CVE-2026-23298
can: ucan: Fix infinite loop from zero-length messages
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
4.19
References 8
git.kernel.org
- stable/c/ca07d3c6eef14d34e6fdeefe55058db045be29dc
- stable/c/e7bb6e0606b5f233531aaaad9542d69fbb792115
- stable/c/ab6f075492d37368b4c7b0df7f7fdc2b666887fc
- stable/c/13b646eec3ba1131180803f5aaf1fee23540ad8f
- stable/c/bd85f21a6219aeae4389d700c54f1799f4b814e0
- stable/c/aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588
- stable/c/c7bc62be6c1a60bb21301692009590b1ffda91d9
- stable/c/1e446fd0582ad8be9f6dafb115fc2e7245f9bea7