CVE-2026-80917

Kernel crash via missing CAM bus callbacks

Published Sep 9, 2026 · Updated Sep 9, 2026

NULL pointer dereference in Linux PCI host-generic affected versions crashes 32-bit CAM hosts during PCI bus enumeration. On a 32-bit host using pci-host-cam-generic, the CAM operations omit add_bus and remove_bus callbacks, leaving cfg->winp[] unpopulated before pci_ecam_map_bus uses it as the base for configuration access. The first configuration read dereferences the NULL base and crashes the kernel during enumeration; no remote or local user-triggered path is documented.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux PCI host-generic affected versions crashes 32-bit CAM hosts during PCI bus enumeration. On a 32-bit host using pci-host-cam-generic, the CAM operations omit add_bus and remove_bus callbacks, leaving cfg->winp[] unpopulated before pci_ecam_map_bus uses it as the base for configuration access. The first configuration read dereferences the NULL base and crashes the kernel during enumeration; no remote or local user-triggered path is documented.

The record

CVE
CVE-2026-80917
Published
Sep 9, 2026
Updated
Sep 9, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 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=0b5877a1aeacdbf32b3bea91326592004ec7806f
  2. Affected versionversion=5.12.19 <5.13
  3. Affected versionversion=5.13.4 <5.14
  4. Affected versionversion=5.14
  5. Affected versionversion=8fe55ef23387ce3c7488375b1fd539420d7654bb <008cb88edb41f3c7c8e0ed763ff9f26719830984
  6. Affected versionversion=8fe55ef23387ce3c7488375b1fd539420d7654bb <0916948026f623844acd08888f7cbedbf1c48d6b
  7. Affected versionversion=8fe55ef23387ce3c7488375b1fd539420d7654bb <0c55707bd5d0d7670704cfd0dda933809b052f67
  8. Affected versionversion=8fe55ef23387ce3c7488375b1fd539420d7654bb <5e52eb0290f66ba0732956dcb1e365b5ca3c5108
  9. Affected versionversion=8fe55ef23387ce3c7488375b1fd539420d7654bb <74456843f18ba7f3045974d7e8b88ab993152b8c
  10. Affected versionversion=8fe55ef23387ce3c7488375b1fd539420d7654bb <8d08713ec83a18526d1ed1fd5f0d2b901d103a10
  11. Affected versionversion=8fe55ef23387ce3c7488375b1fd539420d7654bb <a199293f3038db8d31d47aa60f1e18272cd82354
  12. Affected versionversion=8fe55ef23387ce3c7488375b1fd539420d7654bb <baf9b0383ff770fdff123d3a832f3a99641d96dd
  13. Affected versionversion=a037ebbe72a4f98495b193112e2b2000e5e09eb5

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=0b5877a1aeacdbf32b3bea91326592004ec7806f; version=5.12.19 <5.13; version=5.13.4 <5.14; version=5.14; version=8fe55ef23387ce3c7488375b1fd539420d7654bb <008cb88edb41f3c7c8e0ed763ff9f26719830984; version=8fe55ef23387ce3c7488375b1fd539420d7654bb <0916948026f623844acd08888f7cbedbf1c48d6b; version=8fe55ef23387ce3c7488375b1fd539420d7654bb <0c55707bd5d0d7670704cfd0dda933809b052f67; version=8fe55ef23387ce3c7488375b1fd539420d7654bb <5e52eb0290f66ba0732956dcb1e365b5ca3c5108; version=8fe55ef23387ce3c7488375b1fd539420d7654bb <74456843f18ba7f3045974d7e8b88ab993152b8c; version=8fe55ef23387ce3c7488375b1fd539420d7654bb <8d08713ec83a18526d1ed1fd5f0d2b901d103a10; version=8fe55ef23387ce3c7488375b1fd539420d7654bb <a199293f3038db8d31d47aa60f1e18272cd82354; version=8fe55ef23387ce3c7488375b1fd539420d7654bb <baf9b0383ff770fdff123d3a832f3a99641d96dd; version=a037ebbe72a4f98495b193112e2b2000e5e09eb5

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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.

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Technologies

Your stack

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Your stack

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