CVE-2026-23298
can: ucan: Fix infinite loop from zero-length messages
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: can: ucan: Fix infinite loop from zero-length messages If a broken ucan device gets a message with the message length field set to 0, then the driver will loop for forever in ucan_read_bulk_callback(), hanging the system. If the length is 0, just skip the message and go on to the next one. This has been fixed in the kvaser_usb driver in the past in commit 0c73772cd2b8 ("can: kvaser_usb: leaf: Fix potential infinite loop in command parsers"), so there must be some broken devices out there like this somewhere.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Mar 25, 2026 |
| Last Updated | Apr 13, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new unknown vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Linux / Linux
9f2d3eae88d26c29d96e42983b755940d9169cd9 < ab6f075492d37368b4c7b0df7f7fdc2b666887fc 9f2d3eae88d26c29d96e42983b755940d9169cd9 < 13b646eec3ba1131180803f5aaf1fee23540ad8f 9f2d3eae88d26c29d96e42983b755940d9169cd9 < bd85f21a6219aeae4389d700c54f1799f4b814e0 9f2d3eae88d26c29d96e42983b755940d9169cd9 < aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588 9f2d3eae88d26c29d96e42983b755940d9169cd9 < c7bc62be6c1a60bb21301692009590b1ffda91d9 9f2d3eae88d26c29d96e42983b755940d9169cd9 < 1e446fd0582ad8be9f6dafb115fc2e7245f9bea7
Linux / Linux
4.19
References
git.kernel.org: https://git.kernel.org/stable/c/ab6f075492d37368b4c7b0df7f7fdc2b666887fc git.kernel.org: https://git.kernel.org/stable/c/13b646eec3ba1131180803f5aaf1fee23540ad8f git.kernel.org: https://git.kernel.org/stable/c/bd85f21a6219aeae4389d700c54f1799f4b814e0 git.kernel.org: https://git.kernel.org/stable/c/aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588 git.kernel.org: https://git.kernel.org/stable/c/c7bc62be6c1a60bb21301692009590b1ffda91d9 git.kernel.org: https://git.kernel.org/stable/c/1e446fd0582ad8be9f6dafb115fc2e7245f9bea7