CVE-2026-72501

Kernel-memory disclosure via uninitialized dpi copy

Published Aug 15, 2026 · Updated Aug 15, 2026

Use of an uninitialized variable in the Linux kernel bnxt_re driver allows local users to read stale kernel-stack data. In drivers/infiniband/hw/bnxt_re/uapi.c, the ucontext allocation path initializes dpi only for BNXT_RE_ALLOC_WC_PAGE but copies it into every userspace response. Access requires the bnxt_re RDMA userspace interface on supported Broadcom NetXtreme-E RoCE hardware, and the disclosed value is limited to stale kernel-stack data.

CVSS severity6.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of an uninitialized variable in the Linux kernel bnxt_re driver allows local users to read stale kernel-stack data. In drivers/infiniband/hw/bnxt_re/uapi.c, the ucontext allocation path initializes dpi only for BNXT_RE_ALLOC_WC_PAGE but copies it into every userspace response. Access requires the bnxt_re RDMA userspace interface on supported Broadcom NetXtreme-E RoCE hardware, and the disclosed value is limited to stale kernel-stack data.

The record

CVE
CVE-2026-72501
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-457
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=360da60d6c6edb9740de7a8e6d8969d62ceff956 <3d00b375853fbbf4157ad092884b4ed9a49429c1
  2. Affected versionversion=360da60d6c6edb9740de7a8e6d8969d62ceff956 <978b27d6ce538bb832ccd69e45802824e4301c4b
  3. Affected versionversion=360da60d6c6edb9740de7a8e6d8969d62ceff956 <b87cbd4d198ae377be4815d8102fa9dfefb91dcc
  4. Affected versionversion=6.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=360da60d6c6edb9740de7a8e6d8969d62ceff956 <3d00b375853fbbf4157ad092884b4ed9a49429c1; version=360da60d6c6edb9740de7a8e6d8969d62ceff956 <978b27d6ce538bb832ccd69e45802824e4301c4b; version=360da60d6c6edb9740de7a8e6d8969d62ceff956 <b87cbd4d198ae377be4815d8102fa9dfefb91dcc; version=6.5

Published CVSS scores

6.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-457Use of Uninitialized Variable

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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