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CVE-2026-90130— vdpa_sim: fix cleanup after worker creation failure

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： vdpa_sim：修复工作线程创建失败后的清理逻辑 当 调用失败时， 会将 设置为 。随后的错误处理路径会释放设备引用，从而析构一个仅部分初始化的模拟器对象。 由于 无条件地将 指针传递给 ，导致该 被解引用，可能触发通用保护异常（general protection fault）。 修复方案包括：记录 worker 初始化时的错误，清除指针，并仅在 worker 成功初始化后才对其进行清理。同时，在释放路径中增加对部分初始化对象的容忍性，通过保护 和 IOTLB 的清理逻

AI Predicted 5.5 Difficulty: Hard

Possible ATT&CK Techniques 1 AI

T1069 · Permission Groups Discovery

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 76acfa7bc54f1e3b9dde396e0a3534493419fd6f< feafa109f031ed111f7f968e447c13985db498e0 affected
76acfa7bc54f1e3b9dde396e0a3534493419fd6f< 05ddc94afb69e36df59e88cfa9e5c7bf9d10cfd0 affected
76acfa7bc54f1e3b9dde396e0a3534493419fd6f< 68b726b3a01fb02a68843781b17d05ef3d759987 affected
76acfa7bc54f1e3b9dde396e0a3534493419fd6f< ca6f3fa599cb764518df595368b743f856fdb516 affected
76acfa7bc54f1e3b9dde396e0a3534493419fd6f< bd670e5dfd2b01fd9692f61fa1456434c54026a4 affected
6.4 affected
< 6.4 unaffected
6.6.157≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-90130

Vulnerability Information
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Vulnerability Title
vdpa_sim: fix cleanup after worker creation failure
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 76acfa7bc54f1e3b9dde396e0a3534493419fd6f ~ feafa109f031ed111f7f968e447c13985db498e0 -
Linux Linux 6.4 -

II. Public POCs for CVE-2026-90130

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III. Intelligence Information for CVE-2026-90130

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Patches & Fixes for CVE-2026-90130 (5)

Same Patch Batch · Linux · 2026-09-17 · 602 CVEs total

CVE-2026-90257 Bluetooth: virtio_bt: avoid OOB read of build info string
CVE-2026-90240 iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90239 media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
CVE-2026-90241 iommu/vt-d: Tear down scalable-mode context on probe failure
CVE-2026-90243 iommu/vt-d: Clear Present bit before tearing down copied context entry
CVE-2026-90242 iommu/vt-d: Fix iopf_refcount leak on RID domain replacement
CVE-2026-90244 iommu/dma: Restore locking around msi_page_list
CVE-2026-90245 fbdev: kyro: Validate overlay viewport coordinates
CVE-2026-90246 apparmor: fix integer overflow in verify_tags() bounds check
CVE-2026-90247 bpf: Fix mmap_lock leak in irq_work path
CVE-2026-90248 net/sched: cls_api: fix teardown of an adopted proto on insert-race loss
CVE-2026-90249 iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes
CVE-2026-90250 bpf, cgroup: Fix storage null-ptr-deref after replacing prog
CVE-2026-90251 Bluetooth: MSFT: validate evt_prefix_len against the response length
CVE-2026-90253 Bluetooth: MGMT: free the mesh send cancel command when it is cancelled
CVE-2026-90252 Bluetooth: MGMT: free the HCI command when it is cancelled
CVE-2026-90254 Bluetooth: hci_sync: free the advertising instance on the failure and cancel paths
CVE-2026-90256 Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90255 Bluetooth: hci_conn: fix the SCO setup context lifetime
CVE-2026-90267 scsi: sd: Fix special_vec mempool leak when scsi_alloc_sgtables() fails

Showing top 20 of 602 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-90130

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