CVE-2026-23289

Local service interruption via leaked user database mapping

Published Mar 25, 2026 · Updated Mar 25, 2026

Resource leak in the Linux kernel mthca InfiniBand driver allows local users to exhaust resources through a failed SRQ creation call. When mthca_create_srq() maps a user database but ib_copy_to_udata() fails, the error path frees the SRQ without calling mthca_unmap_user_db(). A low-privileged local user with access to an mthca RDMA device can repeat the failing call, leaking mappings and eventually interrupting system availability.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the Linux kernel mthca InfiniBand driver allows local users to exhaust resources through a failed SRQ creation call. When mthca_create_srq() maps a user database but ib_copy_to_udata() fails, the error path frees the SRQ without calling mthca_unmap_user_db(). A low-privileged local user with access to an mthca RDMA device can repeat the failing call, leaking mappings and eventually interrupting system availability.

The record

CVE
CVE-2026-23289
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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=2.6.14
  2. Affected versionversion=ec34a922d243c3401a694450734e9effb2bafbfe <117942ca43e2e3c3d121faae530989931b7f67e1
  3. Affected versionversion=ec34a922d243c3401a694450734e9effb2bafbfe <972b72d7e2d8fe1400f1c7a8304c282c539b7e02
  4. Affected versionversion=ec34a922d243c3401a694450734e9effb2bafbfe <d0148965dbca8cc8efa7e3d6e99940487bf661c0
  5. Affected versionversion=ec34a922d243c3401a694450734e9effb2bafbfe <da8eaa73bc37d004350ba68eb18b6ade8e49db52
  6. Affected versionversion=ec34a922d243c3401a694450734e9effb2bafbfe <deee46b37ebd8cc5ff810127883fca90f2412a7b
  7. Affected versionversion=ec34a922d243c3401a694450734e9effb2bafbfe <f67f1ad4029e9fa183141546de31987b254c9292

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2.6.14; version=ec34a922d243c3401a694450734e9effb2bafbfe <117942ca43e2e3c3d121faae530989931b7f67e1; version=ec34a922d243c3401a694450734e9effb2bafbfe <972b72d7e2d8fe1400f1c7a8304c282c539b7e02; version=ec34a922d243c3401a694450734e9effb2bafbfe <d0148965dbca8cc8efa7e3d6e99940487bf661c0; version=ec34a922d243c3401a694450734e9effb2bafbfe <da8eaa73bc37d004350ba68eb18b6ade8e49db52; version=ec34a922d243c3401a694450734e9effb2bafbfe <deee46b37ebd8cc5ff810127883fca90f2412a7b; version=ec34a922d243c3401a694450734e9effb2bafbfe <f67f1ad4029e9fa183141546de31987b254c9292

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Oracle LinuxCVSS: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
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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