CVE-2026-53281 (GCVE-0-2026-53281)
Vulnerability from cvelistv5
Published
2026-06-26 19:40
Modified
2026-08-05 12:34
Severity ?
8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption Commit 60f030f7418d ("iommu/vt-d: Avoid use of NULL after WARN_ON_ONCE") fixed a NULL pointer dereference in an unlikely situation partly. If dev_pasid is not found in the dev_pasids list, it remains NULL. However, the teardown operations are executed unconditionally, this lead to a NULL pointer dereference or refcount corruption. If the domain was never attached to this IOMMU, info will be NULL, which would cause an immediate dereference when checking --info->refcnt. Even if info is not NULL, decrementing the refcount without having removed a valid PASID might unbalance the count. This could lead to premature dropping of the refcount to 0, potentially causing a use-after-free for the remaining active devices sharing the domain. Fix it by returning early if dev_pasid is NULL, before executing the teardown operations. Issue found by AI review and suggested by Kevin Tian. https://sashiko.dev/#/patchset/20260421031347.1408890-1-zhenzhong.duan%40intel.com
References
Impacted products
Vendor Product Version
Linux Linux Version: 60f030f7418d3f1d94f2fb207fe3080e1844630b
Version: 60f030f7418d3f1d94f2fb207fe3080e1844630b
Version: 60f030f7418d3f1d94f2fb207fe3080e1844630b
Version: 68ec78beb4a3fb0877cbaaf49758c85410c05977
Version: df96876be3b064aefc493f760e0639765d13ed0d
Version: 6.12.57   ≤
Version: 6.13.3   ≤
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