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CVE Record

CVE-2026-46075: crypto: atmel-sha204a - Fix potential UAF and memory leak in remove path

In the Linux kernel, the following vulnerability has been resolved: crypto: atmel-sha204a - Fix potential UAF and memory leak in remove path Unregister the hwrng to prevent new ->read() calls and flush the Atmel I2C workqueue before teardown to prevent a potential UAF if a queued callback runs while the device is being removed. Drop the early return to ensure sysfs entries are removed and ->hwrng.priv is freed, preventing a memory leak.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2026-46075 is a Linux kernel driver cleanup bug. Systems using the Atmel SHA204A hardware random-number driver could hit unsafe memory use or a leak when the device is removed. The available sources do not provide CVSS severity, public exploitation, or broad impact claims.

Executive priority

Treat as targeted kernel maintenance unless your fleet uses embedded or hardware-security platforms with Atmel SHA204A support. Prioritize confirmation and patch tracking, not emergency response, because severity and exploitation evidence are currently incomplete.

Technical view

The atmel-sha204a crypto driver remove path failed to fully prevent new hwrng read callbacks and queued I2C work before teardown. A queued callback during device removal could cause use-after-free. An early return could also leave sysfs entries and hwrng private data allocated.

Likely exposure

Exposure appears limited to Linux systems with the atmel-sha204a driver and relevant Atmel SHA204A I2C hardware or configuration. Generic Linux servers without this driver or hardware are less likely to be affected, but kernel build and module inventory should confirm.

Exploitation context

The source bundle marks KEV as false and cites no active exploitation. The described condition occurs during driver/device removal, involving hwrng reads and queued work during teardown. Evidence is insufficient to claim remote exploitation, privilege impact, or exploitation in the wild.

Researcher notes

Focus review on the atmel-sha204a remove path, hwrng unregister ordering, queued I2C work flushing, sysfs cleanup, and hwrng private data lifetime. The public record lacks CVSS, CWE, and exploitability analysis, so avoid over-scoring without local exposure evidence.

Mitigation direction

  • Apply vendor kernel updates that include the referenced stable atmel-sha204a fixes.
  • Track distribution advisories for affected kernel packages and backports.
  • Prioritize systems where atmel-sha204a is built, loaded, or attached to hardware.
  • If unused, assess disabling the driver through approved kernel configuration guidance.

Validation and detection

  • Inventory kernel versions and compare against vendor advisories or referenced stable commits.
  • Check whether the atmel-sha204a module is built or loaded on target systems.
  • Identify systems with Atmel SHA204A I2C hardware or board configurations.
  • Confirm patched kernels unregister hwrng and flush I2C work before teardown.
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-2026-46075 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
LinuxLinuxda001fb651b00e1deeaf24767dd691ae8152a4f5, da001fb651b00e1deeaf24767dd691ae8152a4f5, da001fb651b00e1deeaf24767dd691ae8152a4f5, da001fb651b00e1deeaf24767dd691ae8152a4f5, da001fb651b00e1deeaf24767dd691ae8152a4f5, da001fb651b00e1deeaf24767dd691ae8152a4f5unaffected
LinuxLinux5.3, 0, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4, 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.