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Exploited vulnerability · CISA KEV

Is CVE-2021-39793 exploited? Yes: in CISA KEV since 11 Apr 2022

Gociux · Google Pixel · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2021-39793, Google Pixel Out-of-Bounds Write Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 11 Apr 2022, 26 days after it was published. It affects Google Pixel. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 11 Apr 2022
ransomwareNot knownno confirmed use
EPSSbelow top 10%lower predicted activity right now (it is still confirmed exploited)
severity7.8CVSS 3.1 · high
US federal due2 May 2022BOD 22-01 deadline

What it is

Google Pixel contains a possible out-of-bounds write due to a logic error in the code that could lead to local escalation of privilege.

VendorGoogle (77 exploited CVEs in KEV)
ProductPixel
VulnerabilityGoogle Pixel Out-of-Bounds Write Vulnerability
WeaknessCWE-787
Published16 Mar 2022
Added to KEV11 Apr 2022
Reported by (CNA)google_android

What to do

  1. Check whether you run it. Look for Pixel in your asset inventory, including appliances and cloud images. Stack check lists every exploited Google CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 16 Mar 2022.
  4. Get told next time. Email alerts when CISA adds a CVE for Google.

Other exploited CVEs in Pixel

References

Questions

Is CVE-2021-39793 being exploited?

Yes. CISA added CVE-2021-39793 to the Known Exploited Vulnerabilities catalog on 11 Apr 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2021-39793 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2021-39793?

Apply updates per vendor instructions. Check Google's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Pixel and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in April 2022 · Google scorecard · act-now radar.

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