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CVE Record

CVE-2026-23094: uacce: fix isolate sysfs check condition

In the Linux kernel, the following vulnerability has been resolved: uacce: fix isolate sysfs check condition uacce supports the device isolation feature. If the driver implements the isolate_err_threshold_read and isolate_err_threshold_write callback functions, uacce will create sysfs files now. Users can read and configure the isolation policy through sysfs. Currently, sysfs files are created as long as either isolate_err_threshold_read or isolate_err_threshold_write callback functions are present. However, accessing a non-existent callback function may cause the system to crash. Therefore, intercept the creation of sysfs if neither read nor write exists; create sysfs if either is supported, but intercept unsupported operations at the call site.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue can let an unsafe sysfs access path crash a system when uacce device isolation support is only partially implemented. The business impact is availability, not confirmed data theft or remote compromise, based on the supplied sources.

Executive priority

Treat as a targeted availability risk. Patch in normal kernel maintenance, faster for shared, multi-user, or accelerator-heavy systems where a crash would disrupt production workloads.

Technical view

In uacce, sysfs isolation files could be created when either read or write callback existed. The fix prevents unsupported operations from calling a missing callback. The source says accessing a non-existent callback may crash the system.

Likely exposure

Exposure appears limited to Linux systems using uacce device isolation sysfs support, likely accelerator-related deployments. The bundle does not prove general Linux exposure or specify exact affected distributions.

Exploitation context

The bundle provides no CVSS, CWE, KEV listing, or active exploitation evidence. It describes a crash condition from accessing unsupported sysfs operations; required privileges and practical exploitability are not specified.

Researcher notes

The public bundle is sparse. It supports a missing-callback crash in uacce sysfs isolation handling, but does not define privileges, attack surface beyond sysfs, CVSS, affected distro packages, or exploit status.

Mitigation direction

  • Apply vendor kernel updates that include the referenced stable fixes.
  • Check Linux distribution advisories for fixed package versions.
  • Prioritize systems using uacce-capable accelerator hardware or drivers.
  • If no update is available, follow vendor guidance for temporary controls.

Validation and detection

  • Inventory Linux kernel versions against distribution security advisories.
  • Identify systems using uacce or accelerator drivers with isolation sysfs support.
  • Confirm deployed kernels include one of the referenced stable fixes or vendor backports.
  • Review local access assumptions for users able to interact with relevant sysfs entries.
Prepared
Confidence
medium
Sources
6

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

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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
5Source 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
LinuxLinuxe3e289fbc0b520cf469469e8cdba84a50424eb65, e3e289fbc0b520cf469469e8cdba84a50424eb65, e3e289fbc0b520cf469469e8cdba84a50424eb65, e3e289fbc0b520cf469469e8cdba84a50424eb65unaffected
LinuxLinux6.3, 0, 6.6.122, 6.12.68, 6.18.8, 6.19affected
Weakness

CWE details

No CWE listed

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