CVE-2026-53281
published 2026-06-26CVE-2026-53281: In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption Commit 60f030f7418d…
PriorityP342high8.8CVSS 3.1
AVLACLPRLUINSCCHIHAH
EPSS
0.13%
2.6th percentile
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
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | >= 6.12.57 < 6.13 | 6.13 |
| linux | linux | >= 6.13.3 < 6.14 | 6.14 |
| linux | linux | >= 60f030f7418d3f1d94f2fb207fe3080e1844630b < 9022cb9ac0c2a72a57fa8ebf92ac74f953ca0153 | 9022cb9ac0c2a72a57fa8ebf92ac74f953ca0153 |
| linux | linux | >= 60f030f7418d3f1d94f2fb207fe3080e1844630b < cdfe3c9f2c9e28a8651ee463c88ad191ced2f840 | cdfe3c9f2c9e28a8651ee463c88ad191ced2f840 |
| linux | linux | >= 60f030f7418d3f1d94f2fb207fe3080e1844630b < 79ea2feb917b05366b49d85573c9c5331f043b2c | 79ea2feb917b05366b49d85573c9c5331f043b2c |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 6.12.57 < 6.13 | 6.13 |
| linux | linux_kernel | >= 6.13.3 < 6.18.33 | 6.18.33 |
| linux | linux_kernel | >= 6.19 < 7.0.10 | 7.0.10 |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
vendor_redhat8.8HIGH
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VulDB
Linux Kernel up to 6.18.32/7.0.9 https refcnt use after free
vuldb·2026-06-26
CVE-2026-53281 [CRITICAL] Linux Kernel up to 6.18.32/7.0.9 https refcnt use after free
A vulnerability labeled as critical has been found in Linux Kernel up to 6.18.32/7.0.9. This issue affects some unknown processing of the component https. Executing a manipulation of the argument refcnt can lead to use after free.
This vulnerability is handled as CVE-2026-53281. The attack can be executed remotely. There is not any exploit available.
The affected component should be upgraded.
GHSA
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_O
ghsa_unreviewed·2026-06-26
CVE-2026-53281 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_O
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
Red Hat
kernel: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption
vendor_redhat·2026-06-26·CVSS 8.8
CVE-2026-53281 [HIGH] kernel: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption
kernel: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption
No description is available for this CVE.
Package: kernel (Red Hat Enterprise Linux 10) - Affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linux 8) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 8) - Not affected
Package: kernel (Red Hat Enterprise Linux 9) - Affected
Package: kernel-rt (Red Hat Enterprise Linux 9) - Affected
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/79ea2feb917b05366b49d85573c9c5331f043b2chttps://git.kernel.org/stable/c/9022cb9ac0c2a72a57fa8ebf92ac74f953ca0153https://git.kernel.org/stable/c/cdfe3c9f2c9e28a8651ee463c88ad191ced2f840https://access.redhat.com/security/cve/CVE-2026-53281https://bugzilla.redhat.com/show_bug.cgi?id=2493728https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53281.json
2026-06-26
Published