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CVE-2026-80645

HIGHCVSS 8.1/10EPSS 0.18%

Last modified

CVE-2026-80645 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.1/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

EPSS Probability
0.18%

7.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 48618fb4e522d9d02e217ac05f52749545c1af20, < 9e775c3199903d7c09a52530042b1198eab705bd; >= 48618fb4e522d9d02e217ac05f52749545c1af20, < 81c06ef66c3ab6eeaa72eb790c90ae043cdb3d43; >= 48618fb4e522d9d02e217ac05f52749545c1af20, < 13092966ba5d8fb214a4efeddc87f9ed0fd2f945; >= 48618fb4e522d9d02e217ac05f52749545c1af20, < acd54f42abbbd806464468838dbc04efd203d2be; >= 48618fb4e522d9d02e217ac05f52749545c1af20, < 3b5c66e922aa6a3331915a14520848a5b3beccc7; >= 48618fb4e522d9d02e217ac05f52749545c1af20, < 070f356ea4f419e4e85e4089381f4477f41d969e; >= 48618fb4e522d9d02e217ac05f52749545c1af20, < dc28a14f3e4546b2b06098d24177942540581a5f; >= 48618fb4e522d9d02e217ac05f52749545c1af20, < fc15e3a30ddd950f009c76765331783b9af94a87
LinuxLinux3.2

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-80645?
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.
How severe is CVE-2026-80645?
CVE-2026-80645 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-80645?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST