{"id":"CVE-2026-89924","summary":"KVM: s390: Fix old_data leak in guest debug error path","details":"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 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.","modified":"2026-09-17T03:47:26.069358637Z","published":"2026-09-16T10:32:17.442Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89924.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/124c81ee610e1fbdd93d4399f88d9e28ba97a941"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4048d0a252163084794be3e37995b872c5178913"},{"type":"WEB","url":"https://git.kernel.org/stable/c/46cb8a273e2f853f89a78b59dbdff8787b6e1c86"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5fbf319137735252eefa507193c9a619af5b7457"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aa9c8e8baf1e765fa65b93212522c636f25d846f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c85d402553987777cc4742751437ea5dcbf98a7b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f55e4d415d95342d5753e528e05a1e8623992c3f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89924.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89924"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"27291e2165b6de70c476b7b675308113edd69a60"},{"fixed":"124c81ee610e1fbdd93d4399f88d9e28ba97a941"},{"fixed":"e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4"},{"fixed":"c85d402553987777cc4742751437ea5dcbf98a7b"},{"fixed":"5fbf319137735252eefa507193c9a619af5b7457"},{"fixed":"4048d0a252163084794be3e37995b872c5178913"},{"fixed":"f55e4d415d95342d5753e528e05a1e8623992c3f"},{"fixed":"46cb8a273e2f853f89a78b59dbdff8787b6e1c86"},{"fixed":"aa9c8e8baf1e765fa65b93212522c636f25d846f"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89924.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.16.0"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89924.json"}}],"schema_version":"1.9.0"}