What is CVE-2026-53187?

CVE-2026-53187 is a high-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 7.1/10. Published 2026-06-25.

How severe is CVE-2026-53187?

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

Buffer overflow in Linux

CVE-2026-53187

In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Validate cpu_id against nr_cpu_ids in DMAH alloc The cpu_id attribute supplied by user space through UVERBS_ATTR_ALLOC_DMAH_CPU_ID is passed directly to cpuma…

Vulnerability class: Buffer Overflow

EPSS: 0.001 (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 d83edab562a496a42720902a1d2effccd05c37c5, 6.17, 0
Linux Linux_kernel — versions 7.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

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-2026-53187?: CVE-2026-53187 is a high-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 7.1/10. Published 2026-06-25.
How severe is CVE-2026-53187?: High severity. CVSS v3 base score is 7.1 out of 10.