CVE-2024-50126Public exploit

Kernel memory disclosure via unlocked taprio traversal

Published Nov 5, 2024 · Updated Aug 5, 2026

A use-after-free in Linux kernel 6.1 through 6.12-rc4 allows local users to disclose kernel memory or crash the system. taprio_dump traverses a schedule while taprio_change can replace and defer-free it because the dump path lacks an RCU read-side critical section. An unprivileged local process can create user and network namespaces, race qdisc display against schedule replacement, and trigger stale kernel-slab reads.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A use-after-free in Linux kernel 6.1 through 6.12-rc4 allows local users to disclose kernel memory or crash the system. taprio_dump traverses a schedule while taprio_change can replace and defer-free it because the dump path lacks an RCU read-side critical section. An unprivileged local process can create user and network namespaces, race qdisc display against schedule replacement, and trigger stale kernel-slab reads.

The record

CVE
CVE-2024-50126
Published
Nov 5, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 5, 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=18cdd2f0998a4967b1fff4c43ed9aef049e42c39 <5d282467245f267c0b9ada3f7f309ff838521536
  2. Affected versionversion=18cdd2f0998a4967b1fff4c43ed9aef049e42c39 <b22db8b8befe90b61c98626ca1a2fbb0505e9fe3
  3. Affected versionversion=18cdd2f0998a4967b1fff4c43ed9aef049e42c39 <b911fa9e92ee586e36479ad57b88f20471acaca1
  4. Affected versionversion=18cdd2f0998a4967b1fff4c43ed9aef049e42c39 <e4369cb6acf6b895ac2453cc1cdf2f4326122c6d
  5. Affected versionversion=6.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=18cdd2f0998a4967b1fff4c43ed9aef049e42c39 <5d282467245f267c0b9ada3f7f309ff838521536; version=18cdd2f0998a4967b1fff4c43ed9aef049e42c39 <b22db8b8befe90b61c98626ca1a2fbb0505e9fe3; version=18cdd2f0998a4967b1fff4c43ed9aef049e42c39 <b911fa9e92ee586e36479ad57b88f20471acaca1; version=18cdd2f0998a4967b1fff4c43ed9aef049e42c39 <e4369cb6acf6b895ac2453cc1cdf2f4326122c6d; version=6.1

Published CVSS scores

7.8UbuntuCVSS: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.

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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 exploitPublished

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

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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