CVE-2023-52626

Kernel data disclosure via misapplied pointer increment

Published Mar 26, 2024 · Updated May 23, 2026

Out-of-bounds read in affected Linux 6.5.13, 6.6, and 6.7 kernels allows local users to read beyond an mlx5e metadata buffer. The mlx5e port-timestamp NAPI poll path applies postfix increment to the size pointer before dereferencing it, rather than incrementing the referenced counter. The path requires local low-privileged access and mlx5e port timestamping; bounded consequences are data disclosure or a kernel crash, without data modification.

CVSS severity7.1
High
EPSS probability0.24%
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 read in affected Linux 6.5.13, 6.6, and 6.7 kernels allows local users to read beyond an mlx5e metadata buffer. The mlx5e port-timestamp NAPI poll path applies postfix increment to the size pointer before dereferencing it, rather than incrementing the referenced counter. The path requires local low-privileged access and mlx5e port timestamping; bounded consequences are data disclosure or a kernel crash, without data modification.

The record

CVE
CVE-2023-52626
Published
Mar 26, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 26, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=42b11d1293e5a0f932c0b6e891b2c7bae57b839d
  2. Affected versionversion=6.5.13 <6.6
  3. Affected versionversion=6.6.3 <6.6.15
  4. Affected versionversion=6.7
  5. Affected versionversion=92214be5979c0961a471b7eaaaeacab41bdf456c <33cdeae8c6fb58cc445f859b67c014dc9f60b4e0
  6. Affected versionversion=92214be5979c0961a471b7eaaaeacab41bdf456c <3876638b2c7ebb2c9d181de1191db0de8cac143a
  7. Affected versionversion=e5d30f7da35720060299483e65fc372980a82dfb <40e0d0746390c5b0c31144f4f1688d72f3f8d790

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=42b11d1293e5a0f932c0b6e891b2c7bae57b839d; version=6.5.13 <6.6; version=6.6.3 <6.6.15; version=6.7; version=92214be5979c0961a471b7eaaaeacab41bdf456c <33cdeae8c6fb58cc445f859b67c014dc9f60b4e0; version=92214be5979c0961a471b7eaaaeacab41bdf456c <3876638b2c7ebb2c9d181de1191db0de8cac143a; version=e5d30f7da35720060299483e65fc372980a82dfb <40e0d0746390c5b0c31144f4f1688d72f3f8d790

Published CVSS scores

7.1NVDCVSS: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 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-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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