CVE-2026-90130 (GCVE-0-2026-90130)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:06 – Updated: 2026-09-17 16:06
VLAI
Title
vdpa_sim: fix cleanup after worker creation failure
Summary
In the Linux kernel, the following vulnerability has been resolved: vdpa_sim: fix cleanup after worker creation failure vdpasim_create() leaves vdpasim->worker as an ERR_PTR when kthread_run_worker() fails. The error path then drops the device reference, which releases the partially initialized simulator. vdpasim_free() unconditionally passes the worker pointer to kthread_destroy_worker(), so the ERR_PTR is dereferenced and can trigger a general protection fault. Store the worker error, clear the pointer, and only clean up the worker when it was successfully initialized. Also make the release path tolerate partially initialized objects by guarding virtqueue and IOTLB cleanup, since the same release path can be reached from other initialization failures. I found this bug myself, though the patch was written with AI assistance.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 76acfa7bc54f1e3b9dde396e0a3534493419fd6f , < feafa109f031ed111f7f968e447c13985db498e0 (git)
Affected: 76acfa7bc54f1e3b9dde396e0a3534493419fd6f , < 05ddc94afb69e36df59e88cfa9e5c7bf9d10cfd0 (git)
Affected: 76acfa7bc54f1e3b9dde396e0a3534493419fd6f , < 68b726b3a01fb02a68843781b17d05ef3d759987 (git)
Affected: 76acfa7bc54f1e3b9dde396e0a3534493419fd6f , < ca6f3fa599cb764518df595368b743f856fdb516 (git)
Affected: 76acfa7bc54f1e3b9dde396e0a3534493419fd6f , < bd670e5dfd2b01fd9692f61fa1456434c54026a4 (git)
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Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.