CVE-2026-80783

CVE CVE-2026-80783EUVD EUVD-2026-71426Published 2026-09-04T15:12:54.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux patch: 6.6.156; patch: 0; a462230e16acc8664145216da3c928d03556691a <26c45abed62536aabf4033fb6d64cf72e93374e9; a462230e16acc8664145216da3c928d03556691a <a33a596d3ad8dfe6c96a368097a028abeee16c17; a462230e16acc8664145216da3c928d03556691a <db8d634128d2ba88d79c0b601e983ebe14bb0519; a462230e16acc8664145216da3c928d03556691a <8a10a624996f16628234306b46f0cf36707d78bd; a462230e16acc8664145216da3c928d03556691a <bec338b07beb883726b32192c8f01c601bc76fda; a462230e16acc8664145216da3c928d03556691a <70589b0c005db003f6d8ae4db3c4d54fed7b83e4; patch: 6.12.108; patch: 7.1.11; patch: 5.15.220; patch: 7.3-rc1; patch: 7.2.1; patch: 6.1.187; a462230e16acc8664145216da3c928d03556691a <d095de37f78c5f32a4252ef0f99b84ba76550b86; a462230e16acc8664145216da3c928d03556691a <d16df755b4493b6d37803c628b2c621d096796a8; 2.6.37; patch: 6.18.49

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

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