firmware: arm_scmi: Quiesce notifications before teardown
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Quiesce notifications before teardown scmi_notification_exit() clears and releases the notification instance, but transport callbacks can still deliver incoming notifications until the TX/RX channels are freed. During remove, an RX interrupt in that window can enter scmi_notify() while notification state is being torn down and then dereference freed memory. The same ordering exists on the probe error path after notification initialization. The notification late-init worker has a separate lifetime issue: protocol event registration queues ni->init_work on the system workqueue, so destroying ni->notify_wq does not drain that work. If the devres group is released while init_work is still pending or running, the late-init worker can dereference the freed notification instance. Quiesce the notification core before TX/RX channels are torn down, then clean up the channels before releasing the notification core resources. Use disable_work_sync() so future late-init queueing is rejected and any already queued or running late-init work has completed before channel teardown starts.
CVE-2026-93091
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-2026-93091
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": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e",
"lessThan": "6778bcabd2e0c32f73476f0bc6369013692540be",
"versionType": "git"
},
{
"status": "affected",
"version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e",
"lessThan": "2aac23bc0a79af41104d99823bb250fae92ba144",
"versionType": "git"
},
{
"status": "affected",
"version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e",
"lessThan": "5e30d3d16d1a9e599be4dcea872874e65e2c277b",
"versionType": "git"
},
{
"status": "affected",
"version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e",
"lessThan": "8e49055d0d495c9c07575ad8e111d9eaf0efb13f",
"versionType": "git"
}
],
"programFiles": [
"drivers/firmware/arm_scmi/driver.c",
"drivers/firmware/arm_scmi/notify.c",
"drivers/firmware/arm_scmi/notify.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/firmware/arm_scmi/driver.c",
"drivers/firmware/arm_scmi/notify.c",
"drivers/firmware/arm_scmi/notify.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93091
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #37820 · Revision 1
- Added to Heist Feed
- Publisher date