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CVE-2026-90241— iommu/vt-d: Tear down scalable-mode context on probe 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，以下漏洞已得到修复： iommu/vt-d：在探测失败时拆除可扩展模式（scalable-mode）上下文 函数通过 遍历 PCI 设备的 DMA 别名，并为每个 RID（Requester ID，请求者标识）编程一个可扩展模式（scalable-mode）上下文条目。对于具有 的设备，该回调函数会为设备自身的 RID 以及每个别名位（alias bit）各调用一次，且每次调用都使用相同的 结构体，因此 会对多个 RID 分别执行。 在回调函数返回第一个错误时即停止遍历。因此，如果在遍历过程

AI Predicted 6.5 Difficulty: Hard

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 301f1a80487fd2f51012533792583d4425e8b8c0< 25ac85a9747cd63e1d166ace7b360a2cd9479d9d affected
301f1a80487fd2f51012533792583d4425e8b8c0< d0e978ced7429b516358bb4d41d337214768ae98 affected
301f1a80487fd2f51012533792583d4425e8b8c0< db5daf25f754cdc20c18525adb88240ece6fdee9 affected
301f1a80487fd2f51012533792583d4425e8b8c0< c509fb73a1093a15accd7d43a61645d4b520f6ac affected
6.9 affected
< 6.9 unaffected
6.12.110≤ 6.12.* unaffected
6.18.52≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-90241

Vulnerability Information
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Vulnerability Title
iommu/vt-d: Tear down scalable-mode context on probe failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Tear down scalable-mode context on probe failure intel_pasid_setup_sm_context() walks a PCI device’s DMA aliases via pci_for_each_dma_alias() and programs a scalable-mode context entry for each RID. For a device with a dma_alias_mask, the callback is invoked once for the device’s own RID and once for each alias bit, all with the same pci_dev, so device_pasid_table_setup() runs for multiple RIDs. pci_for_each_dma_alias() stops at the first callback error. Therefore, a failure partway through the walk can leave context entries for already processed RIDs present and still pointing to the device’s PASID table. On this error path, intel_iommu_probe_device() currently jumps directly to intel_pasid_free_table(), which frees the PASID table without first tearing down those context entries. The IOMMU may then walk a present context entry whose PASID table pointer references freed memory. intel_iommu_release_device() already performs teardown before freeing the table. Apply the same ordering on the probe failure path. device_pasid_table_teardown() safely handles RIDs that were never programmed: iommu_context_addr() returns NULL when no context table has been allocated, and clearing the Present bit of an already non-present entry is a no-op. So unwind is safe for both the alias that failed and any aliases not yet reached.
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 301f1a80487fd2f51012533792583d4425e8b8c0 ~ 25ac85a9747cd63e1d166ace7b360a2cd9479d9d -
Linux Linux 6.9 -

II. Public POCs for CVE-2026-90241

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III. Intelligence Information for CVE-2026-90241

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Patches & Fixes for CVE-2026-90241 (1)

Other References for CVE-2026-90241 (3)

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

CVE-2026-90257 Bluetooth: virtio_bt: avoid OOB read of build info string
CVE-2026-90238 media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
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-2026-90243 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-2026-90241

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