CVE-2026-97980 PUBLISHED

s390/debug: Fix NULL pointer dereference in debug_set_level()

Assigner: Linux
Reserved: 25.09.2026 Published: 25.09.2026 Updated: 25.09.2026

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

s390/debug: Fix NULL pointer dereference in debug_set_level()

Commit a2cec6863709 ("s390/debug: Add s390dbf kernel parameter") incorrectly removed a null-id check from debug_set_level(), introducing a possible NULL pointer dereference for debug-API users that put debug_register() results unchecked into debug_set_level().

Fix this by moving the check from the internal _debug_set_level() variant back to the external debug_set_level() wrapper.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from a2cec6863709d6673a025acc066c962b85a75842 to 716e1cd3783806929407dbd596e6b1118971eb9e (excl.)
  • affected from a2cec6863709d6673a025acc066c962b85a75842 to b1eb31d533cdfcae1011ed53850d52f36afe5774 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 7.2 is affected
  • unaffected from 0 to 7.2 (excl.)
  • unaffected from 7.2.7 to 7.2.* (incl.)
  • unaffected from 7.3-rc3 to * (incl.)

References