{"id":"CVE-2026-98403","published":"2026-10-14T14:17:51.383","lastModified":"2026-10-14T14:17:51.383","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/boot: Avoid IPL parameter append past command line\n\nA command line may occupy all but the terminating byte of\nCOMMAND_LINE_SIZE. In that case append_ipl_block_parm() passes a zero size\nto the IPL parameter conversion helpers and points the destination one\nbyte past early_command_line. The helpers subtract one from the unsigned\nsize and write the converted parameter outside the command line buffer.\n\nConvert the IPL parameter in the command line parsing buffer first. A\nparameter beginning with '=' can then replace the existing command line\nregardless of its length, while other parameters are appended only when\nspace remains.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/73eec5a0d55916d7e1115f5d03a7ffc06d6215cf","tags":[]},{"url":"https://git.kernel.org/stable/c/8d11bfec8666f8409fac9072e9c25b691d3e30ac","tags":[]},{"url":"https://git.kernel.org/stable/c/af9866021a00ab9eeacf0c33ee73f3d134b4ed70","tags":[]},{"url":"https://git.kernel.org/stable/c/d76181dfabdaa720703167393704efacba343442","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}