CVE-2024-56650

Kernel disclosure and crash via unterminated LED ID

Published Dec 27, 2024 · Updated Aug 5, 2026

Out-of-bounds read in Linux netfilter allows local users to disclose kernel heap data or crash the system through a crafted LED target. The led_tg_check() function passes a fixed-size userspace LED ID without a NUL terminator to kstrdup(), whose strlen() scan reads past the buffer. A local user can reach the path through netfilter rule creation with CAP_NET_ADMIN in a user namespace; impact is limited to kernel-data disclosure and system interruption.

CVSS severity7.1
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds read in Linux netfilter allows local users to disclose kernel heap data or crash the system through a crafted LED target. The led_tg_check() function passes a fixed-size userspace LED ID without a NUL terminator to kstrdup(), whose strlen() scan reads past the buffer. A local user can reach the path through netfilter rule creation with CAP_NET_ADMIN in a user namespace; impact is limited to kernel-data disclosure and system interruption.

The record

CVE
CVE-2024-56650
Published
Dec 27, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 2024CVE 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=2.6.30
  2. Affected versionversion=268cb38e1802db560c73167e643f14a3dcb4b07c <04317f4eb2aad312ad85c1a17ad81fe75f1f9bc7
  3. Affected versionversion=268cb38e1802db560c73167e643f14a3dcb4b07c <147a42bb02de8735cb08476be6d0917987d022c2
  4. Affected versionversion=268cb38e1802db560c73167e643f14a3dcb4b07c <36a9d94dac28beef6b8abba46ba8874320d3e800
  5. Affected versionversion=268cb38e1802db560c73167e643f14a3dcb4b07c <a9bcc0b70d9baf3ff005874489a0dc9d023b54c3
  6. Affected versionversion=268cb38e1802db560c73167e643f14a3dcb4b07c <ab9916321c95f5280b72b4c5055e269f98627efe
  7. Affected versionversion=268cb38e1802db560c73167e643f14a3dcb4b07c <ad28612ebae1fcc1104bd432e99e99d87f6bfe09
  8. Affected versionversion=268cb38e1802db560c73167e643f14a3dcb4b07c <c40c96d98e536fc1daaa125c2332b988615e30a4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.30; version=268cb38e1802db560c73167e643f14a3dcb4b07c <04317f4eb2aad312ad85c1a17ad81fe75f1f9bc7; version=268cb38e1802db560c73167e643f14a3dcb4b07c <147a42bb02de8735cb08476be6d0917987d022c2; version=268cb38e1802db560c73167e643f14a3dcb4b07c <36a9d94dac28beef6b8abba46ba8874320d3e800; version=268cb38e1802db560c73167e643f14a3dcb4b07c <a9bcc0b70d9baf3ff005874489a0dc9d023b54c3; version=268cb38e1802db560c73167e643f14a3dcb4b07c <ab9916321c95f5280b72b4c5055e269f98627efe; version=268cb38e1802db560c73167e643f14a3dcb4b07c <ad28612ebae1fcc1104bd432e99e99d87f6bfe09; version=268cb38e1802db560c73167e643f14a3dcb4b07c <c40c96d98e536fc1daaa125c2332b988615e30a4

Published CVSS scores

7.1CISA ADP VulnrichmentCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.1Linux Kernel CNACVSS: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.

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-125Out-of-bounds Read
T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo