CVE-2024-50256

Kernel crash via insufficient reset headroom

Published Nov 9, 2024 · Updated Aug 5, 2026

Denial of service in the Linux kernel allows local users to crash the system by triggering IPv6 netfilter packet rejection. In nf_send_reset6(), a device with hard_header_len set to zero leaves the socket buffer without enough headroom, and a later Ethernet-header push triggers skb_under_panic. Reachability requires local low-privileged access and an affected path that sends an IPv6 reset through such a device.

CVSS severity5.5
Medium
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel allows local users to crash the system by triggering IPv6 netfilter packet rejection. In nf_send_reset6(), a device with hard_header_len set to zero leaves the socket buffer without enough headroom, and a later Ethernet-header push triggers skb_under_panic. Reachability requires local low-privileged access and an affected path that sends an IPv6 reset through such a device.

The record

CVE
CVE-2024-50256
Published
Nov 9, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 9, 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

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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=3.18
  2. Affected versionversion=c8d7b98bec43faaa6583c3135030be5eb4693acb <4ed234fe793f27a3b151c43d2106df2ff0d81aac
  3. Affected versionversion=c8d7b98bec43faaa6583c3135030be5eb4693acb <4f7b586aae53c2ed820661803da8ce18b1361921
  4. Affected versionversion=c8d7b98bec43faaa6583c3135030be5eb4693acb <f85b057e34419e5ec0583a65078a11ccc1d4540a
  5. Affected versionversion=c8d7b98bec43faaa6583c3135030be5eb4693acb <fef63832317d9d24e1214cdd8f204d02ebdf8499

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.18; version=c8d7b98bec43faaa6583c3135030be5eb4693acb <4ed234fe793f27a3b151c43d2106df2ff0d81aac; version=c8d7b98bec43faaa6583c3135030be5eb4693acb <4f7b586aae53c2ed820661803da8ce18b1361921; version=c8d7b98bec43faaa6583c3135030be5eb4693acb <f85b057e34419e5ec0583a65078a11ccc1d4540a; version=c8d7b98bec43faaa6583c3135030be5eb4693acb <fef63832317d9d24e1214cdd8f204d02ebdf8499

Published CVSS scores

6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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 exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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