CVE-2024-56675

Kernel memory corruption via BPF uprobe UAF

Published Dec 27, 2024 · Updated May 11, 2026

Use-after-free in Linux kernel BPF uprobe handling from 6.0 allows local users to corrupt kernel memory through attached BPF programs. Uprobes run under tasks-trace RCU, but detachment freed non-sleepable bpf_prog objects after only a normal RCU grace period, allowing later uprobe execution to dereference freed memory. Reachability requires permission to load and attach a BPF program to a uprobe; successful reuse can crash the kernel or compromise kernel memory.

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

Use-after-free in Linux kernel BPF uprobe handling from 6.0 allows local users to corrupt kernel memory through attached BPF programs. Uprobes run under tasks-trace RCU, but detachment freed non-sleepable bpf_prog objects after only a normal RCU grace period, allowing later uprobe execution to dereference freed memory. Reachability requires permission to load and attach a BPF program to a uprobe; successful reuse can crash the kernel or compromise kernel memory.

The record

CVE
CVE-2024-56675
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, 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=6.0
  2. Affected versionversion=8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 <9245459a992d22fe0e92e988f49db1fec82c184a
  3. Affected versionversion=8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 <9b53d2c2a38a1effc341d99be3f99fa7ef17047d
  4. Affected versionversion=8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 <ef1b808e3b7c98612feceedf985c2fbbeb28f956
  5. Affected versionversion=8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 <f9f85df30118f3f4112761e6682fc60ebcce23e5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 <9245459a992d22fe0e92e988f49db1fec82c184a; version=8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 <9b53d2c2a38a1effc341d99be3f99fa7ef17047d; version=8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 <ef1b808e3b7c98612feceedf985c2fbbeb28f956; version=8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 <f9f85df30118f3f4112761e6682fc60ebcce23e5

Published CVSS scores

6.7Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.8NVDCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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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