CVE-2024-38577

Kernel memory corruption via unbounded counter formatting

Published Jun 19, 2024 · Updated Aug 5, 2026

Buffer overflow in Linux from 5.8 allows local users to corrupt kernel memory through RCU task-tracing status output. show_rcu_tasks_trace_gp_kthread() formats four potentially huge unsigned counters with sprintf() into a fixed 64-byte stack buffer without enforcing its capacity. Exploitation requires low-privileged local access, high complexity, and counter values that upstream describes as unrealistically high; an overrun can compromise kernel confidentiality, integrity, and availability.

CVSS severity7.0
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Linux from 5.8 allows local users to corrupt kernel memory through RCU task-tracing status output. show_rcu_tasks_trace_gp_kthread() formats four potentially huge unsigned counters with sprintf() into a fixed 64-byte stack buffer without enforcing its capacity. Exploitation requires low-privileged local access, high complexity, and counter values that upstream describes as unrealistically high; an overrun can compromise kernel confidentiality, integrity, and availability.

The record

CVE
CVE-2024-38577
Published
Jun 19, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-120, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 19, 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=5.8
  2. Affected versionversion=edf3775f0ad66879796f594983163f672c4bf1a2 <08186d0c5fb64a1cc4b43e009314ee6b173ed222
  3. Affected versionversion=edf3775f0ad66879796f594983163f672c4bf1a2 <17c43211d45f13d1badea3942b76bf16bcc49281
  4. Affected versionversion=edf3775f0ad66879796f594983163f672c4bf1a2 <1a240e138071b25944ded0f5b3e357aa99fabcb7
  5. Affected versionversion=edf3775f0ad66879796f594983163f672c4bf1a2 <32d988f48ed287e676a29a15ac30701c35849aec
  6. Affected versionversion=edf3775f0ad66879796f594983163f672c4bf1a2 <6593d857ce5b5b802fb73d8091ac9c84b92c1697
  7. Affected versionversion=edf3775f0ad66879796f594983163f672c4bf1a2 <af7b560c88fb420099e29890aa682b8a3efc8784
  8. Affected versionversion=edf3775f0ad66879796f594983163f672c4bf1a2 <cc5645fddb0ce28492b15520306d092730dffa48

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=edf3775f0ad66879796f594983163f672c4bf1a2 <08186d0c5fb64a1cc4b43e009314ee6b173ed222; version=edf3775f0ad66879796f594983163f672c4bf1a2 <17c43211d45f13d1badea3942b76bf16bcc49281; version=edf3775f0ad66879796f594983163f672c4bf1a2 <1a240e138071b25944ded0f5b3e357aa99fabcb7; version=edf3775f0ad66879796f594983163f672c4bf1a2 <32d988f48ed287e676a29a15ac30701c35849aec; version=edf3775f0ad66879796f594983163f672c4bf1a2 <6593d857ce5b5b802fb73d8091ac9c84b92c1697; version=edf3775f0ad66879796f594983163f672c4bf1a2 <af7b560c88fb420099e29890aa682b8a3efc8784; version=edf3775f0ad66879796f594983163f672c4bf1a2 <cc5645fddb0ce28492b15520306d092730dffa48

Published CVSS scores

5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.0LinuxCVSS:3.1/AV:L/AC:H/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

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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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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