CVE-2026-72495

Local RDMA denial via repeated WC allocation

Published Aug 15, 2026 · Updated Aug 15, 2026

Resource exhaustion in the Linux kernel's bnxt_re driver allows local users to interrupt RDMA service through repeated WC page requests. The BNXT_RE_METHOD_ALLOC_PAGE path accepts repeated or concurrent WC allocations for one ucontext without a duplicate check or lock, consuming finite doorbell page indices and racing shared wcdpi state. Reachability requires local access to a bnxt_re-backed uverbs device; exhaustion denies RDMA service and unsynchronized teardown can corrupt doorbell bookkeeping.

CVSS severity9.3
Critical
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in the Linux kernel's bnxt_re driver allows local users to interrupt RDMA service through repeated WC page requests. The BNXT_RE_METHOD_ALLOC_PAGE path accepts repeated or concurrent WC allocations for one ucontext without a duplicate check or lock, consuming finite doorbell page indices and racing shared wcdpi state. Reachability requires local access to a bnxt_re-backed uverbs device; exhaustion denies RDMA service and unsynchronized teardown can corrupt doorbell bookkeeping.

The record

CVE
CVE-2026-72495
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-770, CAPEC-130, T1499.003
Attack vector
local
Privileges
unauthenticated

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 <441baa79043431807115fd030d7d0bb14ed441a0
  2. Affected versionversion=360da60d6c6edb9740de7a8e6d8969d62ceff956 <478c4d24193fe3e6aa2accd4874ae43000e4a217
  3. Affected versionversion=360da60d6c6edb9740de7a8e6d8969d62ceff956 <da406b8b49c1dfe661a497483940d7ee781430db
  4. Affected versionversion=6.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=360da60d6c6edb9740de7a8e6d8969d62ceff956 <441baa79043431807115fd030d7d0bb14ed441a0; version=360da60d6c6edb9740de7a8e6d8969d62ceff956 <478c4d24193fe3e6aa2accd4874ae43000e4a217; version=360da60d6c6edb9740de7a8e6d8969d62ceff956 <da406b8b49c1dfe661a497483940d7ee781430db; version=6.5

Published CVSS scores

3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
9.3Linux CNACVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CAPEC-130Excessive Allocation
T1499.003Endpoint Denial of Service: Application Exhaustion Flood

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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