What is CVE-2026-31717?

CVE-2026-31717 is a high-severity vulnerability in Linux. CVSS score: 8.8/10. Published 2026-05-01.

How severe is CVE-2026-31717?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2026-31717 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux

CVE-2026-31717

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate owner of durable handle on reconnect Currently, ksmbd does not verify if the user attempting to reconnect to a durable handle is the same user who origin…

EPSS: 0.001 (18.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 8df4bcdb0a4232192b2445256c39b787d58ef14d, 7.1-rc1, 6.6.142
Linux Linux_kernel — versions 7.1

Public proof-of-concept exploits

TurtleARM/CVE-2026-31717-KSMBD-Exploit

References

Frequently asked questions

What is CVE-2026-31717?: CVE-2026-31717 is a high-severity vulnerability in Linux. CVSS score: 8.8/10. Published 2026-05-01.
How severe is CVE-2026-31717?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2026-31717 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.