HID: magicmouse: prevent unbounded recursion in magicmouse_raw_event()
In the Linux kernel, the following vulnerability has been resolved: HID: magicmouse: prevent unbounded recursion in magicmouse_raw_event() magicmouse_raw_event() handles DOUBLE_REPORT_ID (0xf7) packets, which pack two touch reports into one, by splitting the packet and calling itself on each half. The only guard against runaway recursion is a "size < 1" check, which stops zero-sized calls but does not bound the recursion depth. A malicious HID device that matches this driver can send a report starting with DOUBLE_REPORT_ID and filled with the sequence [0xf7, 0x00]. Each level consumes two bytes and recurses on the remainder, so an incoming report of up to HID_MAX_BUFFER_SIZE (16 KiB) drives roughly 8000 nested calls. That easily exhausts the 16 KiB kernel stack, leading to a stack overflow: a panic with CONFIG_VMAP_STACK, or memory corruption without it. A double report only ever wraps two normal reports; it is never legitimately nested. Refuse to re-enter the DOUBLE_REPORT_ID case from a recursive call so the recursion depth is bounded to two, while all valid packets keep being parsed exactly as before.
CVE-2026-80783
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-2026-80783
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": "a462230e16acc8664145216da3c928d03556691a",
"lessThan": "26c45abed62536aabf4033fb6d64cf72e93374e9",
"versionType": "git"
},
{
"status": "affected",
"version": "a462230e16acc8664145216da3c928d03556691a",
"lessThan": "8a10a624996f16628234306b46f0cf36707d78bd",
"versionType": "git"
},
{
"status": "affected",
"version": "a462230e16acc8664145216da3c928d03556691a",
"lessThan": "d16df755b4493b6d37803c628b2c621d096796a8",
"versionType": "git"
},
{
"status": "affected",
"version": "a462230e16acc8664145216da3c928d03556691a",
"lessThan": "bec338b07beb883726b32192c8f01c601bc76fda",
"versionType": "git"
},
{
"status": "affected",
"version": "a462230e16acc8664145216da3c928d03556691a",
"lessThan": "70589b0c005db003f6d8ae4db3c4d54fed7b83e4",
"versionType": "git"
},
{
"status": "affected",
"version": "a462230e16acc8664145216da3c928d03556691a",
"lessThan": "a33a596d3ad8dfe6c96a368097a028abeee16c17",
"versionType": "git"
},
{
"status": "affected",
"version": "a462230e16acc8664145216da3c928d03556691a",
"lessThan": "d095de37f78c5f32a4252ef0f99b84ba76550b86",
"versionType": "git"
},
{
"status": "affected",
"version": "a462230e16acc8664145216da3c928d03556691a",
"lessThan": "db8d634128d2ba88d79c0b601e983ebe14bb0519",
"versionType": "git"
}
],
"programFiles": [
"drivers/hid/hid-magicmouse.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.37"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.37",
"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": "6.18.49",
"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-magicmouse.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80783
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34801 · Revision 1
- Added to Heist Feed
- Publisher date