{"id":"CVE-2025-68308","summary":"can: kvaser_usb: leaf: Fix potential infinite loop in command parsers","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: kvaser_usb: leaf: Fix potential infinite loop in command parsers\n\nThe `kvaser_usb_leaf_wait_cmd()` and `kvaser_usb_leaf_read_bulk_callback`\nfunctions contain logic to zero-length commands. These commands are used\nto align data to the USB endpoint's wMaxPacketSize boundary.\n\nThe driver attempts to skip these placeholders by aligning the buffer\nposition `pos` to the next packet boundary using `round_up()` function.\n\nHowever, if zero-length command is found exactly on a packet boundary\n(i.e., `pos` is a multiple of wMaxPacketSize, including 0), `round_up`\nfunction will return the unchanged value of `pos`. This prevents `pos`\nto be increased, causing an infinite loop in the parsing logic.\n\nThis patch fixes this in the function by using `pos + 1` instead.\nThis ensures that even if `pos` is on a boundary, the calculation is\nbased on `pos + 1`, forcing `round_up()` to always return the next\naligned boundary.","modified":"2026-04-16T04:30:58.594387233Z","published":"2025-12-16T15:06:25.081Z","related":["SUSE-SU-2026:0278-1","SUSE-SU-2026:0281-1","SUSE-SU-2026:0293-1","SUSE-SU-2026:0315-1","SUSE-SU-2026:20207-1","SUSE-SU-2026:20220-1","SUSE-SU-2026:20228-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","openSUSE-SU-2026:20145-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68308.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/028e89c7e8b4346302e88df01cc50e0a1f05791a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0897cea266e39166a36111059ba147192b36592f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0c73772cd2b8cc108d5f5334de89ad648d89b9ec"},{"type":"WEB","url":"https://git.kernel.org/stable/c/58343e0a4d43699f0e2f5b169384bbe4c0217add"},{"type":"WEB","url":"https://git.kernel.org/stable/c/69c7825df64e24dc15d31631a1fc9145324b1345"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bd8135a560cf6e64f0b98ed4daadf126a38f7f48"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e9dd83a75a7274edef21682c823bf0b66d7b6b7f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68308.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-68308"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7259124eac7d1b76b41c7a9cb2511a30556deebe"},{"fixed":"58343e0a4d43699f0e2f5b169384bbe4c0217add"},{"fixed":"69c7825df64e24dc15d31631a1fc9145324b1345"},{"fixed":"028e89c7e8b4346302e88df01cc50e0a1f05791a"},{"fixed":"e9dd83a75a7274edef21682c823bf0b66d7b6b7f"},{"fixed":"0897cea266e39166a36111059ba147192b36592f"},{"fixed":"bd8135a560cf6e64f0b98ed4daadf126a38f7f48"},{"fixed":"0c73772cd2b8cc108d5f5334de89ad648d89b9ec"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68308.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.19.0"},{"fixed":"5.10.247"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.197"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.159"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.119"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.61"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.17.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68308.json"}}],"schema_version":"1.7.5"}