PatchSiren cyber security CVE debrief
CVE-2026-46205 Linux CVE debrief
A vulnerability in the Linux kernel's staging media atomisp driver has been resolved by disabling all private IOCTL handlers. The fix prevents potential security issues arising from unsafe IOCTL implementations by returning early when any non-zero command is received, rather than removing the code entirely to maintain static analysis compatibility.
- Vendor
- Linux
- Product
- Unknown
- CVSS
- HIGH 7.8
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-05-28
- Original CVE updated
- 2026-06-15
- Advisory published
- 2026-05-28
- Advisory updated
- 2026-06-15
Who should care
Linux system administrators maintaining systems with Intel Atom ISP hardware; security teams tracking kernel staging driver exposure; distribution maintainers packaging kernel updates
Technical summary
The atomisp driver in the Linux kernel staging tree contained private IOCTL handlers that were determined to be insufficiently safe. Rather than removing the code entirely (which would trigger static checker warnings), the fix adds an early return when cmd is non-zero, effectively disabling all private IOCTLs. This is a defensive hardening measure in a staging driver, which by definition is not considered production-ready. The vulnerability affects local attack surface only and requires the atomisp driver to be loaded.
Defensive priority
medium
Recommended defensive actions
- Review Linux kernel configurations to ensure atomisp driver is not enabled in production systems if unnecessary
- Monitor NVD for CVSS score assignment once analysis completes
- Apply kernel updates containing the referenced stable tree commits when available for your distribution
- Consider disabling staging drivers in security-sensitive environments as a general hardening practice
Evidence notes
The vulnerability description indicates private IOCTLs in the atomisp staging driver were not as safe as assumed. The resolution disables these IOCTLs by returning early in the handler function when cmd is non-zero. Five kernel stable tree commits are referenced as fixes. No CVSS score or severity has been assigned by NVD (status: Awaiting Analysis). The vendor identification is marked low confidence and needs review, derived from 'Kernel' reference domain candidate.
Sources and references
Verified primary and authoritative sources
-
CVE-2026-46205 CVE Program record
Publisher, destination, and source semantics verified
URL: https://www.cve.org/CVERecord?id=CVE-2026-46205
CVE Program - Official CVE Program record with source-provided CVE metadata.
-
CVE-2026-46205 NVD vulnerability detail
Publisher, destination, and source semantics verified
URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46205
NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.
Supplemental references
-
Source reference
Unverified legacy reference
URL: https://git.kernel.org/stable/c/2b7eb2c5dc72f0fc954ac4aa155f9e285e937f7c
416baaa9-dc9f-4396-8d5f-8c081fb06d67
-
Source reference
Unverified legacy reference
URL: https://git.kernel.org/stable/c/6850a439f8d23d4979624f1d6880d3118d473a28
416baaa9-dc9f-4396-8d5f-8c081fb06d67
-
Source reference
Unverified legacy reference
URL: https://git.kernel.org/stable/c/6f1ce75a75c65061e7a720c3d0ee5f8adab7a2d3
416baaa9-dc9f-4396-8d5f-8c081fb06d67
-
Source reference
Unverified legacy reference
URL: https://git.kernel.org/stable/c/8c7a281a99224a5b9af99c4dcd98d68eea75926c
416baaa9-dc9f-4396-8d5f-8c081fb06d67
-
Source reference
Unverified legacy reference
URL: https://git.kernel.org/stable/c/c7848b67ef10f581114b6a2f52b160fc20eb52c9
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Methodology and review provenance
AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.