CVE-2026-74395None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix devx subscribe-event unwind NULL dereference MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT() links event_sub into sub_list before initializing the fields used by …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
RDMA/mlx5: Fix devx subscribe-event unwind NULL dereference
MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT() links event_sub into sub_list before initializing the fields used by the shared error path.
If eventfd_ctx_fdget() then fails, the unwind path dereferences event_sub->ev_file in uverbs_uobject_put() and calls subscribe_event_xa_dealloc() with an unset xa_key_level1.
subscribe_event_xa_alloc() creates the XA entry exactly once for a given key_level1, on the first occurrence of that key. The unwind path must therefore call subscribe_event_xa_dealloc() exactly once for it as well.
Enforce that by adding devx_key_in_sub_list() and calling subscribe_event_xa_dealloc() only when the last matching pending entry is being cleaned up.
Linux >= 7597385371425febdaa8c6a1da3625d4ffff16f5 < 6e15b770461eeaa0ff73934922cb670a6a9db04eLinux >= 7597385371425febdaa8c6a1da3625d4ffff16f5 < 9be9aca28424228586fe9211c373ebdb826ebb6cLinux >= 7597385371425febdaa8c6a1da3625d4ffff16f5 < f345e744b6b087188cde2377da5cbe9713b61353Linux >= 7597385371425febdaa8c6a1da3625d4ffff16f5 < 1025dc2f7ba29b04b8687790fa91f9cd1a53141eLinux >= 7597385371425febdaa8c6a1da3625d4ffff16f5 < 7921821fc2b19c01588311f6e7468ae5b68b1f61Linux >= 7597385371425febdaa8c6a1da3625d4ffff16f5 < 5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989Linux >= 7597385371425febdaa8c6a1da3625d4ffff16f5 < 78b9589fda266c71f0f9d0c858d4fa7381a890a5Linux >= 7597385371425febdaa8c6a1da3625d4ffff16f5 < 43f8f7946814c8e5f464518246fdbc69b6e32326Linux 5.3Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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