Answer in brief
CVE-2026-90024 records a Unknown severity vulnerability in usb: gadget: midi2: Fix null-pointer dereference in f_midi2_free_ep_reqs. 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 | >=8b645922b22303cec4628dbbbf6c8553d1cdec87 <51ddc55c75087ac25342f6d73d3aeaf14f59bd76 || >=8b645922b22303cec4628dbbbf6c8553d1cdec87 <5b92f6a0c7c01efbb335d837ecdf34d38d98720f || >=8b645922b22303cec4628dbbbf6c8553d1cdec87 <9c3d5091e3568ed48ac4c5b08a78eb06fad0d70a || >=8b645922b22303cec4628dbbbf6c8553d1cdec87 <4079f19a0e1ce76f1e21a398f02aca150ceaaf61 || >=8b645922b22303cec4628dbbbf6c8553d1cdec87 <f0efaf1872949e96d213c8e910fd9517f7d7c406 | 51ddc55c75087ac25342f6d73d3aeaf14f59bd76, 5b92f6a0c7c01efbb335d837ecdf34d38d98720f, 9c3d5091e3568ed48ac4c5b08a78eb06fad0d70a, 4079f19a0e1ce76f1e21a398f02aca150ceaaf61, f0efaf1872949e96d213c8e910fd9517f7d7c406 |
| Linux/Linuxgeneric | 6.6 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: midi2: Fix null-pointer dereference in f_midi2_free_ep_reqs A null-pointer dereference occurs in f_midi2_free_ep_reqs() when attempting to clean up an endpoint that was never initialized. When configuring the MIDI 2.0 gadget via configfs and setting the block direction to SNDRV_UMP_DIR_INPUT, the initialization of the midi1_ep_out endpoint is explicitly skipped during the gadget bind phase (f_midi2_bind()). As a result, the usb_ep->card field remains NULL. Later, when the host sets the alternate setting, f_midi2_set_alt() unconditionally stops both the IN and OUT endpoints by calling f_midi2_stop_eps(), which in turn calls f_midi2_free_ep_reqs() for both endpoints. When f_midi2_free_ep_reqs() is called for the uninitialized midi1_ep_out, it attempts to dereference usb_ep->card to determine the number of requests to free, leading to a crash. Fix this by using usb_ep->num_reqs instead of usb_ep->card->info.num_reqs in f_midi2_free_ep_reqs(). usb_ep->num_reqs is correctly set during f_midi2_init_ep() and remains 0 if the endpoint was never initialized, safely avoiding the loop. For consistency, apply the same change to f_midi2_alloc_ep_reqs(). Oops: general protection fault, probably for non-canonical address 0xdffffc00000000ee: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000770-0x0000000000000777] ... RIP: 0010:f_midi2_free_ep_reqs drivers/usb/gadget/function/f_midi2.c:1166 [inline] RIP: 0010:f_midi2_stop_eps+0x28e/0x4d0 drivers/usb/gadget/function/f_midi2.c:1246 ... Call Trace: <TASK> f_midi2_set_alt+0x11c/0xf00 drivers/usb/gadget/function/f_midi2.c:1296 composite_setup+0x1ffd/0x3480 drivers/usb/gadget/composite.c:1933 configfs_composite_setup+0xbd/0x100 drivers/usb/gadget/configfs.c:1877
Quoted source text, attributed separately from HOL analysis.