ALSA: caiaq: unregister the input device when probe fails
In the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: unregister the input device when probe fails setup_card() registers the input device, whose name and phys point into struct snd_usb_caiaqdev, and then goes on to snd_card_register() and snd_usb_caiaq_control_init(). If either fails, snd_probe() calls snd_card_free(), which frees the device state but leaves the input device registered: card_free() only clears the pointer, and the input device is unregistered from snd_disconnect() alone. Reading its "uevent" attribute afterwards dereferences freed memory: BUG: KASAN: slab-use-after-free in string+0x4a9/0x4f0 Read of size 1 at addr ffff8880208f5043 by task caiaq/4967 add_uevent_var+0x183/0x3a0 input_dev_uevent+0x162/0x900 dev_uevent+0x2f1/0x870 uevent_show+0x1ca/0x3a0 ... Unregister the input device on the probe error path, as snd_disconnect() does. snd_usb_caiaq_input_disconnect() is a no-op when no input device was registered. Reproduced with a raw-gadget Audio Kontrol 1 and a temporary hack that makes snd_usb_caiaq_control_init() fail.
CVE-2026-98837
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-2026-98837
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": "f537e3ad69609f6924a4db6b4a7f6561f5288bdd",
"lessThan": "df2787819bd137111b56b8631dd581b0cce7144d",
"versionType": "git"
},
{
"status": "affected",
"version": "6251e3e256337a30160ef59ab1580dde4d1acd28",
"lessThan": "850810c12686f80cdf7530f4f21e0157d904f739",
"versionType": "git"
},
{
"status": "affected",
"version": "e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056",
"lessThan": "84727facd8506140cd04f2b0a8b1c4ddeac41cea",
"versionType": "git"
},
{
"status": "affected",
"version": "28abd224db4a49560b452115bca3672a20e45b2f",
"lessThan": "2e5a413cc2a489c9427ecd3d73ad764bfb0c7103",
"versionType": "git"
},
{
"status": "affected",
"version": "28abd224db4a49560b452115bca3672a20e45b2f",
"lessThan": "0b7bd20f6379bc5e431fd74d866390f5b5b63f3c",
"versionType": "git"
},
{
"status": "affected",
"version": "da938aa9fc7826901921dcea225948ab21a97e45",
"versionType": "git"
},
{
"status": "affected",
"version": "09616e25f502080ba684fc7fcf959d1376ab756d",
"versionType": "git"
},
{
"status": "affected",
"version": "b956e48371f2ff72b76be9a829800ecec963bd45",
"versionType": "git"
},
{
"status": "affected",
"version": "096dd8519cf2f768e9e14f224b627f7aaee1a9c5",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.140",
"lessThan": "6.6.160",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.86",
"lessThan": "6.12.113",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.27",
"lessThan": "6.18.56",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.258",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.209",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.175",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "7.0.4",
"lessThan": "7.1",
"versionType": "semver"
}
],
"programFiles": [
"sound/usb/caiaq/device.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"sound/usb/caiaq/device.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98837
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48999 · Revision 1
- Added to Heist Feed
- Publisher date