CVE-2026-72500

Kernel memory corruption via premature SRQ page free

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in the Linux kernel bnxt_re RDMA driver 6.12 allows local users to corrupt kernel memory during SRQ teardown. In bnxt_re_destroy_srq(), free_page() releases the SRQ toggle page before bnxt_qplib_destroy_srq() completes, so a concurrent NQ interrupt writes toggle values through a stale mapping. Exploitation requires low-privileged local access, an SRQ using the bnxt_re toggle feature, and a notification interrupt during firmware teardown.

CVSS severity8.8
High
EPSS probability0.16%
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 bnxt_re RDMA driver 6.12 allows local users to corrupt kernel memory during SRQ teardown. In bnxt_re_destroy_srq(), free_page() releases the SRQ toggle page before bnxt_qplib_destroy_srq() completes, so a concurrent NQ interrupt writes toggle values through a stale mapping. Exploitation requires low-privileged local access, an SRQ using the bnxt_re toggle feature, and a notification interrupt during firmware teardown.

The record

CVE
CVE-2026-72500
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
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=181028a0d84cdcc7ac86d05cc49eaa416ce85c8b <0adcd67f3d6f84835be682da0153f57f5c2f8036
  2. Affected versionversion=181028a0d84cdcc7ac86d05cc49eaa416ce85c8b <104a7ff382a58a83cae018925e3574c784e8274c
  3. Affected versionversion=181028a0d84cdcc7ac86d05cc49eaa416ce85c8b <131e2918b9b0529687e67e2e58047304027f095a
  4. Affected versionversion=6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=181028a0d84cdcc7ac86d05cc49eaa416ce85c8b <0adcd67f3d6f84835be682da0153f57f5c2f8036; version=181028a0d84cdcc7ac86d05cc49eaa416ce85c8b <104a7ff382a58a83cae018925e3574c784e8274c; version=181028a0d84cdcc7ac86d05cc49eaa416ce85c8b <131e2918b9b0529687e67e2e58047304027f095a; version=6.12

Published CVSS scores

8.8Linux CNACVSS:3.1/AV:L/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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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Your stack

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