HID: uclogic: fix use-after-free of inrange_timer on remove
In the Linux kernel, the following vulnerability has been resolved: HID: uclogic: fix use-after-free of inrange_timer on remove uclogic_remove() cancels the pen in-range timer and then stops the device: timer_delete_sync(&drvdata->inrange_timer); hid_hw_stop(hdev); timer_delete_sync() only guarantees the timer is idle at that instant. uclogic_raw_event_pen() keeps delivering pen reports until hid_hw_stop() stops the transport several lines later, and every report with pen->inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE re-arms the timer: mod_timer(&drvdata->inrange_timer, jiffies + msecs_to_jiffies(100)); A report landing between the timer_delete_sync() call and the transport teardown in hid_hw_stop() re-arms inrange_timer after it was cancelled. uclogic_remove() then returns and the devm drvdata is freed, while hid_hw_stop() has already freed the input device drvdata->pen_input points at, so when the timer fires ~100 ms later uclogic_inrange_timeout() dereferences freed memory -- a use-after-free in timer-softirq context. Swapping the two calls is not a fix: stopping the device first frees drvdata->pen_input via hidinput_disconnect() while the timer may still be pending, so a timer already armed before removal fires on the freed input device in the window before timer_delete_sync() runs. Use timer_shutdown_sync() before hid_hw_stop() instead. It cancels the timer, waits for a running callback while pen_input is still valid, and prevents any further re-arming -- a later mod_timer
CVE-2026-80766
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-2026-80766
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": "01309e29eb95c16bd48984f2589fad0cbf5e27d1",
"lessThan": "f40243358b407aec362fe305fabfcdc94a3abd89",
"versionType": "git"
},
{
"status": "affected",
"version": "01309e29eb95c16bd48984f2589fad0cbf5e27d1",
"lessThan": "dc5108f18f58870a8dd4203a02a47e571a2be7f0",
"versionType": "git"
},
{
"status": "affected",
"version": "01309e29eb95c16bd48984f2589fad0cbf5e27d1",
"lessThan": "9d77ac82e57ead056cf3f71d347083ed9244ad90",
"versionType": "git"
},
{
"status": "affected",
"version": "01309e29eb95c16bd48984f2589fad0cbf5e27d1",
"lessThan": "e750cdb6de009aace3c77f37fe2173f96175e8e4",
"versionType": "git"
},
{
"status": "affected",
"version": "01309e29eb95c16bd48984f2589fad0cbf5e27d1",
"lessThan": "849e537160bbb77fe419ecc3944bfe125dcd441b",
"versionType": "git"
},
{
"status": "affected",
"version": "01309e29eb95c16bd48984f2589fad0cbf5e27d1",
"lessThan": "f1b3ca06380531f49f988f4721d3ed30b0d7a5d2",
"versionType": "git"
},
{
"status": "affected",
"version": "01309e29eb95c16bd48984f2589fad0cbf5e27d1",
"lessThan": "f13d0a00204b05e62336da0ab72ea0d87b56690c",
"versionType": "git"
},
{
"status": "affected",
"version": "01309e29eb95c16bd48984f2589fad0cbf5e27d1",
"lessThan": "506fd50a9027340f0e9dcc587d10ccb03312dba6",
"versionType": "git"
}
],
"programFiles": [
"drivers/hid/hid-uclogic-core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.220",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.187",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.156",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.108",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"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": [
"drivers/hid/hid-uclogic-core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80766
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34785 · Revision 1
- Added to Heist Feed
- Publisher date