Answer in brief
CVE-2026-74395 records a Unknown severity vulnerability in RDMA/mlx5: Fix devx subscribe-event unwind NULL dereference. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-74395 records a Unknown severity vulnerability in RDMA/mlx5: Fix devx subscribe-event unwind NULL dereference. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=7597385371425febdaa8c6a1da3625d4ffff16f5 <6e15b770461eeaa0ff73934922cb670a6a9db04e || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <9be9aca28424228586fe9211c373ebdb826ebb6c || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <f345e744b6b087188cde2377da5cbe9713b61353 || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <1025dc2f7ba29b04b8687790fa91f9cd1a53141e || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <7921821fc2b19c01588311f6e7468ae5b68b1f61 || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989 || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <78b9589fda266c71f0f9d0c858d4fa7381a890a5 || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <43f8f7946814c8e5f464518246fdbc69b6e32326 | 6e15b770461eeaa0ff73934922cb670a6a9db04e, 9be9aca28424228586fe9211c373ebdb826ebb6c, f345e744b6b087188cde2377da5cbe9713b61353, 1025dc2f7ba29b04b8687790fa91f9cd1a53141e, 7921821fc2b19c01588311f6e7468ae5b68b1f61, 5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989, 78b9589fda266c71f0f9d0c858d4fa7381a890a5, 43f8f7946814c8e5f464518246fdbc69b6e32326 |
| Linux/Linuxgeneric | 5.3 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=7597385371425febdaa8c6a1da3625d4ffff16f5 <6e15b770461eeaa0ff73934922cb670a6a9db04e || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <9be9aca28424228586fe9211c373ebdb826ebb6c || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <f345e744b6b087188cde2377da5cbe9713b61353 || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <1025dc2f7ba29b04b8687790fa91f9cd1a53141e || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <7921821fc2b19c01588311f6e7468ae5b68b1f61 || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989 || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <78b9589fda266c71f0f9d0c858d4fa7381a890a5 || >=7597385371425febdaa8c6a1da3625d4ffff16f5 <43f8f7946814c8e5f464518246fdbc69b6e32326 | 6e15b770461eeaa0ff73934922cb670a6a9db04e, 9be9aca28424228586fe9211c373ebdb826ebb6c, f345e744b6b087188cde2377da5cbe9713b61353, 1025dc2f7ba29b04b8687790fa91f9cd1a53141e, 7921821fc2b19c01588311f6e7468ae5b68b1f61, 5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989, 78b9589fda266c71f0f9d0c858d4fa7381a890a5, 43f8f7946814c8e5f464518246fdbc69b6e32326 |
| Linux/Linuxgeneric | 5.3 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.