Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 07b8481d4aff73d6f451f25e74ea10240ff5131e before 040843281eebfa110d08fd7fb083fe6cb55cea14; affected 07b8481d4aff73d6f451f25e74ea10240ff5131e before 39b12daf1adb80f9595fdfe584961deb80860cbb; affected 07b8481d4aff73d6f451f25e74ea10240ff5131e before d99ba93c35ff2d5276e9c2632967481bd53a79d0; affected 07b8481d4aff73d6f451f25e74ea10240ff5131e before 5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6; affected 07b8481d4aff73d6f451f25e74ea10240ff5131e before b78150729762d47c14fe29a2582bdca5568e62b8; affected 07b8481d4aff73d6f451f25e74ea10240ff5131e before 8301c335305344d4da4ab9442b6a399dacfe5b8d; affected 07b8481d4aff73d6f451f25e74ea10240ff5131e before f3d5e77b27fded71dcb97f409262bf0abba0410e; affected 07b8481d4aff73d6f451f25e74ea10240ff5131e before 66725039f7090afe14c31bd259e2059a68f04023 |
| Linux / Linux | affected 3.6; unaffected 0 before 3.6; unaffected 5.10.266 through 5.10.*; unaffected 5.15.217 through 5.15.*; unaffected 6.1.184 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.96 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
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