CVE-2026-80645

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

State: Published
Severity: 8.1 High
Published: Aug 28, 2026
Updated: Aug 29, 2026
Reserved: Aug 26, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	48618fb4e522d9d02e217ac05f52749545c1af20 to before 9e775c3199903d7c09a52530042b1198eab705bdAffected 48618fb4e522d9d02e217ac05f52749545c1af20 to before 81c06ef66c3ab6eeaa72eb790c90ae043cdb3d43Affected 48618fb4e522d9d02e217ac05f52749545c1af20 to before 13092966ba5d8fb214a4efeddc87f9ed0fd2f945Affected 48618fb4e522d9d02e217ac05f52749545c1af20 to before acd54f42abbbd806464468838dbc04efd203d2beAffected 48618fb4e522d9d02e217ac05f52749545c1af20 to before 3b5c66e922aa6a3331915a14520848a5b3beccc7Affected 48618fb4e522d9d02e217ac05f52749545c1af20 to before 070f356ea4f419e4e85e4089381f4477f41d969eAffected 48618fb4e522d9d02e217ac05f52749545c1af20 to before dc28a14f3e4546b2b06098d24177942540581a5fAffected 48618fb4e522d9d02e217ac05f52749545c1af20 to before fc15e3a30ddd950f009c76765331783b9af94a87Affected
LinuxLinux	3.2Affected before 3.2Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

48618fb4e522d9d02e217ac05f52749545c1af20 to before 9e775c3199903d7c09a52530042b1198eab705bdAffected
48618fb4e522d9d02e217ac05f52749545c1af20 to before 81c06ef66c3ab6eeaa72eb790c90ae043cdb3d43Affected
48618fb4e522d9d02e217ac05f52749545c1af20 to before 13092966ba5d8fb214a4efeddc87f9ed0fd2f945Affected
48618fb4e522d9d02e217ac05f52749545c1af20 to before acd54f42abbbd806464468838dbc04efd203d2beAffected
48618fb4e522d9d02e217ac05f52749545c1af20 to before 3b5c66e922aa6a3331915a14520848a5b3beccc7Affected
48618fb4e522d9d02e217ac05f52749545c1af20 to before 070f356ea4f419e4e85e4089381f4477f41d969eAffected
48618fb4e522d9d02e217ac05f52749545c1af20 to before dc28a14f3e4546b2b06098d24177942540581a5fAffected
48618fb4e522d9d02e217ac05f52749545c1af20 to before fc15e3a30ddd950f009c76765331783b9af94a87Affected

LinuxLinux

3.2Affected
before 3.2Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.5 through 7.1.*Not affected
7.2 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.