CVE-2024-45020

Kernel crash via stacksafe out-of-bounds access

Published Sep 11, 2024 · Updated Aug 5, 2026

Out-of-bounds access in Linux kernel 6.6.15 through 6.6.47 and 6.7 through 6.10.6 allows local users to crash the kernel. The BPF verifier's stacksafe() loop indexes cur->stack using old->allocated_stack without first ensuring that the current stack is equally large. A low-privileged local user must reach the BPF verifier with stack states having mismatched allocations; the demonstrated consequence is a kernel crash.

CVSS severity5.5
Medium
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

Out-of-bounds access in Linux kernel 6.6.15 through 6.6.47 and 6.7 through 6.10.6 allows local users to crash the kernel. The BPF verifier's stacksafe() loop indexes cur->stack using old->allocated_stack without first ensuring that the current stack is equally large. A low-privileged local user must reach the BPF verifier with stack states having mismatched allocations; the demonstrated consequence is a kernel crash.

The record

CVE
CVE-2024-45020
Published
Sep 11, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 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=2793a8b015f7f1caadb9bce9c63dc659f7522676 <6e3987ac310c74bb4dd6a2fa8e46702fe505fb2b
  2. Affected versionversion=2793a8b015f7f1caadb9bce9c63dc659f7522676 <bed2eb964c70b780fb55925892a74f26cb590b25
  3. Affected versionversion=6.6.15 <6.6.48
  4. Affected versionversion=6.7
  5. Affected versionversion=ab470fefce2837e66b771c60858118d50bb5bb10 <7cad3174cc79519bf5f6c4441780264416822c08

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2793a8b015f7f1caadb9bce9c63dc659f7522676 <6e3987ac310c74bb4dd6a2fa8e46702fe505fb2b; version=2793a8b015f7f1caadb9bce9c63dc659f7522676 <bed2eb964c70b780fb55925892a74f26cb590b25; version=6.6.15 <6.6.48; version=6.7; version=ab470fefce2837e66b771c60858118d50bb5bb10 <7cad3174cc79519bf5f6c4441780264416822c08

Published CVSS scores

5.5National Vulnerability DatabaseCVSS: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.

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
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

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Your stack

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