ALSA: FCP: Use a private URB for the notification endpoint
In the Linux kernel, the following vulnerability has been resolved: ALSA: FCP: Use a private URB for the notification endpoint fcp_init_notify() used mixer->urb, which snd_usb_mixer_status_create() allocates for the optional UAC2 status interrupt endpoint and mixer.c kills, resubmits and frees. On a device with that endpoint, fcp_init_notify()'s "already set up" early return fires on the status URB and returns success without doing anything. No FCP notification URB is submitted, and cmd_done is left zeroed because it is initialised past that early return and nowhere else. fcp_init() then issues init1_opcode and wait_for_completion_timeout() would crash adding to the zeroed wait.head. fcp_cleanup_urb() would also kill and free mixer.c's status URB. Use a separate URB in fcp_data, and initialise cmd_done in fcp_init_private() where fcp_data is allocated. fcp_init_notify() is reached again after suspend via fcp_reinit(), and the URB kill path in fcp_notify() completes cmd_done, leaving a stale count that would satisfy the next command's wait before the device ACKs. Use reinit_completion() to clear it.
CVE-2026-80816
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-2026-80816
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": "46757a3e7d50dac923888e7fbe68377736f13c70",
"lessThan": "65aceb45ca91ddb7f7ed178821f481b34da35543",
"versionType": "git"
},
{
"status": "affected",
"version": "46757a3e7d50dac923888e7fbe68377736f13c70",
"lessThan": "5da21a434171e8ecf1d992c6f1d84c0c706fd395",
"versionType": "git"
},
{
"status": "affected",
"version": "46757a3e7d50dac923888e7fbe68377736f13c70",
"lessThan": "6db3c1d7e2872c9904e05ca8e0515920776a3c9c",
"versionType": "git"
},
{
"status": "affected",
"version": "46757a3e7d50dac923888e7fbe68377736f13c70",
"lessThan": "918b8d231c571c50a00efe92ffc8404a537a0490",
"versionType": "git"
}
],
"programFiles": [
"sound/usb/fcp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.47",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.11",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2.1",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"sound/usb/fcp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80816
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34833 · Revision 1
- Added to Heist Feed
- Publisher date