CVE-2026-72473

Kernel memory corruption via premature request recycling

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in the Linux kernel xprtrdma transport allows local users to corrupt kernel memory through concurrent RPC and DMA activity. The Reply handler drops rl_kref and recycles an rpcrdma_req while an HCA can still DMA-read its send buffer because Send-side references were conditional. Exploitation requires local low-privileged access and an active RPC-over-RDMA path; resulting corruption can crash or destabilize the system.

CVSS severity7.0
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel xprtrdma transport allows local users to corrupt kernel memory through concurrent RPC and DMA activity. The Reply handler drops rl_kref and recycles an rpcrdma_req while an HCA can still DMA-read its send buffer because Send-side references were conditional. Exploitation requires local low-privileged access and an active RPC-over-RDMA path; resulting corruption can crash or destabilize the system.

The record

CVE
CVE-2026-72473
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-911
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=0ab115237025f5e379620bbcd56a02697d07b002 <53442c7d0c888e51b8bc3da196970a669cc6b294
  2. Affected versionversion=0ab115237025f5e379620bbcd56a02697d07b002 <740975054a1970c0cf15f70ac39724a064f45847
  3. Affected versionversion=0ab115237025f5e379620bbcd56a02697d07b002 <8203f760a72bd39a3b66bc4eff0aa272a99fe22b
  4. Affected versionversion=0ab115237025f5e379620bbcd56a02697d07b002 <9f3d9b68c1c6c51746e5ecdb52b2e6a2901de37e
  5. Affected versionversion=0ab115237025f5e379620bbcd56a02697d07b002 <e7632089523acddcdd8f090ad19e96fb3107b04d
  6. Affected versionversion=0ab115237025f5e379620bbcd56a02697d07b002 <e786233d2e0bbff9a82e43f02ae3a46ab4b08ec3
  7. Affected versionversion=5.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0ab115237025f5e379620bbcd56a02697d07b002 <53442c7d0c888e51b8bc3da196970a669cc6b294; version=0ab115237025f5e379620bbcd56a02697d07b002 <740975054a1970c0cf15f70ac39724a064f45847; version=0ab115237025f5e379620bbcd56a02697d07b002 <8203f760a72bd39a3b66bc4eff0aa272a99fe22b; version=0ab115237025f5e379620bbcd56a02697d07b002 <9f3d9b68c1c6c51746e5ecdb52b2e6a2901de37e; version=0ab115237025f5e379620bbcd56a02697d07b002 <e7632089523acddcdd8f090ad19e96fb3107b04d; version=0ab115237025f5e379620bbcd56a02697d07b002 <e786233d2e0bbff9a82e43f02ae3a46ab4b08ec3; version=5.3

Published CVSS scores

5.8Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
7.0Oracle LinuxCVSS:3.1/AV:L/AC:H/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.

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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-911Improper Update of Reference Count

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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