CVE-2026-72045

Cross-PF memory access via unsanitized function index

Published Aug 15, 2026 · Updated Aug 15, 2026

Improper index validation in the Linux kernel octeontx2-af component allows local users with VF access to reach another function's LMTLINE mapping. rvu_mbox_handler_lmtst_tbl_setup() trusts the unauthenticated req->base_pcifunc payload as a direct LMT table index and copies the selected physical base address into the caller's map entry. Exploitation requires access to a CN10K virtual function and crosses its assigned PF boundary, exposing another function's mapping and enabling access to sensitive system memory.

CVSS severity8.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper index validation in the Linux kernel octeontx2-af component allows local users with VF access to reach another function's LMTLINE mapping. rvu_mbox_handler_lmtst_tbl_setup() trusts the unauthenticated req->base_pcifunc payload as a direct LMT table index and copies the selected physical base address into the caller's map entry. Exploitation requires access to a CN10K virtual function and crosses its assigned PF boundary, exposing another function's mapping and enabling access to sensitive system memory.

The record

CVE
CVE-2026-72045
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-1285, 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=5.14
  2. Affected versionversion=893ae97214c385be02f8ec097298cc48c7f0d905 <54535692bec9ef464adc714108eb19e49e38b5a2
  3. Affected versionversion=893ae97214c385be02f8ec097298cc48c7f0d905 <59da37fee81a8d76079313348ca13c5bc90dd6ae
  4. Affected versionversion=893ae97214c385be02f8ec097298cc48c7f0d905 <8cdcf3d2caacdee7ddd363705fb4d93b0c1a0915
  5. Affected versionversion=893ae97214c385be02f8ec097298cc48c7f0d905 <c73b8795b45f4ad5a95120d2e9b435ea4616e08e
  6. Affected versionversion=893ae97214c385be02f8ec097298cc48c7f0d905 <e9c5b03208507dd6d58b0c23a2c60b5c2f4c1b11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=893ae97214c385be02f8ec097298cc48c7f0d905 <54535692bec9ef464adc714108eb19e49e38b5a2; version=893ae97214c385be02f8ec097298cc48c7f0d905 <59da37fee81a8d76079313348ca13c5bc90dd6ae; version=893ae97214c385be02f8ec097298cc48c7f0d905 <8cdcf3d2caacdee7ddd363705fb4d93b0c1a0915; version=893ae97214c385be02f8ec097298cc48c7f0d905 <c73b8795b45f4ad5a95120d2e9b435ea4616e08e; version=893ae97214c385be02f8ec097298cc48c7f0d905 <e9c5b03208507dd6d58b0c23a2c60b5c2f4c1b11

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8kernel.org via cve.orgCVSS: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.

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

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-1285Improper Validation of Specified Index, Position, or Offset in Input
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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