CVE-2025-39685

Summary

In the Linux kernel, the following vulnerability has been resolved:

comedi: pcl726: Prevent invalid irq number

The reproducer passed in an irq number(0x80008000) that was too large, which triggered the oob.

Added an interrupt number check to prevent users from passing in an irq number that was too large.

If it->options[1] is 31, then 1 << it->options[1] is still invalid because it shifts a 1-bit into the sign bit (which is UB in C). Possible solutions include reducing the upper bound on the it->options[1] value to 30 or lower, or using 1U << it->options[1].

The old code would just not attempt to request the IRQ if the options[1] value were invalid. And it would still configure the device without interrupts even if the call to request_irq returned an error. So it would be better to combine this test with the test below.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxfff46207245cd9e39c05b638afaee2478e64914b < bab220b0bb5af652007e278e8e8357f952b0e1eaaffected
LinuxLinuxfff46207245cd9e39c05b638afaee2478e64914b < 5a33d07c94ba91306093e823112a7aa9727549f6affected
LinuxLinuxfff46207245cd9e39c05b638afaee2478e64914b < 0eb4ed2aa261dee228f1668dbfa6d87353e8162daffected
LinuxLinuxfff46207245cd9e39c05b638afaee2478e64914b < a3cfcd0c78c80ca7cd80372dc28f77d01be57bf6affected
LinuxLinuxfff46207245cd9e39c05b638afaee2478e64914b < d8992c9a01f81128f36acb7c5755530e21fcd059affected
LinuxLinuxfff46207245cd9e39c05b638afaee2478e64914b < 96cb948408b3adb69df7e451ba7da9d21f814d00affected
LinuxLinux3.13affected
LinuxLinux0 < 3.13unaffected
LinuxLinux5.15.190 <= 5.15.*unaffected
LinuxLinux6.1.149 <= 6.1.*unaffected
LinuxLinux6.6.103 <= 6.6.*unaffected
LinuxLinux6.12.44 <= 6.12.*unaffected
LinuxLinux6.16.4 <= 6.16.*unaffected
LinuxLinux6.17 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

Additional References

References