CVE-2024-56614

Kernel memory corruption via negative XSK map index

Published Dec 27, 2024 · Updated May 11, 2026

Out-of-bounds write in Linux kernel AF_XDP map deletion allows local users to corrupt kernel memory through a negative map key. xsk_map_delete_elem converts a 32-bit unsigned key to signed int, letting negative indices pass an unsigned bounds comparison before xchg writes outside m->xsk_map. Reaching the flaw requires local low-privileged access to issue BPF map operations; successful triggering corrupts kernel memory and can crash the host.

CVSS severity7.8
High
EPSS probability0.26%
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 write in Linux kernel AF_XDP map deletion allows local users to corrupt kernel memory through a negative map key. xsk_map_delete_elem converts a 32-bit unsigned key to signed int, letting negative indices pass an unsigned bounds comparison before xchg writes outside m->xsk_map. Reaching the flaw requires local low-privileged access to issue BPF map operations; successful triggering corrupts kernel memory and can crash the host.

The record

CVE
CVE-2024-56614
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.18
  2. Affected versionversion=fbfc504a24f53f7ebe128ab55cb5dba634f4ece8 <32cd3db7de97c0c7a018756ce66244342fd583f0
  3. Affected versionversion=fbfc504a24f53f7ebe128ab55cb5dba634f4ece8 <4d03f705e9d7aabebc6bfa5810f8aab6d176cbb7
  4. Affected versionversion=fbfc504a24f53f7ebe128ab55cb5dba634f4ece8 <d486b5741d987d3e0e6be4ac22cafdf94e6d1a47
  5. Affected versionversion=fbfc504a24f53f7ebe128ab55cb5dba634f4ece8 <ed08c93d5a9801cc8f224a046411fd603c538d07
  6. Affected versionversion=fbfc504a24f53f7ebe128ab55cb5dba634f4ece8 <f8abd03f83d5fe81e76eb93e2c4373eb9f75fd8a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.18; version=fbfc504a24f53f7ebe128ab55cb5dba634f4ece8 <32cd3db7de97c0c7a018756ce66244342fd583f0; version=fbfc504a24f53f7ebe128ab55cb5dba634f4ece8 <4d03f705e9d7aabebc6bfa5810f8aab6d176cbb7; version=fbfc504a24f53f7ebe128ab55cb5dba634f4ece8 <d486b5741d987d3e0e6be4ac22cafdf94e6d1a47; version=fbfc504a24f53f7ebe128ab55cb5dba634f4ece8 <ed08c93d5a9801cc8f224a046411fd603c538d07; version=fbfc504a24f53f7ebe128ab55cb5dba634f4ece8 <f8abd03f83d5fe81e76eb93e2c4373eb9f75fd8a

Published CVSS scores

7.8CanonicalCVSS: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-787Out-of-bounds Write
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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