The vulnerability of the functions system_call() and mckk_int_handler() in the arch/s390/kernel/entry.S module of the Linux operating system allows a hacker to trigger a service failure.

The vulnerability of the functions systemcall and mcckinthandler in the arch/s390/kernel/entry.S module of the Linux operating system’s kernel is related to incorrect initialization of resources. Exploiting this vulnerability could allow an attacker to cause a service failure...

CVE-2026-31482

The CVE-2026-31482 issue affects the Linux kernel on s390, where r12 was not scrubbed on kernel entry due to an incomplete update in the s390 entry path. The root cause is that, after removing TIF_ISOLATE_BP, the register-clearing sequence failed to include the xgr %r12,%r12 scrub, leaving the cu...

CVE-2026-31482 s390/entry: Scrub r12 register on kernel entry

In the Linux kernel, the following vulnerability has been resolved: s390/entry: Scrub r12 register on kernel entry Before commit f33f2d4c7c80 "s390/bp: remove TIFISOLATEBP", all entry handlers loaded r12 with the current task pointer lg %r12,LCCURRENT for use by the BPENTER/BPEXIT macros. That...

CVE-2026-31482 s390/entry: Scrub r12 register on kernel entry

In the Linux kernel, the following vulnerability has been resolved: s390/entry: Scrub r12 register on kernel entry Before commit f33f2d4c7c80 "s390/bp: remove TIFISOLATEBP", all entry handlers loaded r12 with the current task pointer lg %r12,LCCURRENT for use by the BPENTER/BPEXIT macros. That...