CVE-2026-93154Hinoki check available

Local kernel memory corruption via premature MR deregistration

Published Sep 17, 2026 · Updated Sep 18, 2026

Use-after-free in the Linux irdma driver allows local users to corrupt kernel memory through a crafted RDMA userspace request. The irdma_get_pbl path associates a QP, CQ, or SRQ ring memory region, but irdma_dereg_mr frees it without retaining a reference for the live ring. Access to an irdma uverbs device is required; subsequent NIC DMA can read or overwrite recycled memory or panic the host.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Use-after-free in the Linux irdma driver allows local users to corrupt kernel memory through a crafted RDMA userspace request. The irdma_get_pbl path associates a QP, CQ, or SRQ ring memory region, but irdma_dereg_mr frees it without retaining a reference for the live ring. Access to an irdma uverbs device is required; subsequent NIC DMA can read or overwrite recycled memory or panic the host.

The record

CVE
CVE-2026-93154
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.14
  2. Affected versionversion=b48c24c2d710cf34810c555dcef883a3d35a9c08 <07974c267f603a76aead348bca97deee95efdcc9
  3. Affected versionversion=b48c24c2d710cf34810c555dcef883a3d35a9c08 <a6c0e693a7c881bfa43ac74cbcad1f8e10f1382b
  4. Affected versionversion=b48c24c2d710cf34810c555dcef883a3d35a9c08 <f67d8a08f60c9217df6d40da56422d2049f5e334

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=b48c24c2d710cf34810c555dcef883a3d35a9c08 <07974c267f603a76aead348bca97deee95efdcc9; version=b48c24c2d710cf34810c555dcef883a3d35a9c08 <a6c0e693a7c881bfa43ac74cbcad1f8e10f1382b; version=b48c24c2d710cf34810c555dcef883a3d35a9c08 <f67d8a08f60c9217df6d40da56422d2049f5e334

Published CVSS scores

7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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