Unknown

CVE-2026-80783 — 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.

Published Sep 4, 2026 · Updated Oct 19, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.2%

ahead of 9% of scored CVEs · Oct 26, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ a462230e16acc8664145216da3c928d03556691a and < 26c45abed62536aabf4033fb6d64cf72e93374e9≥ a462230e16acc8664145216da3c928d03556691a and < 8a10a624996f16628234306b46f0cf36707d78bd≥ a462230e16acc8664145216da3c928d03556691a and < d16df755b4493b6d37803c628b2c621d096796a8≥ a462230e16acc8664145216da3c928d03556691a and < bec338b07beb883726b32192c8f01c601bc76fda≥ a462230e16acc8664145216da3c928d03556691a and < 70589b0c005db003f6d8ae4db3c4d54fed7b83e4≥ a462230e16acc8664145216da3c928d03556691a and < a33a596d3ad8dfe6c96a368097a028abeee16c17≥ a462230e16acc8664145216da3c928d03556691a and < d095de37f78c5f32a4252ef0f99b84ba76550b86≥ a462230e16acc8664145216da3c928d03556691a and < db8d634128d2ba88d79c0b601e983ebe14bb0519 and 1 more version 2.6.37	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 26, 2026 · 11 reading(s) · max 0.20%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 4, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 19, 2026 – Oct 19, 2026
1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

10 on the record

git.kernel.org/stable/c/70589b0c005db003f6d8ae4db3c4d54fed7b83e4
NIST National Vulnerability Database
git.kernel.org/stable/c/d16df755b4493b6d37803c628b2c621d096796a8
NIST National Vulnerability Database
git.kernel.org/stable/c/26c45abed62536aabf4033fb6d64cf72e93374e9
NIST National Vulnerability Database
github.com/advisories/GHSA-846j-3r8r-8xv8
GitHub Security Advisories
git.kernel.org/stable/c/d095de37f78c5f32a4252ef0f99b84ba76550b86
NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2026-80783
GitHub Security Advisories
git.kernel.org/stable/c/8a10a624996f16628234306b46f0cf36707d78bd
NIST National Vulnerability Database
git.kernel.org/stable/c/db8d634128d2ba88d79c0b601e983ebe14bb0519
NIST National Vulnerability Database
git.kernel.org/stable/c/bec338b07beb883726b32192c8f01c601bc76fda
NIST National Vulnerability Database
git.kernel.org/stable/c/a33a596d3ad8dfe6c96a368097a028abeee16c17
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-99092 riscv: patch: fix handling of bpf-jit execmem addresses 23h
Unknown CVE-2026-99093 mm: don't schedule deferred kernel page table freeing while booting 23h
Unknown CVE-2026-99095 drm/vc4: drain the hangcheck timer and works on V3D unbind 23h
Unknown CVE-2026-99096 io_uring/register: don't exempt disabled rings from task restrictions 23h
Unknown CVE-2026-99097 tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper() 23h
Unknown CVE-2026-99098 dm-integrity: fix buffer overflow in inline mode with large tag size 23h

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-80783 is "HID: magicmouse: prevent unbounded recursion in magicmouse_raw_event()", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.20% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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