What is CVE-2026-45856?

CVE-2026-45856 is a high-severity vulnerability in Linux. CVSS score: 7.1/10. Published 2026-05-27.

How severe is CVE-2026-45856?

High severity. CVSS v3 base score is 7.1 out of 10.

Vulnerability in Linux

CVE-2026-45856

In the Linux kernel, the following vulnerability has been resolved: RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send ib_uverbs_post_send() uses cmd.wqe_size from userspace without any validation before passing it to…

EPSS: 0.000 (2.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

Linux — versions c3bea3d2dc5358e05541527283279102383b0231, 5.0, 0

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67

Frequently asked questions

What is CVE-2026-45856?: CVE-2026-45856 is a high-severity vulnerability in Linux. CVSS score: 7.1/10. Published 2026-05-27.
How severe is CVE-2026-45856?: High severity. CVSS v3 base score is 7.1 out of 10.