{"id":"CVE-2026-89924","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Fix old_data leak in guest debug error path\n\n__import_wp_info() allocates a per-watchpoint old_data buffer to back up\nthe original guest memory contents","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Fix old_data leak in guest debug error path\n\n__import_wp_info() allocates a per-watchpoint old_data buffer to back up\nthe original guest memory contents. If …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 27291e2165b6de70c476b7b675308113edd69a60 < 124c81ee610e1fbdd93d4399f88d9e28ba97a941","Linux >= 27291e2165b6de70c476b7b675308113edd69a60 < e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4","Linux >= 27291e2165b6de70c476b7b675308113edd69a60 < c85d402553987777cc4742751437ea5dcbf98a7b","Linux >= 27291e2165b6de70c476b7b675308113edd69a60 < 5fbf319137735252eefa507193c9a619af5b7457","Linux >= 27291e2165b6de70c476b7b675308113edd69a60 < 4048d0a252163084794be3e37995b872c5178913","Linux >= 27291e2165b6de70c476b7b675308113edd69a60 < f55e4d415d95342d5753e528e05a1e8623992c3f","Linux >= 27291e2165b6de70c476b7b675308113edd69a60 < 46cb8a273e2f853f89a78b59dbdff8787b6e1c86","Linux >= 27291e2165b6de70c476b7b675308113edd69a60 < aa9c8e8baf1e765fa65b93212522c636f25d846f","Linux 3.16"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T11:17:01.527","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89924","references":[{"url":"https://git.kernel.org/stable/c/124c81ee610e1fbdd93d4399f88d9e28ba97a941","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4048d0a252163084794be3e37995b872c5178913","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/46cb8a273e2f853f89a78b59dbdff8787b6e1c86","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5fbf319137735252eefa507193c9a619af5b7457","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/aa9c8e8baf1e765fa65b93212522c636f25d846f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c85d402553987777cc4742751437ea5dcbf98a7b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f55e4d415d95342d5753e528e05a1e8623992c3f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.971Z","epss":0.00211,"epssPercentile":0.11583,"slug":"CVE-2026-89924","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Fix old_data leak in guest debug error path\n\n__import_wp_info() allocates a per-watchpoint old_data buffer to back up\nthe original guest memory contents. If a later watchpoint of the same\nKVM_SET_GUEST_DEBUG request fails to import, kvm_s390_import_bp_data()\njumps to the error label, which frees the wp_info array but not the\nold_data buffers of the entries that were imported successfully. Up to\nMAX_BP_COUNT - 1 buffers of up to MAX_WP_SIZE bytes are leaked per failed\nrequest, and the request can be repeated.\n\nCreate error handling for cleaning up all created old_data memory\nareas.\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":[]}