CVE-2025-38483: comedi: das16m1: Fix bit shift out of bounds
In the Linux kernel, the following vulnerability has been resolved:
comedi: das16m1: Fix bit shift out of bounds
When checking for a supported IRQ number, the following test is used:
/ only irqs 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, and 15 are valid / if ((1 << it->options[1]) & 0xdcfc) {
However, it->options[i] is an unchecked int value from userspace, so the shift amount could be negative or out of bounds. Fix the test by requiring it->options[1] to be within bounds before proceeding with the original test.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.113-1Fixed in 7.2.12-1Fixed in 7.2.13-1
Event History
Frequently Asked Questions
What is the severity of CVE-2025-38483?
CVE-2025-38483 is rated as a medium severity vulnerability due to improper checking of IRQ numbers in the Linux kernel.
How does CVE-2025-38483 affect systems running the Linux kernel?
CVE-2025-38483 can lead to potential out-of-bounds bit shifts affecting system stability and security in devices using the affected kernel.
What versions of the Linux kernel are impacted by CVE-2025-38483?
CVE-2025-38483 affects multiple versions of the Linux kernel, particularly those that utilize the comedi das16m1 driver.
How do I fix CVE-2025-38483 in my Linux kernel?
To fix CVE-2025-38483, update your Linux kernel to the latest patched version provided by your distribution.
Is CVE-2025-38483 actively being exploited?
As of now, there are no publicly reported active exploits for CVE-2025-38483, but it is advisable to apply patches.