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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-46181

RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 30353bfc43a1602c020f31d95cf27182ffd23824 to < 654aeddbc6e0f6e56531985bb12328ab4230c6c1affected
  • 30353bfc43a1602c020f31d95cf27182ffd23824 to < 2d8b30b496bc53e961ba7415fd629fc27813017caffected
  • 30353bfc43a1602c020f31d95cf27182ffd23824 to < f0dbd9355ce1e93808541260c7ffab7956df9233affected
  • 30353bfc43a1602c020f31d95cf27182ffd23824 to < 1e2a44875b6afb4add1115f7f3351dcbeb6f273daffected
  • 30353bfc43a1602c020f31d95cf27182ffd23824 to < 8b7833f3bce35cb0d01c1503781523c099c675f0affected
  • 30353bfc43a1602c020f31d95cf27182ffd23824 to < c9341307ea16b9395c2e4c9c94d8499d91fe31d0affected

Linux Linux

Default version status: affected

  • 4.9affected
  • 0 to < 4.9unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.114 to ≤ 6.12.*unaffected
  • 6.18.30 to ≤ 6.18.*unaffected
  • 7.0.7 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References