The vulnerability of the mpc_rcvd_sweep_req() function in the drivers/s390/net/ctcm_mpc.c module of the network driver for the S390 Linux operating system allows a hacker to cause a service failure.

The vulnerability of the mpcrcvdsweepreq function in the drivers/s390/net/ctcmmpc.c file of the S390 Linux operating system kernel driver is related to the repeated release of previously released memory. Exploiting this vulnerability could allow an attacker to cause a service failure...

CVE-2025-40253 s390/ctcm: Fix double-kfree

In the Linux kernel, the following vulnerability has been resolved: s390/ctcm: Fix double-kfree The function 'mpcrcvdsweepreqmpcginfo' is called conditionally from function 'ctcmpcunpackskb'. It frees passed mpcginfo. After that a call to function 'kfree' in function 'ctcmpcunpackskb' frees it...

CVE-2025-40253

The CVE-2025-40253 issue concerns the s390 Linux kernel driver ctcm_mpc.c, where mpc_rcvd_sweep_req(mpcginfo) freed memory that had already been freed by a subsequent kfree in ctcmpc_unpack_skb, causing a double-free scenario. The root cause is the conditional call path in ctcmpc_unpack_skb that ...