{"id":"CVE-2026-99126","published":"2026-10-28T11:17:32.317","lastModified":"2026-10-28T11:17:32.317","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/ctcm: Prevent XID null dereference\n\nThe mpc_validate_xid() function sets grp->saved_xid2->xid2_flag2 to 0x40\nto signal XID validation error. If peer XID is NULL or r/w channel\npairing mismatch happens, grp->saved_xid2 is never initialized. An\nattempt to set the flag in such case leads to NULL dereference.\n\nFix this by using the always available priv->xid->xid2_flag2 instead of\ngrp->saved_xid2->xid2_flag2 for validation errors.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/34fa3607b7604b3052b19cec8b0ad644818cdd2a","tags":[]},{"url":"https://git.kernel.org/stable/c/8a2f7a4ad1d81612fa65bfa4d392ba1bb2f5eeab","tags":[]},{"url":"https://git.kernel.org/stable/c/b264d8422779d69febce914efc47a92a85cc382c","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}