What is CVE-2026-31538?

CVE-2026-31538 is a high-severity vulnerability in Linux. CVSS score: 7.5/10. Published 2026-04-24.

How severe is CVE-2026-31538?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Linux

CVE-2026-31538

In the Linux kernel, the following vulnerability has been resolved: smb: server: make use of smbdirect_socket.recv_io.credits.available The logic off managing recv credits by counting posted recv_io and granted credits is racy. That's b…

EPSS: 0.001 (17.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 89b021a72663c4d96d8a8b85272bb42d991a1c6f, 6.18, 0
Linux Linux_kernel

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-31538?: CVE-2026-31538 is a high-severity vulnerability in Linux. CVSS score: 7.5/10. Published 2026-04-24.
How severe is CVE-2026-31538?: High severity. CVSS v3 base score is 7.5 out of 10.