CVE-2021-47153
In the Linux kernel, the following vulnerability has been resolved: i2c: i801: Don't generate an interrupt on bus reset Now that the i2c-i801 driver supports i…
Impact
In the Linux kernel, the following vulnerability has been resolved: i2c: i801: Don't generate an interrupt on bus reset Now that the i2c-i801 driver supports interrupts, setting the KILL bit in a attempt to recover from a timed out transaction triggers an interrupt. Unfortunately, the interrupt handler (i801_isr) is not prepared for this situation and will try to process the interrupt as if it was signaling the end of a successful transaction. In the case of a block transaction, this can result in an out-of-range memory access. This condition was reproduced several times by syzbot: https://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e https://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e https://syzkaller.appspot.com/bug?extid=c8ff0b6d6c73d81b610e https://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb https://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a https://syzkaller.appspot.com/bug?extid=b4d3fd1dfd53e90afd79 So disable interrupts while trying to reset the bus. Interrupts will be enabled again for the following transaction.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 3.6 before 4.4.271 from 4.5 before 4.9.271 from 4.10 before 4.14.235 from 4.15 before 4.19.193 from 4.20 before 5.4.124 from 5.5 before 5.10.42 |
Weakness classification
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b
- https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3
- https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362a
- https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef
- https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c
- https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6
- https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24b
- https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629
- https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b
- https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3
- https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362a
- https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef
- https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c
- https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6
- https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24b
- https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629