CVE-2026-98593 PUBLISHED

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

Assigner: Linux
Reserved: 25.09.2026 Published: 18.10.2026 Updated: 18.10.2026

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

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

When debug_register_static() fails, it clears areas, active_pages and active_entries but leaves the area bounds unchanged. Copying such an area, either by opening its view file or via debug_dump(), makes debug_info_copy() dereference the NULL pointers.

Skip the copy loop when the source has no areas.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from d72541f945127b4873dace501406a1bc8cd8e1e9 to 13decd3b3b3a4d8a2e603fb8c9ffde0c6be3c225 (excl.)
  • affected from d72541f945127b4873dace501406a1bc8cd8e1e9 to a19bede30f0da5ae56782edac62b5998a7434cba (excl.)
  • affected from d72541f945127b4873dace501406a1bc8cd8e1e9 to 33f706884821da9cb55b650b7b1d4f2bdf800137 (excl.)
  • affected from d72541f945127b4873dace501406a1bc8cd8e1e9 to 2de9c458cc49d8db6408a7c5fbf0c7c94fe4d52b (excl.)
  • affected from d72541f945127b4873dace501406a1bc8cd8e1e9 to 9c6af88fbefbe77608b77409df23a1617e28398c (excl.)
  • affected from d72541f945127b4873dace501406a1bc8cd8e1e9 to c593f38e1cdb92f87d01be4c4e5ac12417b1454b (excl.)
  • affected from d72541f945127b4873dace501406a1bc8cd8e1e9 to 012bfcd5a51082d5a65f096dfb9ca652b5267965 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.15 is affected
  • unaffected from 0 to 5.15 (excl.)
  • unaffected from 5.15.222 to 5.15.* (incl.)
  • unaffected from 6.1.189 to 6.1.* (incl.)
  • unaffected from 6.6.158 to 6.6.* (incl.)
  • unaffected from 6.12.112 to 6.12.* (incl.)
  • unaffected from 6.18.55 to 6.18.* (incl.)
  • unaffected from 7.2.9 to 7.2.* (incl.)
  • unaffected from 7.3-rc5 to * (incl.)

References