{"id":"CVE-2026-98593","title":"s390/debug: Fix NULL pointer dereference in debug_info_copy()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/debug: Fix NULL pointer dereference in debug_info_copy()\n\nWhen debug_register_static() fails, it clears areas, active_pages and\nactive_entries but leaves the area …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < 13decd3b3b3a4d8a2e603fb8c9ffde0c6be3c225","Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < a19bede30f0da5ae56782edac62b5998a7434cba","Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < 33f706884821da9cb55b650b7b1d4f2bdf800137","Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < 2de9c458cc49d8db6408a7c5fbf0c7c94fe4d52b","Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < 9c6af88fbefbe77608b77409df23a1617e28398c","Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < c593f38e1cdb92f87d01be4c4e5ac12417b1454b","Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < 012bfcd5a51082d5a65f096dfb9ca652b5267965","Linux 5.15"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:19:05.272Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98593","references":[{"url":"https://git.kernel.org/stable/c/13decd3b3b3a4d8a2e603fb8c9ffde0c6be3c225"},{"url":"https://git.kernel.org/stable/c/a19bede30f0da5ae56782edac62b5998a7434cba"},{"url":"https://git.kernel.org/stable/c/33f706884821da9cb55b650b7b1d4f2bdf800137"},{"url":"https://git.kernel.org/stable/c/2de9c458cc49d8db6408a7c5fbf0c7c94fe4d52b"},{"url":"https://git.kernel.org/stable/c/9c6af88fbefbe77608b77409df23a1617e28398c"},{"url":"https://git.kernel.org/stable/c/c593f38e1cdb92f87d01be4c4e5ac12417b1454b"},{"url":"https://git.kernel.org/stable/c/012bfcd5a51082d5a65f096dfb9ca652b5267965"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.248Z","slug":"CVE-2026-98593","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ns390/debug: Fix NULL pointer dereference in debug_info_copy()\n\nWhen debug_register_static() fails, it clears areas, active_pages and\nactive_entries but leaves the area bounds unchanged. Copying such an\narea, either by opening its view file or via debug_dump(), makes\ndebug_info_copy() dereference the NULL pointers.\n\nSkip the copy loop when the source has no areas.\n\n## Affected\n\n- `Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < 13decd3b3b3a4d8a2e603fb8c9ffde0c6be3c225`\n- `Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < a19bede30f0da5ae56782edac62b5998a7434cba`\n- `Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < 33f706884821da9cb55b650b7b1d4f2bdf800137`\n- `Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < 2de9c458cc49d8db6408a7c5fbf0c7c94fe4d52b`\n- `Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < 9c6af88fbefbe77608b77409df23a1617e28398c`\n- `Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < c593f38e1cdb92f87d01be4c4e5ac12417b1454b`\n- `Linux >= d72541f945127b4873dace501406a1bc8cd8e1e9 < 012bfcd5a51082d5a65f096dfb9ca652b5267965`\n- `Linux 5.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}