CVE-2024-43876

Excessive kernel logging via stale PCIe link state

Published Aug 21, 2024 · Updated May 11, 2026

Improper PCIe link-state handling in Linux allows attackers to trigger a kernel warning backtrace during system suspend. In rcar_pcie_wakeup(), the R-Car host driver requests L1 after an ASMedia ASM1062 has already returned the link to L0, causing an L1FAEG poll timeout and WARN() backtrace. Reachability requires the R-Car PCIe controller, the non-ASPM ASM1062 device, and a suspend timing sequence; the link can remain operational despite the warning.

CVSS severityUnavailable
Unscored
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

Improper PCIe link-state handling in Linux allows attackers to trigger a kernel warning backtrace during system suspend. In rcar_pcie_wakeup(), the R-Car host driver requests L1 after an ASMedia ASM1062 has already returned the link to L0, causing an L1FAEG poll timeout and WARN() backtrace. Reachability requires the R-Car PCIe controller, the non-ASPM ASM1062 device, and a suspend timing sequence; the link can remain operational despite the warning.

The record

CVE
CVE-2024-43876
Published
Aug 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 21, 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=5.18
  2. Affected versionversion=84b576146294c2be702cfcd174eaa74167e276f9 <2ae4769332dfdb97f4b6f5dc9ac8f46d02aaa3df
  3. Affected versionversion=84b576146294c2be702cfcd174eaa74167e276f9 <3ff3bdde950f1840df4030726cef156758a244d7
  4. Affected versionversion=84b576146294c2be702cfcd174eaa74167e276f9 <526a877c6273d4cd0d0aede84c1d620479764b1c
  5. Affected versionversion=84b576146294c2be702cfcd174eaa74167e276f9 <c93637e6a4c4e1d0e85ef7efac78d066bbb24d96
  6. Affected versionversion=9e14fb714ebf55443dd3449de9ea2ffcf13e562a <59c78e8fddc1fe68f14011450a09b3418127d2ad

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=84b576146294c2be702cfcd174eaa74167e276f9 <2ae4769332dfdb97f4b6f5dc9ac8f46d02aaa3df; version=84b576146294c2be702cfcd174eaa74167e276f9 <3ff3bdde950f1840df4030726cef156758a244d7; version=84b576146294c2be702cfcd174eaa74167e276f9 <526a877c6273d4cd0d0aede84c1d620479764b1c; version=84b576146294c2be702cfcd174eaa74167e276f9 <c93637e6a4c4e1d0e85ef7efac78d066bbb24d96; version=9e14fb714ebf55443dd3449de9ea2ffcf13e562a <59c78e8fddc1fe68f14011450a09b3418127d2ad

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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