CVE-2026-89576

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89576", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.727Z", "datePublished": "2026-09-11T19:44:43.777Z", "dateUpdated": "2026-10-19T08:49:09.363Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:49:09.363Z"}, "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()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/dm-era-target.c"], "versions": [{"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "54dd21ca945ecc07885012b9f3e8197f091cfba0", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "ef00efb6fcaee88f50891279ceced17c614e97f7", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "e9fa68b89214bc65af0ef963af7ec3cce9f866e0", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "dc731d7fddfd6149f5e88ea080475d18c36d3c64", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "d66ceeefb87ddb097b0546bafc581380b816b048", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "36ff918637e3517f732188a3c39dbeae5b9cfb1b", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "6876ca330e741fb8886d12070cb6a7f9cb67257e", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/dm-era-target.c"], "versions": [{"version": "3.15", "status": "affected"}, {"version": "0", "lessThan": "3.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/54dd21ca945ecc07885012b9f3e8197f091cfba0"}, {"url": "https://git.kernel.org/stable/c/ef00efb6fcaee88f50891279ceced17c614e97f7"}, {"url": "https://git.kernel.org/stable/c/e9fa68b89214bc65af0ef963af7ec3cce9f866e0"}, {"url": "https://git.kernel.org/stable/c/dc731d7fddfd6149f5e88ea080475d18c36d3c64"}, {"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"}}}}

{}

{"affected": [{"affectedData": [{"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": "54dd21ca945ecc07885012b9f3e8197f091cfba0", "status": "affected", "version": "eec40579d84873dfb7021eb24c50360f073237c5", "versionType": "git"}, {"lessThan": "ef00efb6fcaee88f50891279ceced17c614e97f7", "status": "affected", "version": "eec40579d84873dfb7021eb24c50360f073237c5", "versionType": "git"}, {"lessThan": "e9fa68b89214bc65af0ef963af7ec3cce9f866e0", "status": "affected", "version": "eec40579d84873dfb7021eb24c50360f073237c5", "versionType": "git"}, {"lessThan": "dc731d7fddfd6149f5e88ea080475d18c36d3c64", "status": "affected", "version": "eec40579d84873dfb7021eb24c50360f073237c5", "versionType": "git"}, {"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": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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()."}], "id": "CVE-2026-89576", "lastModified": "2026-10-19T09:17:53.620", "metrics": {}, "published": "2026-09-11T20:19:41.770", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/36ff918637e3517f732188a3c39dbeae5b9cfb1b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/54dd21ca945ecc07885012b9f3e8197f091cfba0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6876ca330e741fb8886d12070cb6a7f9cb67257e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d66ceeefb87ddb097b0546bafc581380b816b048"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dc731d7fddfd6149f5e88ea080475d18c36d3c64"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e9fa68b89214bc65af0ef963af7ec3cce9f866e0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ef00efb6fcaee88f50891279ceced17c614e97f7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel dm-era: Denial of Service due to metadata block leak", "id": "2532297", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532297"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-911", "details": ["A flaw was found in the Linux kernel's device-mapper era (dm-era) component. When a snapshot operation fails, a block of metadata is allocated but not properly freed. This leads to a permanent leak of system resources with each failed attempt. Over time, this resource exhaustion can result in a Denial of Service (DoS), causing the system to become unresponsive or crash."], "name": "CVE-2026-89576", "public_date": "2026-09-11T19:44:43Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89576\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89576\nhttps://git.kernel.org/stable/c/36ff918637e3517f732188a3c39dbeae5b9cfb1b\nhttps://git.kernel.org/stable/c/39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713\nhttps://git.kernel.org/stable/c/6876ca330e741fb8886d12070cb6a7f9cb67257e\nhttps://git.kernel.org/stable/c/d66ceeefb87ddb097b0546bafc581380b816b048"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eec40579d84873dfb7021eb24c50360f073237c5,d66ceeefb87ddb097b0546bafc581380b816b048)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eec40579d84873dfb7021eb24c50360f073237c5,36ff918637e3517f732188a3c39dbeae5b9cfb1b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eec40579d84873dfb7021eb24c50360f073237c5,6876ca330e741fb8886d12070cb6a7f9cb67257e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eec40579d84873dfb7021eb24c50360f073237c5,39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "3.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T09:30:13.018365+00:00", "updated": "2026-09-15T22:00:17.592584+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}