CVE-2024-56745

Memory exhaustion via lost PCI reset buffer

Published Dec 29, 2024 · Updated May 11, 2026

Memory leak in the PCI sysfs reset interface allows local users to exhaust kernel memory through repeated reset_method writes. reset_method_store() passes its only allocation pointer to strsep(), which sets it to NULL after the last token, so kfree() cannot release the kstrndup() buffer. Local write access to a PCI device's reset_method attribute is required; repeated requests can deplete kernel memory and interrupt service.

CVSS severity3.3
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the PCI sysfs reset interface allows local users to exhaust kernel memory through repeated reset_method writes. reset_method_store() passes its only allocation pointer to strsep(), which sets it to NULL after the last token, so kfree() cannot release the kstrndup() buffer. Local write access to a PCI device's reset_method attribute is required; repeated requests can deplete kernel memory and interrupt service.

The record

CVE
CVE-2024-56745
Published
Dec 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 29, 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=5.15
  2. Affected versionversion=d88f521da3efd698e36d0d504a2abba6ac4f5ef8 <2985b1844f3f3447f2d938eff1ef6762592065a5
  3. Affected versionversion=d88f521da3efd698e36d0d504a2abba6ac4f5ef8 <403efb4457c0c8f8f51e904cc57d39193780c6bd
  4. Affected versionversion=d88f521da3efd698e36d0d504a2abba6ac4f5ef8 <543d0eb40e45c6a51f1bff02f417b602e54472d5
  5. Affected versionversion=d88f521da3efd698e36d0d504a2abba6ac4f5ef8 <8e098baf6bc3f3a6aefc383509aba07e202f7ee0
  6. Affected versionversion=d88f521da3efd698e36d0d504a2abba6ac4f5ef8 <931d07ccffcc3614f20aaf602b31e89754e21c59
  7. Affected versionversion=d88f521da3efd698e36d0d504a2abba6ac4f5ef8 <fe6fae61f3b993160aef5fe2b7141a83872c144f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=d88f521da3efd698e36d0d504a2abba6ac4f5ef8 <2985b1844f3f3447f2d938eff1ef6762592065a5; version=d88f521da3efd698e36d0d504a2abba6ac4f5ef8 <403efb4457c0c8f8f51e904cc57d39193780c6bd; version=d88f521da3efd698e36d0d504a2abba6ac4f5ef8 <543d0eb40e45c6a51f1bff02f417b602e54472d5; version=d88f521da3efd698e36d0d504a2abba6ac4f5ef8 <8e098baf6bc3f3a6aefc383509aba07e202f7ee0; version=d88f521da3efd698e36d0d504a2abba6ac4f5ef8 <931d07ccffcc3614f20aaf602b31e89754e21c59; version=d88f521da3efd698e36d0d504a2abba6ac4f5ef8 <fe6fae61f3b993160aef5fe2b7141a83872c144f

Published CVSS scores

3.3CISA ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
6.1OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/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-401Missing Release of Memory after Effective Lifetime
T1499.001OS Exhaustion Flood

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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