CVE-2026-23298
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…
Does this matter?
Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/13b646eec3ba1131180803f5aaf1fee23540ad8fPatch
- https://git.kernel.org/stable/c/1e446fd0582ad8be9f6dafb115fc2e7245f9bea7Patch
- https://git.kernel.org/stable/c/aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588Patch
- https://git.kernel.org/stable/c/ab6f075492d37368b4c7b0df7f7fdc2b666887fcPatch
- https://git.kernel.org/stable/c/bd85f21a6219aeae4389d700c54f1799f4b814e0Patch
- https://git.kernel.org/stable/c/c7bc62be6c1a60bb21301692009590b1ffda91d9Patch
- https://git.kernel.org/stable/c/ca07d3c6eef14d34e6fdeefe55058db045be29dcPatch
- https://git.kernel.org/stable/c/e7bb6e0606b5f233531aaaad9542d69fbb792115Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.