CVE-2026-46181 | BDVDB-2026-336301 Detail
LinuxLinux
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.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: local.
Weaknesses#
- CWE-366 Race Condition within a Thread
References#
- https://git.kernel.org/stable/c/654aeddbc6e0f6e56531985bb12328ab4230c6c1
- https://git.kernel.org/stable/c/2d8b30b496bc53e961ba7415fd629fc27813017c
- https://git.kernel.org/stable/c/f0dbd9355ce1e93808541260c7ffab7956df9233
- https://git.kernel.org/stable/c/1e2a44875b6afb4add1115f7f3351dcbeb6f273d
- https://git.kernel.org/stable/c/8b7833f3bce35cb0d01c1503781523c099c675f0
- https://git.kernel.org/stable/c/c9341307ea16b9395c2e4c9c94d8499d91fe31d0
- https://access.redhat.com/security/cve/CVE-2026-46181
- https://bugzilla.redhat.com/show_bug.cgi?id=2482532
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46181.json
- https://access.redhat.com/errata/RHSA-2026:36216
- https://access.redhat.com/errata/RHSA-2026:41236
- https://access.redhat.com/errata/RHSA-2026:34095
- https://access.redhat.com/errata/RHSA-2026:34443
- https://access.redhat.com/errata/RHSA-2026:34094
- https://access.redhat.com/errata/RHSA-2026:25217
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.