CVE-2025-38482: comedi: das6402: Fix bit shift out of bounds
In the Linux kernel, the following vulnerability has been resolved:
comedi: das6402: Fix bit shift out of bounds
When checking for a supported IRQ number, the following test is used:
/ IRQs 2,3,5,6,7, 10,11,15 are valid for "enhanced" mode / if ((1 << it->options[1]) & 0x8cec) {
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. Valid it->options[1] values that select the IRQ will be in the range [1,15]. The value 0 explicitly disables the use of interrupts.
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 - Compensating control
In the Linux kernel comedi das6402 IRQ check, require it->options[1] to be within bounds before evaluating the bit shift; valid IRQ-selection values are 1 through 15, while 0 explicitly disables interrupts.
Event History
Frequently Asked Questions
What is the severity of CVE-2025-38482?
The severity of CVE-2025-38482 is classified as moderate due to the potential for out-of-bounds bit shifts affecting IRQ handling in the Linux kernel.
How do I fix CVE-2025-38482?
To fix CVE-2025-38482, users should update their Linux kernel to the patched version provided by their distribution.
What impact does CVE-2025-38482 have on systems?
CVE-2025-38482 may lead to instability or unexpected behavior in systems utilizing affected IRQ settings within the Linux kernel.
Who is affected by CVE-2025-38482?
All users of the Linux kernel that utilize the comedi das6402 interface with vulnerable IRQ handling may be affected by CVE-2025-38482.
Is CVE-2025-38482 being actively exploited?
As of now, there are no public reports indicating active exploitation of CVE-2025-38482 in the wild.