Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 30353bfc43a1602c020f31d95cf27182ffd23824 before 2d8b30b496bc53e961ba7415fd629fc27813017c; affected 30353bfc43a1602c020f31d95cf27182ffd23824 before f0dbd9355ce1e93808541260c7ffab7956df9233; affected 30353bfc43a1602c020f31d95cf27182ffd23824 before 1e2a44875b6afb4add1115f7f3351dcbeb6f273d; affected 30353bfc43a1602c020f31d95cf27182ffd23824 before 8b7833f3bce35cb0d01c1503781523c099c675f0; affected 30353bfc43a1602c020f31d95cf27182ffd23824 before c9341307ea16b9395c2e4c9c94d8499d91fe31d0 |
| Linux / Linux | affected 4.9; unaffected 0 before 4.9; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.30 through 6.18.*; unaffected 7.0.7 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- 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
ADP enrichment
A flaw was found in the Linux kernel's RDMA/mlx4 component. This vulnerability arises from the incorrect use of Read-Copy Update (RCU) in the `mlx4_srq_event()` function. An attacker could potentially trigger an event before the `srq` object is fully initialized, leading to a system crash. This could result in a Denial of Service (DoS) for the affected system.
- 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
- https://access.redhat.com/errata/RHSA-2026:25121
- 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-2026:25120
- https://access.redhat.com/errata/RHSA-2026:33900
No English description supplied.
No references supplied.