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CVE Record

CVE-2026-46235: media: saa7164: add ioremap return checks and cleanups

In the Linux kernel, the following vulnerability has been resolved: media: saa7164: add ioremap return checks and cleanups Add checks for ioremap return values in saa7164_dev_setup(). If ioremap for BAR0 or BAR2 fails, release the already allocated PCI memory regions, remove the device from the global list, decrement the device count, and return -ENODEV. This prevents potential null pointer dereferences and ensures proper cleanup on memory mapping failures.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel driver reliability flaw in saa7164 media hardware support. If device memory mapping fails, the driver may dereference a null pointer instead of cleaning up. Business impact appears limited to systems using this driver and hardware, with likely crash or service disruption rather than data theft based on supplied sources.

Executive priority

Treat as a targeted kernel maintenance item, not an emergency, unless saa7164-dependent systems are business-critical. The absence of CVSS, KEV status, and exploit evidence lowers urgency, but kernel crashes can still affect availability.

Technical view

saa7164_dev_setup() did not check ioremap() returns for BAR0/BAR2. The fix adds failure handling, releases PCI memory regions, removes the device from the global list, decrements device count, and returns -ENODEV. The source bundle provides no CVSS, CWE, or exploitability detail.

Likely exposure

Exposure is most relevant to Linux systems with the saa7164 media driver and compatible PCI media hardware. The affected version data in the bundle is incomplete and partly duplicated, so verify against your distribution kernel package and the referenced stable commits.

Exploitation context

The supplied sources do not show active exploitation, and the CVE is not marked KEV. The described failure path depends on ioremap failure during device setup, suggesting a crash or denial-of-service style impact rather than confirmed privilege escalation.

Researcher notes

The record documents a defensive cleanup fix for unchecked ioremap() failures in a specific media driver. Key missing evidence includes CVSS, CWE, reachable attacker model, and distribution-specific affected ranges. Avoid assuming impact beyond null pointer dereference and cleanup failure.

Mitigation direction

  • Apply the relevant Linux stable or distribution kernel update containing the referenced fix.
  • Prioritize hosts that load the saa7164 driver or use matching media capture hardware.
  • If no vendor package is available, follow your distribution's kernel backport guidance.
  • Avoid direct kernel deployment from upstream commits without normal testing and change control.

Validation and detection

  • Inventory systems for the saa7164 module and related PCI media hardware.
  • Compare running kernel builds against vendor advisories and referenced stable commits.
  • Review kernel logs for saa7164 initialization failures or null pointer dereference traces.
  • Confirm updated kernels boot and media capture functions still work in staging.
Prepared
Confidence
medium
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2026-46235 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
7Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux443c1228d50518f3c550e1fef490a2c9d9246ce7, 443c1228d50518f3c550e1fef490a2c9d9246ce7, 443c1228d50518f3c550e1fef490a2c9d9246ce7, 443c1228d50518f3c550e1fef490a2c9d9246ce7, 443c1228d50518f3c550e1fef490a2c9d9246ce7, 443c1228d50518f3c550e1fef490a2c9d9246ce7unaffected
LinuxLinux2.6.32, 0, 6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9, 7.1affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.