smb/server: abort initialization when proc setup fails
In the Linux kernel, the following vulnerability has been resolved: smb/server: abort initialization when proc setup fails ksmbd_server_init() calls ksmbd_proc_init() before creating the remaining proc entries and server subsystems. ksmbd_proc_init() tears down partial state on a procfs or percpu_counter allocation failure, but returns void, so ksmbd_server_init() continues as if the counters were usable. Once userspace starts the server, server_ctrl_handle_init() calls ksmbd_proc_reset(), which reaches percpu_counter_set() with a NULL per-CPU counters pointer on SMP systems. The later ksmbd_proc_create() calls also receive a NULL parent and may create entries in the /proc root; ksmbd_proc_cleanup() cannot remove those entries because ksmbd_proc_fs is NULL.
CVE-2026-90164
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-2026-90164
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": "b38f99c1217ae04753340f0fdcd8f35bf56841dc",
"lessThan": "fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09",
"versionType": "git"
},
{
"status": "affected",
"version": "b38f99c1217ae04753340f0fdcd8f35bf56841dc",
"lessThan": "db97f3763727d652112ae70038d4e17b3ce277bb",
"versionType": "git"
}
],
"programFiles": [
"fs/smb/server/misc.h",
"fs/smb/server/proc.c",
"fs/smb/server/server.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/server/misc.h",
"fs/smb/server/proc.c",
"fs/smb/server/server.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90164
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36551 · Revision 1
- Added to Heist Feed
- Publisher date