High 7.8Published May 27, 2026

CVE-2026-45931accel/amdxdna: Hold mm structure across iommu_sva_unbind_device()

Updated under an hour ago (Oct 27, 2026, 12:10 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Hold mm structure across iommu_sva_unbind_device() Some tests trigger a crash in iommu_sva_unbind_device() due to accessing iommu_mm after the associated mm structure has been freed. Fix this by taking an explicit reference to the mm structure after successfully binding the device, and releasing it only after the device is unbound. This ensures the mm remains valid for the entire SVA bind/unbind lifetime.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Undergoing Analysis
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from be462c97b7dfd24999babe39cce3de224ebe1f80 before f6b4c1d98a7b8040d4d02e89425b3942016a2c2c; from be462c97b7dfd24999babe39cce3de224ebe1f80 before f31ccf6278132a35a652fe5eeac3941e1e912398; from be462c97b7dfd24999babe39cce3de224ebe1f80 before a9162439ad792afcddc04718408ec1380b7a5f63	CNA record
linux linux_kernel linux:linux_kernel	from 6.14 before 6.18.14; from 6.19 before 6.19.4	NVD

References

References

https://git.kernel.org/stable/c/f6b4c1d98a7b8040d4d02e89425b3942016a2c2c	patch
https://git.kernel.org/stable/c/f31ccf6278132a35a652fe5eeac3941e1e912398	patch
https://git.kernel.org/stable/c/a9162439ad792afcddc04718408ec1380b7a5f63	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.