CVE-2023-53659Public exploit

Kernel disclosure and crash via stale queue count

Published Oct 7, 2025 · Updated Oct 7, 2025

Out-of-bounds access in the Linux kernel iavf driver allows local users to disclose kernel memory or crash the host during VF removal. On a reset timeout, iavf_set_channels updates num_active_queues without reallocating tx_rings and rx_rings, so later cleanup and statistics paths index beyond those arrays. Triggering requires an iavf-backed SR-IOV virtual function, local channel-setting access, and a concurrent reset or removal stall; the resulting slab access can panic the kernel.

CVSS severity7.1
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

Out-of-bounds access in the Linux kernel iavf driver allows local users to disclose kernel memory or crash the host during VF removal. On a reset timeout, iavf_set_channels updates num_active_queues without reallocating tx_rings and rx_rings, so later cleanup and statistics paths index beyond those arrays. Triggering requires an iavf-backed SR-IOV virtual function, local channel-setting access, and a concurrent reset or removal stall; the resulting slab access can panic the kernel.

The record

CVE
CVE-2023-53659
Published
Oct 7, 2025
Updated
Oct 7, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 7, 2025Record 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=1555d83ddbb7204ef60c58aee6ca3bbef2c5e99f <b92defe4e8ee86996c16417ad8c804cb4395fddd
  2. Affected versionversion=4e5e6b5d9d1334d3490326b6922a2daaf56a867f <65ecebc9ac09427b2c65f271cd5e5bd536c3fe38
  3. Affected versionversion=4e5e6b5d9d1334d3490326b6922a2daaf56a867f <6e1d8f1332076a002e6d910d255aa5903d341c56
  4. Affected versionversion=4e5e6b5d9d1334d3490326b6922a2daaf56a867f <7c4bced3caa749ce468b0c5de711c98476b23a52
  5. Affected versionversion=5.16
  6. Affected versionversion=68d4274034e618b7f190dc9fbfc4f3436a7430f4 <0fb37ce6c01e17839e26d03222f0b44e6a3ed2b9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1555d83ddbb7204ef60c58aee6ca3bbef2c5e99f <b92defe4e8ee86996c16417ad8c804cb4395fddd; version=4e5e6b5d9d1334d3490326b6922a2daaf56a867f <65ecebc9ac09427b2c65f271cd5e5bd536c3fe38; version=4e5e6b5d9d1334d3490326b6922a2daaf56a867f <6e1d8f1332076a002e6d910d255aa5903d341c56; version=4e5e6b5d9d1334d3490326b6922a2daaf56a867f <7c4bced3caa749ce468b0c5de711c98476b23a52; version=5.16; version=68d4274034e618b7f190dc9fbfc4f3436a7430f4 <0fb37ce6c01e17839e26d03222f0b44e6a3ed2b9

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.1UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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 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 exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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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