CVE-2026-53281
- Source
- https://cve.org/CVERecord?id=CVE-2026-53281
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53281.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-53281
- Downstream
BELL (1)
DEBIAN (1)
openSUSE (1)
RHSA (2)
RLSA (2)
SUSE (10)
- Related
- Published
- 2026-06-26T19:40:43Z
- Modified
- 2026-10-08T02:51:25Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- iommu/vt-d: Avoid NULL pointer dereference or refcount corruption
- Details
-
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
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53281.json" }- References
-
- https://git.kernel.org/stable/c/79ea2feb917b05366b49d85573c9c5331f043b2c
- https://git.kernel.org/stable/c/9022cb9ac0c2a72a57fa8ebf92ac74f953ca0153
- https://git.kernel.org/stable/c/cdfe3c9f2c9e28a8651ee463c88ad191ced2f840
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53281.json
- https://access.redhat.com/errata/RHSA-2026:47017
- https://access.redhat.com/errata/RHSA-2026:47040
- https://access.redhat.com/security/cve/CVE-2026-53281
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53281.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-53281
- https://bugzilla.redhat.com/show_bug.cgi?id=2493728
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced60f030f7418d3f1d94f2fb207fe3080e1844630bFixed9022cb9ac0c2a72a57fa8ebf92ac74f953ca0153Fixedcdfe3c9f2c9e28a8651ee463c88ad191ced2f840Fixed79ea2feb917b05366b49d85573c9c5331f043b2c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.12.57Fixed6.13
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.13.3Fixed6.14
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced68ec78beb4a3fb0877cbaaf49758c85410c05977
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceddf96876be3b064aefc493f760e0639765d13ed0d