Answer in brief
CVE-2026-23298 records a Unknown severity vulnerability in can: ucan: Fix infinite loop from zero-length messages. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=9f2d3eae88d26c29d96e42983b755940d9169cd9 <ca07d3c6eef14d34e6fdeefe55058db045be29dc || >=9f2d3eae88d26c29d96e42983b755940d9169cd9 <e7bb6e0606b5f233531aaaad9542d69fbb792115 || >=9f2d3eae88d26c29d96e42983b755940d9169cd9 <ab6f075492d37368b4c7b0df7f7fdc2b666887fc || >=9f2d3eae88d26c29d96e42983b755940d9169cd9 <13b646eec3ba1131180803f5aaf1fee23540ad8f || >=9f2d3eae88d26c29d96e42983b755940d9169cd9 <bd85f21a6219aeae4389d700c54f1799f4b814e0 || >=9f2d3eae88d26c29d96e42983b755940d9169cd9 <aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588 || >=9f2d3eae88d26c29d96e42983b755940d9169cd9 <c7bc62be6c1a60bb21301692009590b1ffda91d9 || >=9f2d3eae88d26c29d96e42983b755940d9169cd9 <1e446fd0582ad8be9f6dafb115fc2e7245f9bea7 | ca07d3c6eef14d34e6fdeefe55058db045be29dc, e7bb6e0606b5f233531aaaad9542d69fbb792115, ab6f075492d37368b4c7b0df7f7fdc2b666887fc, 13b646eec3ba1131180803f5aaf1fee23540ad8f, bd85f21a6219aeae4389d700c54f1799f4b814e0, aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588, c7bc62be6c1a60bb21301692009590b1ffda91d9, 1e446fd0582ad8be9f6dafb115fc2e7245f9bea7 |
| Linux/Linuxgeneric | 4.19 | Not reported |
Published upstream
Mar 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.