CVE-2026-68226

Kernel crash via unchecked BAR0 mapping

Published Aug 10, 2026 · Updated Aug 10, 2026

NULL pointer dereference in the Linux cx23885 PCI driver allows local users to crash the kernel when BAR0 mapping fails. cx23885_dev_setup() uses the unchecked result of pci_ioremap_bar() as the BAR0 register mapping instead of aborting and releasing the reserved PCI region. Reachability requires a cx23885-family PCI device and a BAR0 mapping failure during device setup; the resulting fault interrupts the host.

CVSS severity5.5
Medium
EPSS probability0.22%
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 the Linux cx23885 PCI driver allows local users to crash the kernel when BAR0 mapping fails. cx23885_dev_setup() uses the unchecked result of pci_ioremap_bar() as the BAR0 register mapping instead of aborting and releasing the reserved PCI region. Reachability requires a cx23885-family PCI device and a BAR0 mapping failure during device setup; the resulting fault interrupts the host.

The record

CVE
CVE-2026-68226
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=2.6.24
  2. Affected versionversion=d19770e5178a4bc49641711246360c25781d20a4 <83540d86d717735b52a43e4ba1b784da5cc2310a
  3. Affected versionversion=d19770e5178a4bc49641711246360c25781d20a4 <8fbdca4c99f68734e9b6c030973fb61a11bede15
  4. Affected versionversion=d19770e5178a4bc49641711246360c25781d20a4 <a0701e387b46e2481c05b47f1235b954bfc2af3e
  5. Affected versionversion=d19770e5178a4bc49641711246360c25781d20a4 <c68c4ce72feb6fcccc843eb3baa7af60189ed567
  6. Affected versionversion=d19770e5178a4bc49641711246360c25781d20a4 <ff3c670a1de3a714f5644e37b9446fe7c3299fd3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.24; version=d19770e5178a4bc49641711246360c25781d20a4 <83540d86d717735b52a43e4ba1b784da5cc2310a; version=d19770e5178a4bc49641711246360c25781d20a4 <8fbdca4c99f68734e9b6c030973fb61a11bede15; version=d19770e5178a4bc49641711246360c25781d20a4 <a0701e387b46e2481c05b47f1235b954bfc2af3e; version=d19770e5178a4bc49641711246360c25781d20a4 <c68c4ce72feb6fcccc843eb3baa7af60189ed567; version=d19770e5178a4bc49641711246360c25781d20a4 <ff3c670a1de3a714f5644e37b9446fe7c3299fd3

Published CVSS scores

2.5Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
5.5Oracle LinuxCVSS: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.

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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

T1499Endpoint Denial of Service

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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