CVE-2024-35997: HID: i2c-hid: remove I2C_HID_READ_PENDING flag to prevent lock-up
First published: Mon May 20 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: HID: i2c-hid: remove I2C_HID_READ_PENDING flag to prevent lock-up The flag I2C_HID_READ_PENDING is used to serialize I2C operations. However, this is not necessary, because I2C core already has its own locking for that. More importantly, this flag can cause a lock-up: if the flag is set in i2c_hid_xfer() and an interrupt happens, the interrupt handler (i2c_hid_irq) will check this flag and return immediately without doing anything, then the interrupt handler will be invoked again in an infinite loop. Since interrupt handler is an RT task, it takes over the CPU and the flag-clearing task never gets scheduled, thus we have a lock-up. Delete this unnecessary flag.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=3.8<4.19.313 | |
| Linux Kernel | >=4.20<5.4.275 | |
| Linux Kernel | >=5.5<5.10.216 | |
| Linux Kernel | >=5.11<5.15.158 | |
| Linux Kernel | >=5.16<6.1.90 | |
| Linux Kernel | >=6.2<6.6.30 | |
| Linux Kernel | >=6.7<6.8.9 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.135-1 6.12.25-1 6.12.27-1 |
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Reference Links
- https://git.kernel.org/stable/c/0561b65fbd53d3e788c5b0222d9112ca016fd6a1
- https://git.kernel.org/stable/c/21bfca822cfc1e71796124e93b46e0d9fa584401
- https://git.kernel.org/stable/c/29e94f295bad5be59cf4271a93e22cdcf5536722
- https://git.kernel.org/stable/c/418c5575d56410c6e186ab727bf32ae32447d497
- https://git.kernel.org/stable/c/5095b93021b899f54c9355bebf36d78854c33a22
- https://git.kernel.org/stable/c/9c0f59e47a90c54d0153f8ddc0f80d7a36207d0e
- https://git.kernel.org/stable/c/b65fb50e04a95eec34a9d1bc138454a98a5578d8
- https://git.kernel.org/stable/c/c448a9fd50f77e8fb9156ff64848aa4295eb3003
- https://launchpad.net/bugs/cve/CVE-2024-35997
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-35997
- https://nvd.nist.gov/vuln/detail/CVE-2024-35997
- https://security-tracker.debian.org/tracker/CVE-2024-35997
- https://ubuntu.com/security/CVE-2024-35997
- https://git.kernel.org/linus/9c0f59e47a90c54d0153f8ddc0f80d7a36207d0e
Frequently Asked Questions
What is the severity of CVE-2024-35997?
CVE-2024-35997 has not been assigned a CVSS score but is considered significant due to its potential impact on I2C operations.
How do I fix CVE-2024-35997?
To fix CVE-2024-35997, upgrade to Linux kernel versions 5.10.223-1, 5.10.226-1, 6.1.123-1, 6.1.119-1, 6.12.9-1, or 6.12.10-1.
What impact does CVE-2024-35997 have on the Linux kernel?
CVE-2024-35997 can lead to lock-ups in I2C operations by improperly handling the I2C_HID_READ_PENDING flag.
Which Linux kernel versions are affected by CVE-2024-35997?
CVE-2024-35997 affects various versions of the Linux kernel from 3.8 up to 6.8.9.
Is there a workaround for CVE-2024-35997?
There is no documented workaround for CVE-2024-35997; updating the kernel is recommended.
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