CVE-2025-39694

Summary

In the Linux kernel, the following vulnerability has been resolved:

s390/sclp: Fix SCCB present check

Tracing code called by the SCLP interrupt handler contains early exits if the SCCB address associated with an interrupt is NULL. This check is performed after physical to virtual address translation.

If the kernel identity mapping does not start at address zero, the resulting virtual address is never zero, so that the NULL checks won't work. Subsequently this may result in incorrect accesses to the first page of the identity mapping.

Fix this by introducing a function that handles the NULL case before address translation.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxada1da31ce34248bc97ca8f801f2cf6efa378a81 < aa5073ac1a2a274812f3b04c278992e68ff67cc7affected
LinuxLinuxada1da31ce34248bc97ca8f801f2cf6efa378a81 < 86c2825791c3836a8f77a954b9c5ebe6fab410c5affected
LinuxLinuxada1da31ce34248bc97ca8f801f2cf6efa378a81 < 61605c847599fbfdfafe638607841c7d73719081affected
LinuxLinuxada1da31ce34248bc97ca8f801f2cf6efa378a81 < bf83ae3537359af088d6577812ed93113dfbcb7baffected
LinuxLinuxada1da31ce34248bc97ca8f801f2cf6efa378a81 < 430fa71027b6ac9bb0ce5532b8d0676777d4219aaffected
LinuxLinux5.16affected
LinuxLinux0 < 5.16unaffected
LinuxLinux6.1.149 <= 6.1.*unaffected
LinuxLinux6.6.103 <= 6.6.*unaffected
LinuxLinux6.12.44 <= 6.12.*unaffected
LinuxLinux6.16.4 <= 6.16.*unaffected
LinuxLinux6.17 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

Additional References

References