Description
In the Linux kernel, the following vulnerability has been resolved: HID: ft260: fix stack-use-after-return write in I2C read race ft260_i2c_read() points dev->read_buf at a caller-supplied buffer (often an on-stack variable), arms a completion and waits up to five seconds for the device to return the data. The HID input callback ft260_raw_event() runs in the input/IRQ path, independent of the dev->lock mutex held by the read path, and copies the device-supplied payload into dev->read_buf after a plain NULL check. These two paths share read_buf, read_idx and read_len with no serialization. If the device delays its response until the read times out, ft260_i2c_read() resets the controller, clears read_buf and returns, unwinding the stack frame the buffer lived in. A response that arrives at that moment lets ft260_raw_event() pass the NULL check and then memcpy() the device-controlled payload into the now-freed stack location, a bounded but attacker-influenced stack-use-after-return write triggerable by malicious or malfunctioning hardware. Add a dedicated spinlock that serializes every access to read_buf, read_idx and read_len. ft260_raw_event() now holds it across the NULL check, the memcpy and the index update, while the read path takes it when arming and when clearing the buffer, so the teardown can no longer slip between the check and the copy.
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
6a82582d9fa438045191074856f47165334f2777 to < 2b907001e8a83cdb71e899fd3d77ab51e2c03f10affected6a82582d9fa438045191074856f47165334f2777 to < 90e9298f2e4336a0e1ca7eeb173403df78056164affected6a82582d9fa438045191074856f47165334f2777 to < 460514d46e8892189fc933a1b4433811cfa5c309affected6a82582d9fa438045191074856f47165334f2777 to < 5aa5a1b7cc4b4bec5497ad9ef113fdfe37b232f3affected6a82582d9fa438045191074856f47165334f2777 to < a8e1f970f9040294cfd9100c681c32af6c2aeec0affected6a82582d9fa438045191074856f47165334f2777 to < d7ffbdc076675c84128d5b904e4d5167fe9f3a7faffected6a82582d9fa438045191074856f47165334f2777 to < 77832d8f1c81d9f84b6b54807fb278586001d754affected6a82582d9fa438045191074856f47165334f2777 to < bf3e39df3a397fd82967a31d17c4e02c7feab221affected
Linux Linux
Default version status: affected
5.13affected0 to < 5.13unaffected5.15.220 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/2b907001e8a83cdb71e899fd3d77ab51e2c03f10 ↗
- https://git.kernel.org/stable/c/90e9298f2e4336a0e1ca7eeb173403df78056164 ↗
- https://git.kernel.org/stable/c/460514d46e8892189fc933a1b4433811cfa5c309 ↗
- https://git.kernel.org/stable/c/5aa5a1b7cc4b4bec5497ad9ef113fdfe37b232f3 ↗
- https://git.kernel.org/stable/c/a8e1f970f9040294cfd9100c681c32af6c2aeec0 ↗
- https://git.kernel.org/stable/c/d7ffbdc076675c84128d5b904e4d5167fe9f3a7f ↗
- https://git.kernel.org/stable/c/77832d8f1c81d9f84b6b54807fb278586001d754 ↗
- https://git.kernel.org/stable/c/bf3e39df3a397fd82967a31d17c4e02c7feab221 ↗