CVE-2026-23298
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 6.1.170-1 |
| debian | bullseye | fixed | 6.1.170-1~deb11u1 |
| debian | forky | fixed | 6.19.8-1 |
| debian | sid | fixed | 6.19.8-1 |
| debian | trixie | fixed | 6.12.85-1 |
| linux-kernel | affected | 5.10.253 | |
| linux-kernel | 7.0 | affected | |
References
- https://www.suse.com/security/cve/CVE-2026-23298.html
- https://security-tracker.debian.org/tracker/CVE-2026-23298
- https://git.kernel.org/stable/c/13b646eec3ba1131180803f5aaf1fee23540ad8f
- https://git.kernel.org/stable/c/1e446fd0582ad8be9f6dafb115fc2e7245f9bea7
- https://git.kernel.org/stable/c/aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588
- https://git.kernel.org/stable/c/ab6f075492d37368b4c7b0df7f7fdc2b666887fc
- https://git.kernel.org/stable/c/bd85f21a6219aeae4389d700c54f1799f4b814e0
- https://git.kernel.org/stable/c/c7bc62be6c1a60bb21301692009590b1ffda91d9
- https://git.kernel.org/stable/c/ca07d3c6eef14d34e6fdeefe55058db045be29dc
- https://git.kernel.org/stable/c/e7bb6e0606b5f233531aaaad9542d69fbb792115
CWEs
CWE-835
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.