{"id":"CVE-2026-23298","title":"can: ucan: Fix infinite loop from zero-length messages","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: ucan: Fix infinite loop from zero-length messages\n\nIf a broken ucan device gets a message with the message length field set\nto 0, then the driver will loop for for…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < ca07d3c6eef14d34e6fdeefe55058db045be29dc","Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < e7bb6e0606b5f233531aaaad9542d69fbb792115","Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < ab6f075492d37368b4c7b0df7f7fdc2b666887fc","Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < 13b646eec3ba1131180803f5aaf1fee23540ad8f","Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < bd85f21a6219aeae4389d700c54f1799f4b814e0","Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588","Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < c7bc62be6c1a60bb21301692009590b1ffda91d9","Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < 1e446fd0582ad8be9f6dafb115fc2e7245f9bea7","Linux 4.19"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:25:54.286760Z"},"published":"2026-03-25","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:33:36.600Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23298","references":[{"url":"https://git.kernel.org/stable/c/ca07d3c6eef14d34e6fdeefe55058db045be29dc"},{"url":"https://git.kernel.org/stable/c/e7bb6e0606b5f233531aaaad9542d69fbb792115"},{"url":"https://git.kernel.org/stable/c/ab6f075492d37368b4c7b0df7f7fdc2b666887fc"},{"url":"https://git.kernel.org/stable/c/13b646eec3ba1131180803f5aaf1fee23540ad8f"},{"url":"https://git.kernel.org/stable/c/bd85f21a6219aeae4389d700c54f1799f4b814e0"},{"url":"https://git.kernel.org/stable/c/aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588"},{"url":"https://git.kernel.org/stable/c/c7bc62be6c1a60bb21301692009590b1ffda91d9"},{"url":"https://git.kernel.org/stable/c/1e446fd0582ad8be9f6dafb115fc2e7245f9bea7"}],"tags":["cve.org"],"epss":0.00127,"epssPercentile":0.02419,"ingestedAt":"2026-11-05T22:38:32.111Z","slug":"CVE-2026-23298","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ncan: ucan: Fix infinite loop from zero-length messages\n\nIf a broken ucan device gets a message with the message length field set\nto 0, then the driver will loop for forever in\nucan_read_bulk_callback(), hanging the system.  If the length is 0, just\nskip the message and go on to the next one.\n\nThis has been fixed in the kvaser_usb driver in the past in commit\n0c73772cd2b8 (\"can: kvaser_usb: leaf: Fix potential infinite loop in\ncommand parsers\"), so there must be some broken devices out there like\nthis somewhere.\n\n## Affected\n\n- `Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < ca07d3c6eef14d34e6fdeefe55058db045be29dc`\n- `Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < e7bb6e0606b5f233531aaaad9542d69fbb792115`\n- `Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < ab6f075492d37368b4c7b0df7f7fdc2b666887fc`\n- `Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < 13b646eec3ba1131180803f5aaf1fee23540ad8f`\n- `Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < bd85f21a6219aeae4389d700c54f1799f4b814e0`\n- `Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588`\n- `Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < c7bc62be6c1a60bb21301692009590b1ffda91d9`\n- `Linux >= 9f2d3eae88d26c29d96e42983b755940d9169cd9 < 1e446fd0582ad8be9f6dafb115fc2e7245f9bea7`\n- `Linux 4.19`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}