CVE-2024-57801

Kernel use-after-free via unloaded vport representor access

Published Jan 15, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux mlx5e driver allows local users to access freed kernel memory while a vport representor is unloaded. During unregister_netdev, the restore path dereferences rpriv->netdev or walks rpriv->tc_ht after mlx5e_rep_priv is freed, without first checking REP_LOADED. Reachability requires mlx5 eSwitch representor functionality and driver unload; published sources document no reliable exploit beyond the invalid freed-memory access.

CVSS severity7.8
High
EPSS probability0.22%
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 mlx5e driver allows local users to access freed kernel memory while a vport representor is unloaded. During unregister_netdev, the restore path dereferences rpriv->netdev or walks rpriv->tc_ht after mlx5e_rep_priv is freed, without first checking REP_LOADED. Reachability requires mlx5 eSwitch representor functionality and driver unload; published sources document no reliable exploit beyond the invalid freed-memory access.

The record

CVE
CVE-2024-57801
Published
Jan 15, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.6
  2. Affected versionversion=d1569537a837d66620aa7ffc2bddf918e902f227 <3e45dd1622a2c1a83c11bf42fdd8c1810123d6c0
  3. Affected versionversion=d1569537a837d66620aa7ffc2bddf918e902f227 <47c78d3fc26e38ab805613a0f592dc8a820c7c64
  4. Affected versionversion=d1569537a837d66620aa7ffc2bddf918e902f227 <5a03b368562a7ff5f5f1f63b5adf8309cbdbd5be

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=d1569537a837d66620aa7ffc2bddf918e902f227 <3e45dd1622a2c1a83c11bf42fdd8c1810123d6c0; version=d1569537a837d66620aa7ffc2bddf918e902f227 <47c78d3fc26e38ab805613a0f592dc8a820c7c64; version=d1569537a837d66620aa7ffc2bddf918e902f227 <5a03b368562a7ff5f5f1f63b5adf8309cbdbd5be

Published CVSS scores

7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISACVSS:3.1/AV:L/AC:L/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.

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-416Use After Free

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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