CVE-2026-80645

Summary

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

rapidio/tsi721: prevent a bad dereference in tsi721_db_dpc()

With a list_for_each() loop, if we don't find the item we are looking for in the list, then the loop exits with the iterator, which is "dbell" in this loop, pointing to invalid memory.

This code uses the "found" variable to determine if we have found the doorbell we are looking for or not. However, the problem that the "found" variable needs to be set to false at the start of each iteration, otherwise after the first correct doorbell, then everything is marked as found.

Reset the "found" to false at the start of the iteration and move the variable inside the loop.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux48618fb4e522d9d02e217ac05f52749545c1af20 < 9e775c3199903d7c09a52530042b1198eab705bdaffected
LinuxLinux48618fb4e522d9d02e217ac05f52749545c1af20 < 81c06ef66c3ab6eeaa72eb790c90ae043cdb3d43affected
LinuxLinux48618fb4e522d9d02e217ac05f52749545c1af20 < 13092966ba5d8fb214a4efeddc87f9ed0fd2f945affected
LinuxLinux48618fb4e522d9d02e217ac05f52749545c1af20 < acd54f42abbbd806464468838dbc04efd203d2beaffected
LinuxLinux48618fb4e522d9d02e217ac05f52749545c1af20 < 3b5c66e922aa6a3331915a14520848a5b3beccc7affected
LinuxLinux48618fb4e522d9d02e217ac05f52749545c1af20 < 070f356ea4f419e4e85e4089381f4477f41d969eaffected
LinuxLinux48618fb4e522d9d02e217ac05f52749545c1af20 < dc28a14f3e4546b2b06098d24177942540581a5faffected
LinuxLinux48618fb4e522d9d02e217ac05f52749545c1af20 < fc15e3a30ddd950f009c76765331783b9af94a87affected
LinuxLinux3.2affected
LinuxLinux0 < 3.2unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References