CVE-2024-35997
CVE-2024-35997 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-667.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- EPSS exploit prediction: 0% (7th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2024-35715
- Weakness: CWE-667
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2024-35997?
- 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.
- How severe is CVE-2024-35997?
- CVE-2024-35997 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2024-35997 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2024-35997?
- CVE-2024-35997 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2024-35997?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2024-35997 have an EU (EUVD) identifier?
- Yes. CVE-2024-35997 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-35715.
- When was CVE-2024-35997 published?
- CVE-2024-35997 was published on 2024-05-20 and last updated on 2026-06-17.
References
- 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://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Affected products (1)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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