HID: magicmouse: prevent unbounded recursion in magicmouse_raw_event()
Summary
| CVE | CVE-2026-80783 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-04 16:18:04 UTC |
| Updated | 2026-09-04 16:18:04 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.001950000 probability, percentile 0.092690000 (date 2026-09-07)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected a462230e16acc8664145216da3c928d03556691a 26c45abed62536aabf4033fb6d64cf72e93374e9 git | Not specified |
| CNA | Linux | Linux | affected a462230e16acc8664145216da3c928d03556691a 8a10a624996f16628234306b46f0cf36707d78bd git | Not specified |
| CNA | Linux | Linux | affected a462230e16acc8664145216da3c928d03556691a d16df755b4493b6d37803c628b2c621d096796a8 git | Not specified |
| CNA | Linux | Linux | affected a462230e16acc8664145216da3c928d03556691a bec338b07beb883726b32192c8f01c601bc76fda git | Not specified |
| CNA | Linux | Linux | affected a462230e16acc8664145216da3c928d03556691a 70589b0c005db003f6d8ae4db3c4d54fed7b83e4 git | Not specified |
| CNA | Linux | Linux | affected a462230e16acc8664145216da3c928d03556691a a33a596d3ad8dfe6c96a368097a028abeee16c17 git | Not specified |
| CNA | Linux | Linux | affected a462230e16acc8664145216da3c928d03556691a d095de37f78c5f32a4252ef0f99b84ba76550b86 git | Not specified |
| CNA | Linux | Linux | affected a462230e16acc8664145216da3c928d03556691a db8d634128d2ba88d79c0b601e983ebe14bb0519 git | Not specified |
| CNA | Linux | Linux | affected 2.6.37 | Not specified |
| CNA | Linux | Linux | unaffected 2.6.37 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.220 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.187 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.156 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.108 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.49 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.11 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.1 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/a33a596d3ad8dfe6c96a368097a028abeee16c17 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/bec338b07beb883726b32192c8f01c601bc76fda | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d16df755b4493b6d37803c628b2c621d096796a8 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/db8d634128d2ba88d79c0b601e983ebe14bb0519 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/70589b0c005db003f6d8ae4db3c4d54fed7b83e4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d095de37f78c5f32a4252ef0f99b84ba76550b86 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/8a10a624996f16628234306b46f0cf36707d78bd | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/26c45abed62536aabf4033fb6d64cf72e93374e9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.