CVE-2025-68308 | THREATINT

Description

In the Linux kernel, the following vulnerability has been resolved: can: kvaser_usb: leaf: Fix potential infinite loop in command parsers The `kvaser_usb_leaf_wait_cmd()` and `kvaser_usb_leaf_read_bulk_callback` functions contain logic to zero-length commands. These commands are used to align data to the USB endpoint's wMaxPacketSize boundary. The driver attempts to skip these placeholders by aligning the buffer position `pos` to the next packet boundary using `round_up()` function. However, if zero-length command is found exactly on a packet boundary (i.e., `pos` is a multiple of wMaxPacketSize, including 0), `round_up` function will return the unchanged value of `pos`. This prevents `pos` to be increased, causing an infinite loop in the parsing logic. This patch fixes this in the function by using `pos + 1` instead. This ensures that even if `pos` is on a boundary, the calculation is based on `pos + 1`, forcing `round_up()` to always return the next aligned boundary.

PUBLISHED Reserved 2025-12-16 | Published 2025-12-16 | Updated 2025-12-16 | Assigner Linux

Product status

Default status

unaffected

7259124eac7d1b76b41c7a9cb2511a30556deebe (git) before 58343e0a4d43699f0e2f5b169384bbe4c0217add

affected

7259124eac7d1b76b41c7a9cb2511a30556deebe (git) before 69c7825df64e24dc15d31631a1fc9145324b1345

affected

7259124eac7d1b76b41c7a9cb2511a30556deebe (git) before 028e89c7e8b4346302e88df01cc50e0a1f05791a

affected

7259124eac7d1b76b41c7a9cb2511a30556deebe (git) before e9dd83a75a7274edef21682c823bf0b66d7b6b7f

affected

7259124eac7d1b76b41c7a9cb2511a30556deebe (git) before 0897cea266e39166a36111059ba147192b36592f

affected

7259124eac7d1b76b41c7a9cb2511a30556deebe (git) before bd8135a560cf6e64f0b98ed4daadf126a38f7f48

affected

7259124eac7d1b76b41c7a9cb2511a30556deebe (git) before 0c73772cd2b8cc108d5f5334de89ad648d89b9ec

affected

Default status

affected

4.19

affected

Any version before 4.19

unaffected

5.10.247 (semver)

unaffected

5.15.197 (semver)

unaffected

6.1.159 (semver)

unaffected

6.6.119 (semver)

unaffected

6.12.61 (semver)

unaffected

6.17.11 (semver)

unaffected

6.18 (original_commit_for_fix)

unaffected

References

git.kernel.org/...c/58343e0a4d43699f0e2f5b169384bbe4c0217add

git.kernel.org/...c/69c7825df64e24dc15d31631a1fc9145324b1345

git.kernel.org/...c/028e89c7e8b4346302e88df01cc50e0a1f05791a

git.kernel.org/...c/e9dd83a75a7274edef21682c823bf0b66d7b6b7f

git.kernel.org/...c/0897cea266e39166a36111059ba147192b36592f

git.kernel.org/...c/bd8135a560cf6e64f0b98ed4daadf126a38f7f48

git.kernel.org/...c/0c73772cd2b8cc108d5f5334de89ad648d89b9ec

cve.org (CVE-2025-68308)

nvd.nist.gov (CVE-2025-68308)

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