{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-90024", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.782Z", "datePublished": "2026-09-16T10:33:27.624Z", "dateUpdated": "2026-10-19T08:56:38.894Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:56:38.894Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: midi2: Fix null-pointer dereference in f_midi2_free_ep_reqs\n\nA null-pointer dereference occurs in f_midi2_free_ep_reqs() when attempting\nto clean up an endpoint that was never initialized.\n\nWhen configuring the MIDI 2.0 gadget via configfs and setting the block\ndirection to SNDRV_UMP_DIR_INPUT, the initialization of the midi1_ep_out\nendpoint is explicitly skipped during the gadget bind phase\n(f_midi2_bind()). As a result, the usb_ep->card field remains NULL.\n\nLater, when the host sets the alternate setting, f_midi2_set_alt()\nunconditionally stops both the IN and OUT endpoints by calling\nf_midi2_stop_eps(), which in turn calls f_midi2_free_ep_reqs() for both\nendpoints. When f_midi2_free_ep_reqs() is called for the uninitialized\nmidi1_ep_out, it attempts to dereference usb_ep->card to determine the\nnumber of requests to free, leading to a crash.\n\nFix this by using usb_ep->num_reqs instead of usb_ep->card->info.num_reqs\nin f_midi2_free_ep_reqs(). usb_ep->num_reqs is correctly set during\nf_midi2_init_ep() and remains 0 if the endpoint was never initialized,\nsafely avoiding the loop. For consistency, apply the same change to\nf_midi2_alloc_ep_reqs().\n\nOops: general protection fault, probably for non-canonical address\n0xdffffc00000000ee: 0000 [#1] SMP KASAN NOPTI\nKASAN: null-ptr-deref in range [0x0000000000000770-0x0000000000000777]\n...\nRIP: 0010:f_midi2_free_ep_reqs drivers/usb/gadget/function/f_midi2.c:1166\n[inline]\nRIP: 0010:f_midi2_stop_eps+0x28e/0x4d0\ndrivers/usb/gadget/function/f_midi2.c:1246\n...\nCall Trace:\n \n f_midi2_set_alt+0x11c/0xf00 drivers/usb/gadget/function/f_midi2.c:1296\n composite_setup+0x1ffd/0x3480 drivers/usb/gadget/composite.c:1933\n configfs_composite_setup+0xbd/0x100 drivers/usb/gadget/configfs.c:1877" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/usb/gadget/function/f_midi2.c" ], "versions": [ { "version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "lessThan": "51ddc55c75087ac25342f6d73d3aeaf14f59bd76", "status": "affected", "versionType": "git" }, { "version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "lessThan": "5b92f6a0c7c01efbb335d837ecdf34d38d98720f", "status": "affected", "versionType": "git" }, { "version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "lessThan": "9c3d5091e3568ed48ac4c5b08a78eb06fad0d70a", "status": "affected", "versionType": "git" }, { "version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "lessThan": "4079f19a0e1ce76f1e21a398f02aca150ceaaf61", "status": "affected", "versionType": "git" }, { "version": "8b645922b22303cec4628dbbbf6c8553d1cdec87", "lessThan": "f0efaf1872949e96d213c8e910fd9517f7d7c406", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/usb/gadget/function/f_midi2.c" ], "versions": [ { "version": "6.6", "status": "affected" }, { "version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.51" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.2.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/51ddc55c75087ac25342f6d73d3aeaf14f59bd76" }, { "url": "https://git.kernel.org/stable/c/5b92f6a0c7c01efbb335d837ecdf34d38d98720f" }, { "url": "https://git.kernel.org/stable/c/9c3d5091e3568ed48ac4c5b08a78eb06fad0d70a" }, { "url": "https://git.kernel.org/stable/c/4079f19a0e1ce76f1e21a398f02aca150ceaaf61" }, { "url": "https://git.kernel.org/stable/c/f0efaf1872949e96d213c8e910fd9517f7d7c406" } ], "title": "usb: gadget: midi2: Fix null-pointer dereference in f_midi2_free_ep_reqs", "x_generator": { "engine": "bippy-1.2.0" } } } }