CVE-2026-53187

medium Red Hat
CVSS v3 Base Score
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.2%
Exploitation probability in 30 days
Top 93% most likely to be exploited
Attack Characteristics
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: June 25, 2026 (14 days ago)
Last Modified: June 25, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in the Linux kernel's RDMA/core component. A local attacker could supply an invalid `cpu_id` through the `UVERBS_ATTR_ALLOC_DMAH_CPU_ID` attribute without proper validation. This improper validation could lead to an out-of-bounds read of the `cpumask` bitmap. On systems configured with `CONFIG_DEBUG_PER_CPU_MAPS` and `panic_on_warn`, this vulnerability could result in a system reboot, leading to a denial of service.

CWE

CWE-125

Affected Products

Red Hat Enterprise Linux 10Red Hat Enterprise Linux 6Red Hat Enterprise Linux 7Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 lore.kernel.org