firmware_loader: do not queue completed sysfs fallback requests
In the Linux kernel, the following vulnerability has been resolved: firmware_loader: do not queue completed sysfs fallback requests fw_load_sysfs_fallback() calls device_add() before adding the fw_priv to pending_fw_head. device_add() publishes the fallback loading interface, so a userspace helper which discovers the device by scanning sysfs can write 0 to the loading attribute and complete the request before it is queued as pending. In that interleaving firmware_loading_store() calls fw_state_done() while pending_list still points to itself, so it cannot remove an entry from pending_fw_head. The subsequent unconditional list_add() then queues an already-completed fw_priv. Once the request is released, pending_fw_head can retain a pointer to freed memory and the next fallback request can fault while validating the list. Only in-flight fallback requests need suspend or reboot abort handling. If the request is already DONE after device_add(), return success from the fallback path without sending another uevent, waiting again, or queueing it as pending. This preserves the invariant that pending_fw_head contains only active fallback requests.
CVE-2026-90284
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-2026-90284
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": "ecb739cf15a9bae040ce6b60209b78b92512d120",
"lessThan": "c8b97c5130f27b64fa2cfe1aa4bebb13f724c6c7",
"versionType": "git"
},
{
"status": "affected",
"version": "75d95e2e39b27f733f21e6668af1c9893a97de5e",
"lessThan": "93a2385730540105df8524447dcc11309ad280f9",
"versionType": "git"
},
{
"status": "affected",
"version": "75d95e2e39b27f733f21e6668af1c9893a97de5e",
"lessThan": "ea33fac0df7fe7b49a4b27acb83e227b82317d1d",
"versionType": "git"
},
{
"status": "affected",
"version": "75d95e2e39b27f733f21e6668af1c9893a97de5e",
"lessThan": "5a250bff75a446374c05622973b18b4ab662b504",
"versionType": "git"
},
{
"status": "affected",
"version": "75d95e2e39b27f733f21e6668af1c9893a97de5e",
"lessThan": "85aeb8fc61839098ae0942ccba86e669c08e75d4",
"versionType": "git"
},
{
"status": "affected",
"version": "75d95e2e39b27f733f21e6668af1c9893a97de5e",
"lessThan": "6eaa632d0ed7bbb84f9cb670e5ec4e2cecf4cc7b",
"versionType": "git"
},
{
"status": "affected",
"version": "75d95e2e39b27f733f21e6668af1c9893a97de5e",
"lessThan": "fb4824880b0dba0e7b3a497c46c642f979630392",
"versionType": "git"
},
{
"status": "affected",
"version": "75d95e2e39b27f733f21e6668af1c9893a97de5e",
"lessThan": "b48373c901951fad1a26bd7c33ad91172b3945b5",
"versionType": "git"
},
{
"status": "affected",
"version": "67cf0fbcac0d42d4d4686cddc1e39f465bbfec37",
"versionType": "git"
},
{
"status": "affected",
"version": "d09639528b66b5c7c20dc8f7fb8928aacabd40bb",
"versionType": "git"
},
{
"status": "affected",
"version": "c14a54675db7131791402fa22fb0fa6da1f5fb66",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.58",
"lessThan": "5.10.270",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.203",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.140",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.13.10",
"lessThan": "5.14",
"versionType": "semver"
}
],
"programFiles": [
"drivers/base/firmware_loader/fallback.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"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/base/firmware_loader/fallback.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90284
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36642 · Revision 1
- Added to Heist Feed
- Publisher date