{"api_version":"1","generated_at":"2026-09-12T12:32:03+00:00","cve":"CVE-2026-89576","urls":{"html":"https://cve.report/CVE-2026-89576","api":"https://cve.report/api/cve/CVE-2026-89576.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89576","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89576"},"summary":{"title":"dm-era: fix shadowed superblock leak on take-snap failure","description":"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().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:41","updated_at":"2026-09-11 20:19:41"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d66ceeefb87ddb097b0546bafc581380b816b048","name":"https://git.kernel.org/stable/c/d66ceeefb87ddb097b0546bafc581380b816b048","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6876ca330e741fb8886d12070cb6a7f9cb67257e","name":"https://git.kernel.org/stable/c/6876ca330e741fb8886d12070cb6a7f9cb67257e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/36ff918637e3517f732188a3c39dbeae5b9cfb1b","name":"https://git.kernel.org/stable/c/36ff918637e3517f732188a3c39dbeae5b9cfb1b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713","name":"https://git.kernel.org/stable/c/39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89576","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89576","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected eec40579d84873dfb7021eb24c50360f073237c5 d66ceeefb87ddb097b0546bafc581380b816b048 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected eec40579d84873dfb7021eb24c50360f073237c5 36ff918637e3517f732188a3c39dbeae5b9cfb1b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected eec40579d84873dfb7021eb24c50360f073237c5 6876ca330e741fb8886d12070cb6a7f9cb67257e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected eec40579d84873dfb7021eb24c50360f073237c5 39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/md/dm-era-target.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d66ceeefb87ddb097b0546bafc581380b816b048","status":"affected","version":"eec40579d84873dfb7021eb24c50360f073237c5","versionType":"git"},{"lessThan":"36ff918637e3517f732188a3c39dbeae5b9cfb1b","status":"affected","version":"eec40579d84873dfb7021eb24c50360f073237c5","versionType":"git"},{"lessThan":"6876ca330e741fb8886d12070cb6a7f9cb67257e","status":"affected","version":"eec40579d84873dfb7021eb24c50360f073237c5","versionType":"git"},{"lessThan":"39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713","status":"affected","version":"eec40579d84873dfb7021eb24c50360f073237c5","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/md/dm-era-target.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.15"},{"lessThan":"3.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.109","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.50","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"3.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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()."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:44:43.777Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d66ceeefb87ddb097b0546bafc581380b816b048"},{"url":"https://git.kernel.org/stable/c/36ff918637e3517f732188a3c39dbeae5b9cfb1b"},{"url":"https://git.kernel.org/stable/c/6876ca330e741fb8886d12070cb6a7f9cb67257e"},{"url":"https://git.kernel.org/stable/c/39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713"}],"title":"dm-era: fix shadowed superblock leak on take-snap failure","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89576","datePublished":"2026-09-11T19:44:43.777Z","dateReserved":"2026-09-11T19:38:34.727Z","dateUpdated":"2026-09-11T19:44:43.777Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:41","lastModifiedDate":"2026-09-11 20:19:41","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89576","Ordinal":"1","Title":"dm-era: fix shadowed superblock leak on take-snap failure","CVE":"CVE-2026-89576","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89576","Ordinal":"1","NoteData":"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().","Type":"Description","Title":"dm-era: fix shadowed superblock leak on take-snap failure"}]}}}