{"id":"CVE-2026-89576","summary":"dm-era: fix shadowed superblock leak on take-snap failure","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-era: fix shadowed superblock leak on take-snap failure\n\nmetadata_take_snap() bumps the live superblock refcount and then\ndm_tm_shadow_block() allocates a new block for the metadata snapshot.\nIf the subsequent dm_sm_inc_block() of writeset_tree_root or\nera_array_root fails, the function only unlocks the clone and\nreturns.  The newly allocated shadow block is never returned to the\nmetadata space map, so each failed take-snap permanently leaks one\nmetadata block.\n\nFree the clone with dm_sm_dec_block() on those error paths, matching\nthe final step of metadata_drop_snap().","modified":"2026-09-13T03:47:19.414036301Z","published":"2026-09-11T19:44:43.777Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89576.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/36ff918637e3517f732188a3c39dbeae5b9cfb1b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6876ca330e741fb8886d12070cb6a7f9cb67257e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d66ceeefb87ddb097b0546bafc581380b816b048"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89576.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89576"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"eec40579d84873dfb7021eb24c50360f073237c5"},{"fixed":"d66ceeefb87ddb097b0546bafc581380b816b048"},{"fixed":"36ff918637e3517f732188a3c39dbeae5b9cfb1b"},{"fixed":"6876ca330e741fb8886d12070cb6a7f9cb67257e"},{"fixed":"39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89576.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.15.0"},{"fixed":"6.12.109"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89576.json"}}],"schema_version":"1.9.0"}