Description
In the Linux kernel, the following vulnerability has been resolved: Input: mms114 - reject an oversized device packet size mms114_interrupt() reads a packet of touch data from the device into a fixed-size on-stack buffer struct mms114_touch touch[MMS114_MAX_TOUCH]; which holds MMS114_MAX_TOUCH (10) events of MMS114_EVENT_SIZE (8) bytes, i.e. 80 bytes. The length of the I2C read into it is taken verbatim from the device: packet_size = mms114_read_reg(data, MMS114_PACKET_SIZE); if (packet_size <= 0) goto out; ... error = __mms114_read_reg(data, MMS114_INFORMATION, packet_size, (u8 *)touch); packet_size is a single device register byte (0x0F) and the only check is the lower bound packet_size <= 0; it is never bounded against the size of touch[]. A malfunctioning, malicious or counterfeit controller (or an attacker tampering with the I2C bus) can report a packet_size of up to 255, so __mms114_read_reg() writes up to 175 bytes past the end of touch[] on the IRQ-thread stack: a stack out-of-bounds write that can overwrite the stack canary, saved registers and the return address. A well-formed device never reports more than the buffer holds, so reject an oversized packet and drop the report, consistent with the handler's other error paths, rather than reading past the buffer.
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
07b8481d4aff73d6f451f25e74ea10240ff5131e to < 040843281eebfa110d08fd7fb083fe6cb55cea14affected07b8481d4aff73d6f451f25e74ea10240ff5131e to < 39b12daf1adb80f9595fdfe584961deb80860cbbaffected07b8481d4aff73d6f451f25e74ea10240ff5131e to < d99ba93c35ff2d5276e9c2632967481bd53a79d0affected07b8481d4aff73d6f451f25e74ea10240ff5131e to < 5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6affected07b8481d4aff73d6f451f25e74ea10240ff5131e to < b78150729762d47c14fe29a2582bdca5568e62b8affected07b8481d4aff73d6f451f25e74ea10240ff5131e to < 8301c335305344d4da4ab9442b6a399dacfe5b8daffected07b8481d4aff73d6f451f25e74ea10240ff5131e to < f3d5e77b27fded71dcb97f409262bf0abba0410eaffected07b8481d4aff73d6f451f25e74ea10240ff5131e to < 66725039f7090afe14c31bd259e2059a68f04023affected
Linux Linux
Default version status: affected
3.6affected0 to < 3.6unaffected5.10.266 to ≤ 5.10.*unaffected5.15.217 to ≤ 5.15.*unaffected6.1.184 to ≤ 6.1.*unaffected6.6.145 to ≤ 6.6.*unaffected6.12.96 to ≤ 6.12.*unaffected6.18.39 to ≤ 6.18.*unaffected7.1.4 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/040843281eebfa110d08fd7fb083fe6cb55cea14 ↗
- https://git.kernel.org/stable/c/39b12daf1adb80f9595fdfe584961deb80860cbb ↗
- https://git.kernel.org/stable/c/d99ba93c35ff2d5276e9c2632967481bd53a79d0 ↗
- https://git.kernel.org/stable/c/5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6 ↗
- https://git.kernel.org/stable/c/b78150729762d47c14fe29a2582bdca5568e62b8 ↗
- https://git.kernel.org/stable/c/8301c335305344d4da4ab9442b6a399dacfe5b8d ↗
- https://git.kernel.org/stable/c/f3d5e77b27fded71dcb97f409262bf0abba0410e ↗
- https://git.kernel.org/stable/c/66725039f7090afe14c31bd259e2059a68f04023 ↗