scsi: core: pair EH runtime PM get and put
In the Linux kernel, the following vulnerability has been resolved: scsi: core: pair EH runtime PM get and put shost->eh_noresume is currently consulted twice in one error handling iteration: once before scsi_autopm_get_host() and once again before scsi_autopm_put_host(). That is racy when a PM-triggered error path flips shost->eh_noresume while the SCSI EH thread is still running. The problem flow looks like this: PM path ufshcd_set_dev_pwr_mode() shost->eh_noresume = 1 ufshcd_execute_start_stop <-- trigger EH ... shost->eh_noresume = 0 EH path scsi_error_handler() if (!shost->eh_noresume) scsi_autopm_get_host() <-- skipped ... if (!shost->eh_noresume) scsi_autopm_put_host() <-- executed later In that case one EH iteration can skip autoresume on entry and still drop a runtime PM reference on exit. That leaves an unmatched runtime PM put and can trigger a runtime PM usage count underflow. Fix this by making eh_noresume a regular bool so it can be accessed with READ_ONCE() and WRITE_ONCE(). Snapshot it once per EH iteration and use that snapshot for both runtime PM get and put decisions.
CVE-2026-74754
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-2026-74754
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": "ae0751ffc77e7f21629970fdab5528c573e637f8",
"lessThan": "1ec5f6aa38ea990af37c49af7a4bb3db00da7f9d",
"versionType": "git"
},
{
"status": "affected",
"version": "ae0751ffc77e7f21629970fdab5528c573e637f8",
"lessThan": "0038a2a75a15d163f428c93103c6d02d4d231a7a",
"versionType": "git"
},
{
"status": "affected",
"version": "ae0751ffc77e7f21629970fdab5528c573e637f8",
"lessThan": "fdc93f4a801077efbf1b87570ade8d8f325de62f",
"versionType": "git"
},
{
"status": "affected",
"version": "ae0751ffc77e7f21629970fdab5528c573e637f8",
"lessThan": "e83eed1bea142c8fe852fd53156845b88252ecd8",
"versionType": "git"
},
{
"status": "affected",
"version": "ae0751ffc77e7f21629970fdab5528c573e637f8",
"lessThan": "872f486259ae0bc6b73ca4735a15d013241f73e9",
"versionType": "git"
}
],
"programFiles": [
"drivers/scsi/scsi_error.c",
"drivers/ufs/core/ufshcd.c",
"include/scsi/scsi_host.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.10",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/scsi/scsi_error.c",
"drivers/ufs/core/ufshcd.c",
"include/scsi/scsi_host.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74754
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46601 · Revision 1
- Added to Heist Feed
- Publisher date