iommu/vt-d: Avoid NULL pointer dereference or refcount corruption
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
CVE-2026-53281
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-53281
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "68ec78beb4a3fb0877cbaaf49758c85410c05977",
"lessThan": "d1a677f9c5e02c4ae49614044ac21296660d1391",
"versionType": "git"
},
{
"status": "affected",
"version": "60f030f7418d3f1d94f2fb207fe3080e1844630b",
"lessThan": "9022cb9ac0c2a72a57fa8ebf92ac74f953ca0153",
"versionType": "git"
},
{
"status": "affected",
"version": "60f030f7418d3f1d94f2fb207fe3080e1844630b",
"lessThan": "cdfe3c9f2c9e28a8651ee463c88ad191ced2f840",
"versionType": "git"
},
{
"status": "affected",
"version": "60f030f7418d3f1d94f2fb207fe3080e1844630b",
"lessThan": "79ea2feb917b05366b49d85573c9c5331f043b2c",
"versionType": "git"
},
{
"status": "affected",
"version": "df96876be3b064aefc493f760e0639765d13ed0d",
"versionType": "git"
},
{
"status": "affected",
"version": "6.12.57",
"lessThan": "6.12.114",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.13.3",
"lessThan": "6.14",
"versionType": "semver"
}
],
"programFiles": [
"drivers/iommu/intel/iommu.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.33",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.10",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/iommu/intel/iommu.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53281
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46385 · Revision 1
- Added to Heist Feed
- Publisher date