Detections
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CVE-2026-46181
high
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() Sashiko points out the radix_tree itself is RCU safe, but nothing ever frees the mlx4_srq struct with RCU, and it isn't even accessed within the RCU critical section. It also will crash if an event is delivered before the srq object is finished initializing. Use the spinlock since it isn't easy to make RCU work, use refcount_inc_not_zero() to protect against partially initialized objects, and order the refcount_set() to be after the srq is fully initialized.
References
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46181.json
https://git.kernel.org/stable/c/c9341307ea16b9395c2e4c9c94d8499d91fe31d0
https://git.kernel.org/stable/c/8b7833f3bce35cb0d01c1503781523c099c675f0
https://git.kernel.org/stable/c/1e2a44875b6afb4add1115f7f3351dcbeb6f273d
https://bugzilla.redhat.com/show_bug.cgi?id=2482532
https://access.redhat.com/security/cve/CVE-2026-46181
https://access.redhat.com/errata/RHSA-2026:36216
https://access.redhat.com/errata/RHSA-2026:35896
https://access.redhat.com/errata/RHSA-2026:35894
https://access.redhat.com/errata/RHSA-2026:35863
https://access.redhat.com/errata/RHSA-2026:34443
https://access.redhat.com/errata/RHSA-2026:34095
https://access.redhat.com/errata/RHSA-2026:34094
https://access.redhat.com/errata/RHSA-2026:33900
https://access.redhat.com/errata/RHSA-2026:25217