scsi: core: Fix unremoved procfs host directory regression
In the Linux kernel, the following vulnerability has been resolved: scsi: core: Fix unremoved procfs host directory regression Commit fc663711b944 ("scsi: core: Remove the /proc/scsi/${proc_name} directory earlier") fixed a bug related to modules loading/unloading, by adding a call to scsi_proc_hostdir_rm() on scsi_remove_host(). But that led to a potential duplicate call to the hostdir_rm() routine, since it's also called from scsi_host_dev_release(). That triggered a regression report, which was then fixed by commit be03df3d4bfe ("scsi: core: Fix a procfs host directory removal regression"). The fix just dropped the hostdir_rm() call from dev_release(). But it happens that this proc directory is created on scsi_host_alloc(), and that function "pairs" with scsi_host_dev_release(), while scsi_remove_host() pairs with scsi_add_host(). In other words, it seems the reason for removing the proc directory on dev_release() was meant to cover cases in which a SCSI host structure was allocated, but the call to scsi_add_host() didn't happen. And that pattern happens to exist in some error paths, for example. Syzkaller causes that by using USB raw gadget device, error'ing on usb-storage driver, at usb_stor_probe2(). By checking that path, we can see that the BadDevice label leads to a scsi_host_put() after a SCSI host allocation, but there's no call to scsi_add_host() in such path. That leads to messages like this in dmesg (and a leak of the SCSI host proc structure): usb-storage 4-1:8
CVE-2024-26935
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2024-26935
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "88c3d3bb6469cea929ac68fd326bdcbefcdfdd83",
"lessThan": "0053f15d50d50c9312d8ab9c11e2e405812dfcac",
"versionType": "git"
},
{
"status": "affected",
"version": "68c665bb185037e7eb66fb792c61da9d7151e99c",
"lessThan": "5c2386ba80e779a92ec3bb64ccadbedd88f779b1",
"versionType": "git"
},
{
"status": "affected",
"version": "2a764d55e938743efa7c2cba7305633bcf227f09",
"lessThan": "cea234bb214b17d004dfdccce4491e6ff57c96ee",
"versionType": "git"
},
{
"status": "affected",
"version": "7e0ae8667fcdd99d1756922e1140cac75f5fa279",
"lessThan": "3678cf67ff7136db1dd3bf63c361650db5d92889",
"versionType": "git"
},
{
"status": "affected",
"version": "be03df3d4bfe7e8866d4aa43d62e648ffe884f5f",
"lessThan": "d4c34782b6d7b1e68d18d9549451b19433bd4c6c",
"versionType": "git"
},
{
"status": "affected",
"version": "be03df3d4bfe7e8866d4aa43d62e648ffe884f5f",
"lessThan": "e293c773c13b830cdc251f155df2254981abc320",
"versionType": "git"
},
{
"status": "affected",
"version": "be03df3d4bfe7e8866d4aa43d62e648ffe884f5f",
"lessThan": "f4ff08fab66eb5c0b97e1a24edac052fb40bf5d7",
"versionType": "git"
},
{
"status": "affected",
"version": "be03df3d4bfe7e8866d4aa43d62e648ffe884f5f",
"lessThan": "f23a4d6e07570826fe95023ca1aa96a011fa9f84",
"versionType": "git"
},
{
"status": "affected",
"version": "73f030d4ef6d1ad17f824a0a2eb637ef7a9c7d51",
"versionType": "git"
},
{
"status": "affected",
"version": "5.4.238",
"lessThan": "5.4.274",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.176",
"lessThan": "5.10.215",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.104",
"lessThan": "5.15.154",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.21",
"lessThan": "6.1.84",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.2.8",
"lessThan": "6.3",
"versionType": "semver"
}
],
"programFiles": [
"drivers/scsi/hosts.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.274",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.215",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.154",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.84",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.24",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.7.12",
"versionType": "semver",
"lessThanOrEqual": "6.7.*"
},
{
"status": "unaffected",
"version": "6.8.3",
"versionType": "semver",
"lessThanOrEqual": "6.8.*"
},
{
"status": "unaffected",
"version": "6.9",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/scsi/hosts.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-26935
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26462 · Revision 1
- Added to Heist Feed
- Publisher date