CVE-2021-3347
CVSS v3
7.8
HIGH
EPSS Score
1.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An issue was discovered in the Linux kernel through 5.10.11. PI futexes have a kernel stack use-after-free during fault handling, allowing local users to execute code in the kernel, aka CID-34b1a1ce1458.
Technical details
- Published
- 2021-01-29
Frequently asked questions
What is CVE-2021-3347?
An issue was discovered in the Linux kernel through 5.10.11. PI futexes have a kernel stack use-after-free during fault handling, allowing local users to execute code in the kernel, aka CID-34b1a1ce1458.
Is CVE-2021-3347 actively exploited?
Active exploitation of CVE-2021-3347 has not been confirmed. Its EPSS score was 1.4% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-3347?
CVE-2021-3347 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2021-3347 affecting your environment?
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