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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
a462230e16acc8664145216da3c928d03556691a to < 26c45abed62536aabf4033fb6d64cf72e93374e9affecteda462230e16acc8664145216da3c928d03556691a to < 8a10a624996f16628234306b46f0cf36707d78bdaffecteda462230e16acc8664145216da3c928d03556691a to < d16df755b4493b6d37803c628b2c621d096796a8affecteda462230e16acc8664145216da3c928d03556691a to < bec338b07beb883726b32192c8f01c601bc76fdaaffecteda462230e16acc8664145216da3c928d03556691a to < 70589b0c005db003f6d8ae4db3c4d54fed7b83e4affecteda462230e16acc8664145216da3c928d03556691a to < a33a596d3ad8dfe6c96a368097a028abeee16c17affecteda462230e16acc8664145216da3c928d03556691a to < d095de37f78c5f32a4252ef0f99b84ba76550b86affecteda462230e16acc8664145216da3c928d03556691a to < db8d634128d2ba88d79c0b601e983ebe14bb0519affected
Linux Linux
Default version status: affected
2.6.37affected0 to < 2.6.37unaffected5.15.220 to ≤ 5.15.*unaffected6.1.187 to ≤ 6.1.*unaffected6.6.156 to ≤ 6.6.*unaffected6.12.108 to ≤ 6.12.*unaffected6.18.49 to ≤ 6.18.*unaffected7.1.11 to ≤ 7.1.*unaffected7.2.1 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/26c45abed62536aabf4033fb6d64cf72e93374e9 ↗
- https://git.kernel.org/stable/c/8a10a624996f16628234306b46f0cf36707d78bd ↗
- https://git.kernel.org/stable/c/d16df755b4493b6d37803c628b2c621d096796a8 ↗
- https://git.kernel.org/stable/c/bec338b07beb883726b32192c8f01c601bc76fda ↗
- https://git.kernel.org/stable/c/70589b0c005db003f6d8ae4db3c4d54fed7b83e4 ↗
- https://git.kernel.org/stable/c/a33a596d3ad8dfe6c96a368097a028abeee16c17 ↗
- https://git.kernel.org/stable/c/d095de37f78c5f32a4252ef0f99b84ba76550b86 ↗
- https://git.kernel.org/stable/c/db8d634128d2ba88d79c0b601e983ebe14bb0519 ↗