# CVE-2026-80645: linux: In the Linux kernel, the following vulnerability has been resolved:  rapidio/tsi721: prevent a bad dereference in tsi...

CVE-2026-80645 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-80645, released August 29, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-80645
- Priority: High
- CVSS: 8.1 (high)
- EPSS: 0.0040
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 28, 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.180-1 | [DEBIAN-CVE-2026-80645](https://patchblox.com/security/data/fix/linux/debian-cve-2026-80645.md) | Aug 29, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.100-1 | [DEBIAN-CVE-2026-80645](https://patchblox.com/security/data/fix/linux/debian-cve-2026-80645.md) | Aug 29, 2026 |
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-80645](https://patchblox.com/security/data/fix/linux/debian-cve-2026-80645.md) | Aug 29, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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