{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2024-26935", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-26935", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-05-01T05:17:31.445Z", "updatedAt": "2026-10-15T00:39:28.703Z", "importedAt": "2026-10-24T01:57:07.518Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "scsi: core: Fix unremoved procfs host directory regression", "summary": "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.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "88c3d3bb6469cea929ac68fd326bdcbefcdfdd83", "status": "affected", "versionType": "git", "lessThan": "0053f15d50d50c9312d8ab9c11e2e405812dfcac" }, { "version": "68c665bb185037e7eb66fb792c61da9d7151e99c", "status": "affected", "versionType": "git", "lessThan": "5c2386ba80e779a92ec3bb64ccadbedd88f779b1" }, { "version": "2a764d55e938743efa7c2cba7305633bcf227f09", "status": "affected", "versionType": "git", "lessThan": "cea234bb214b17d004dfdccce4491e6ff57c96ee" }, { "version": "7e0ae8667fcdd99d1756922e1140cac75f5fa279", "status": "affected", "versionType": "git", "lessThan": "3678cf67ff7136db1dd3bf63c361650db5d92889" }, { "version": "be03df3d4bfe7e8866d4aa43d62e648ffe884f5f", "status": "affected", "versionType": "git", "lessThan": "d4c34782b6d7b1e68d18d9549451b19433bd4c6c" }, { "version": "be03df3d4bfe7e8866d4aa43d62e648ffe884f5f", "status": "affected", "versionType": "git", "lessThan": "e293c773c13b830cdc251f155df2254981abc320" }, { "version": "be03df3d4bfe7e8866d4aa43d62e648ffe884f5f", "status": "affected", "versionType": "git", "lessThan": "f4ff08fab66eb5c0b97e1a24edac052fb40bf5d7" }, { "version": "be03df3d4bfe7e8866d4aa43d62e648ffe884f5f", "status": "affected", "versionType": "git", "lessThan": "f23a4d6e07570826fe95023ca1aa96a011fa9f84" }, { "version": "73f030d4ef6d1ad17f824a0a2eb637ef7a9c7d51", "status": "affected", "versionType": "git" }, { "version": "5.4.238", "status": "affected", "versionType": "semver", "lessThan": "5.4.274" }, { "version": "5.10.176", "status": "affected", "versionType": "semver", "lessThan": "5.10.215" }, { "version": "5.15.104", "status": "affected", "versionType": "semver", "lessThan": "5.15.154" }, { "version": "6.1.21", "status": "affected", "versionType": "semver", "lessThan": "6.1.84" }, { "version": "6.2.8", "status": "affected", "versionType": "semver", "lessThan": "6.3" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.3", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.3" }, { "version": "5.4.274", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.215", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.154", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.84", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.24", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.7.12", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.7.*" }, { "version": "6.8.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.8.*" }, { "version": "6.9", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }