Google Chromium V8 | Patch this weekEPSS 0.84 | 0.84 | ||
| CVE-2021-30551Type Confusion | Google Chromium V8 | Patch this weekEPSS 0.65 | 0.65 | ||
| CVE-2021-30632Out-of-Bounds Write | Google Chromium V8 | Patch this weekEPSS 0.63 | 0.63 | ||
| CVE-2026-85046Type Confusion | Google Chromium V8 | Patch soon | 0.49 | ||
| CVE-2023-4762Type Confusion | Google Chromium V8 | Patch soon | 0.41 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org