CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
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
Засегнати продукти
- Linux Linux: 68ec78beb4a3fb0877cbaaf49758c85410c05977 преди d1a677f9c5e02c4ae49614044ac21296660d1391; 60f030f7418d3f1d94f2fb207fe3080e1844630b преди 9022cb9ac0c2a72a57fa8ebf92ac74f953ca0153; 60f030f7418d3f1d94f2fb207fe3080e1844630b преди cdfe3c9f2c9e28a8651ee463c88ad191ced2f840; 60f030f7418d3f1d94f2fb207fe3080e1844630b преди 79ea2feb917b05366b49d85573c9c5331f043b2c; df96876be3b064aefc493f760e0639765d13ed0d; 6.12.57 преди 6.12.114; 6.13.3 преди 6.14
- Linux Linux: 6.14; преди 6.14; 6.12.114 до 6.12.*; 6.18.33 до 6.18.*; 7.0.10 до 7.0.*; от 7.1 нататък
Red Hat: още 5 продукта, добавени от Red Hat
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8
Вид слабост
История
- 26 юни 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-53281
- https://nvd.nist.gov/vuln/detail/CVE-2026-53281
- https://git.kernel.org/stable/c/d1a677f9c5e02c4ae49614044ac21296660d1391
- https://git.kernel.org/stable/c/9022cb9ac0c2a72a57fa8ebf92ac74f953ca0153
- https://git.kernel.org/stable/c/cdfe3c9f2c9e28a8651ee463c88ad191ced2f840
- https://git.kernel.org/stable/c/79ea2feb917b05366b49d85573c9c5331f043b2c
- https://access.redhat.com/security/cve/CVE-2026-53281
- https://bugzilla.redhat.com/show_bug.cgi?id=2493728
- 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