{"id":"CVE-2024-26935","revision":null,"records":[{"revision":"ee8eae05eba44db18662540589407048","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-26935","aliases":[],"title":"scsi: core: Fix unremoved procfs host directory regression","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: core: Fix unremoved procfs host directory regression\n\nCommit fc663711b944 (\"scsi: core: Remove the /proc/scsi/${proc_name}\ndirectory earlier\") fixed a bug related to modules loading/unloading, by\nadding a call to scsi_proc_hostdir_rm() on scsi_remove_host(). But that led\nto a potential duplicate call to the hostdir_rm() routine, since it's also\ncalled from scsi_host_dev_release(). That triggered a regression report,\nwhich was then fixed by commit be03df3d4bfe (\"scsi: core: Fix a procfs host\ndirectory removal regression\"). The fix just dropped the hostdir_rm() call\nfrom dev_release().\n\nBut it happens that this proc directory is created on scsi_host_alloc(),\nand that function \"pairs\" with scsi_host_dev_release(), while\nscsi_remove_host() pairs with scsi_add_host(). In other words, it seems the\nreason for removing the proc directory on dev_release() was meant to cover\ncases in which a SCSI host structure was allocated, but the call to\nscsi_add_host() didn't happen. And that pattern happens to exist in some\nerror paths, for example.\n\nSyzkaller causes that by using USB raw gadget device, error'ing on\nusb-storage driver, at usb_stor_probe2(). By checking that path, we can see\nthat the BadDevice label leads to a scsi_host_put() after a SCSI host\nallocation, but there's no call to scsi_add_host() in such path. That leads\nto messages like this in dmesg (and a leak of the SCSI host proc\nstructure):\n\nusb-storage 4-1:87.51: USB Mass Storage device detected\nproc_dir_entry 'scsi/usb-storage' already registered\nWARNING: CPU: 1 PID: 3519 at fs/proc/generic.c:377 proc_register+0x347/0x4e0 fs/proc/generic.c:376\n\nThe proper fix seems to still call scsi_proc_hostdir_rm() on dev_release(),\nbut guard that with the state check for SHOST_CREATED; there is even a\ncomment in scsi_host_dev_release() detailing that: such conditional is\nmeant for cases where the SCSI host was allocated but there was no calls to\n{add,remove}_host(), like the usb-storage case.\n\nThis is what we propose here and with that, the error path of usb-storage\ndoes not trigger the warning anymore.","state":0,"publishedAt":"2024-05-01T05:17:31.445+00:00","modifiedAt":"2026-10-15T00:39:28.703+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/scsi/hosts.c\"\n ],\n \"versions\": [\n {\n \"version\": \"88c3d3bb6469cea929ac68fd326bdcbefcdfdd83\",\n \"lessThan\": \"0053f15d50d50c9312d8ab9c11e2e405812dfcac\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"68c665bb185037e7eb66fb792c61da9d7151e99c\",\n \"lessThan\": \"5c2386ba80e779a92ec3bb64ccadbedd88f779b1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2a764d55e938743efa7c2cba7305633bcf227f09\",\n \"lessThan\": \"cea234bb214b17d004dfdccce4491e6ff57c96ee\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"7e0ae8667fcdd99d1756922e1140cac75f5fa279\",\n \"lessThan\": \"3678cf67ff7136db1dd3bf63c361650db5d92889\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"be03df3d4bfe7e8866d4aa43d62e648ffe884f5f\",\n \"lessThan\": \"d4c34782b6d7b1e68d18d9549451b19433bd4c6c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"be03df3d4bfe7e8866d4aa43d62e648ffe884f5f\",\n \"lessThan\": \"e293c773c13b830cdc251f155df2254981abc320\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"be03df3d4bfe7e8866d4aa43d62e648ffe884f5f\",\n \"lessThan\": \"f4ff08fab66eb5c0b97e1a24edac052fb40bf5d7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"be03df3d4bfe7e8866d4aa43d62e648ffe884f5f\",\n \"lessThan\": \"f23a4d6e07570826fe95023ca1aa96a011fa9f84\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"73f030d4ef6d1ad17f824a0a2eb637ef7a9c7d51\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5.4.238\",\n \"lessThan\": \"5.4.274\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.176\",\n \"lessThan\": \"5.10.215\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.104\",\n \"lessThan\": \"5.15.154\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.21\",\n \"lessThan\": \"6.1.84\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.2.8\",\n \"lessThan\": \"6.3\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/scsi/hosts.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.3\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.3\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.274\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.215\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.154\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.84\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.24\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.7.12\",\n \"lessThanOrEqual\": \"6.7.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.8.3\",\n \"lessThanOrEqual\": \"6.8.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.9\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/0053f15d50d50c9312d8ab9c11e2e405812dfcac","https://git.kernel.org/stable/c/5c2386ba80e779a92ec3bb64ccadbedd88f779b1","https://git.kernel.org/stable/c/cea234bb214b17d004dfdccce4491e6ff57c96ee","https://git.kernel.org/stable/c/3678cf67ff7136db1dd3bf63c361650db5d92889","https://git.kernel.org/stable/c/d4c34782b6d7b1e68d18d9549451b19433bd4c6c","https://git.kernel.org/stable/c/e293c773c13b830cdc251f155df2254981abc320","https://git.kernel.org/stable/c/f4ff08fab66eb5c0b97e1a24edac052fb40bf5d7","https://git.kernel.org/stable/c/f23a4d6e07570826fe95023ca1aa96a011fa9f84"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-26935","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-26935","identifiers":["CVE-2024-26935"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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