CVE-2026-46235

Local system crash via unchecked ioremap failure

Published May 28, 2026 · Updated May 28, 2026

Null pointer dereference in the Linux kernel saa7164 driver allows local users to crash the system during failed PCI BAR mapping. The saa7164_dev_setup() path uses BAR0 or BAR2 mappings without checking whether ioremap returned NULL, then dereferences the failed mapping instead of unwinding device state. Reachability requires the saa7164 PCI media driver and a memory-mapping failure during device setup; the bounded consequence is a kernel crash and service interruption.

CVSS severity5.5
Medium
EPSS probability0.12%
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 kernel saa7164 driver allows local users to crash the system during failed PCI BAR mapping. The saa7164_dev_setup() path uses BAR0 or BAR2 mappings without checking whether ioremap returned NULL, then dereferences the failed mapping instead of unwinding device state. Reachability requires the saa7164 PCI media driver and a memory-mapping failure during device setup; the bounded consequence is a kernel crash and service interruption.

The record

CVE
CVE-2026-46235
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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=2.6.32
  2. Affected versionversion=443c1228d50518f3c550e1fef490a2c9d9246ce7 <3ce8f3057c51bb0a66aa3fab0862be74e9f88684
  3. Affected versionversion=443c1228d50518f3c550e1fef490a2c9d9246ce7 <6047dc542fa404b5c187cc2c7906aaaaec6d11ed
  4. Affected versionversion=443c1228d50518f3c550e1fef490a2c9d9246ce7 <6c22a6d8e4c1507bba504aeebe80476144a373eb
  5. Affected versionversion=443c1228d50518f3c550e1fef490a2c9d9246ce7 <a9b83f46e52cf1239d780920d1a7a3e415f7b5d9
  6. Affected versionversion=443c1228d50518f3c550e1fef490a2c9d9246ce7 <d51c60a498e83c9a79884c8e420f97e3885c9583

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2.6.32; version=443c1228d50518f3c550e1fef490a2c9d9246ce7 <3ce8f3057c51bb0a66aa3fab0862be74e9f88684; version=443c1228d50518f3c550e1fef490a2c9d9246ce7 <6047dc542fa404b5c187cc2c7906aaaaec6d11ed; version=443c1228d50518f3c550e1fef490a2c9d9246ce7 <6c22a6d8e4c1507bba504aeebe80476144a373eb; version=443c1228d50518f3c550e1fef490a2c9d9246ce7 <a9b83f46e52cf1239d780920d1a7a3e415f7b5d9; version=443c1228d50518f3c550e1fef490a2c9d9246ce7 <d51c60a498e83c9a79884c8e420f97e3885c9583

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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