{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89574", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.727Z", "datePublished": "2026-09-11T19:44:42.494Z", "dateUpdated": "2026-09-11T19:44:42.494Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:44:42.494Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm array: validate array block headers on read\n\narray_block_check() validates blocknr and csum and nothing else, while\nnode_check(), next to it, has bounded the structural fields since both\nwere written. dm_array_cursor_next() takes its loop bound from the\non-disk nr_entries and element_at() is unguarded pointer arithmetic, so\na count larger than the block holds keeps the cursor in one block while\nthe index grows past it and the read walks off the dm-bufio buffer --\ndm_cache_load_mappings() drives it once per cache block at activation.\n\nCheck the header against itself: reject a zero value_size, require\nmax_entries to equal calc_max_entries() for that value_size and block\nsize, and require nr_entries to fit. Equality rather than an upper bound,\nsince a count below the real capacity trips BUG_ON() in fill_ablock() and\ntrim_ablock(). Metadata dm-array writes satisfies all three."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/persistent-data/dm-array.c"], "versions": [{"version": "6513c29f44f2cc970c0e9fecfe5a6526c3e73025", "lessThan": "67adda7ed5da3e3b64f5b9021a02c21fb374fd9c", "status": "affected", "versionType": "git"}, {"version": "6513c29f44f2cc970c0e9fecfe5a6526c3e73025", "lessThan": "b33f76d33aaeacf3baf3370d8d64985169b36600", "status": "affected", "versionType": "git"}, {"version": "6513c29f44f2cc970c0e9fecfe5a6526c3e73025", "lessThan": "9808ddffb4bc659352df3020cd84d9d864820ee5", "status": "affected", "versionType": "git"}, {"version": "6513c29f44f2cc970c0e9fecfe5a6526c3e73025", "lessThan": "2965787723084835b18dfe993cd450ebf5bd4540", "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/persistent-data/dm-array.c"], "versions": [{"version": "3.9", "status": "affected"}, {"version": "0", "lessThan": "3.9", "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-rc1", "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": "3.9", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/67adda7ed5da3e3b64f5b9021a02c21fb374fd9c"}, {"url": "https://git.kernel.org/stable/c/b33f76d33aaeacf3baf3370d8d64985169b36600"}, {"url": "https://git.kernel.org/stable/c/9808ddffb4bc659352df3020cd84d9d864820ee5"}, {"url": "https://git.kernel.org/stable/c/2965787723084835b18dfe993cd450ebf5bd4540"}], "title": "dm array: validate array block headers on read", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/md/persistent-data/dm-array.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "67adda7ed5da3e3b64f5b9021a02c21fb374fd9c", "status": "affected", "version": "6513c29f44f2cc970c0e9fecfe5a6526c3e73025", "versionType": "git"}, {"lessThan": "b33f76d33aaeacf3baf3370d8d64985169b36600", "status": "affected", "version": "6513c29f44f2cc970c0e9fecfe5a6526c3e73025", "versionType": "git"}, {"lessThan": "9808ddffb4bc659352df3020cd84d9d864820ee5", "status": "affected", "version": "6513c29f44f2cc970c0e9fecfe5a6526c3e73025", "versionType": "git"}, {"lessThan": "2965787723084835b18dfe993cd450ebf5bd4540", "status": "affected", "version": "6513c29f44f2cc970c0e9fecfe5a6526c3e73025", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/md/persistent-data/dm-array.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.9"}, {"lessThan": "3.9", "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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm array: validate array block headers on read\n\narray_block_check() validates blocknr and csum and nothing else, while\nnode_check(), next to it, has bounded the structural fields since both\nwere written. dm_array_cursor_next() takes its loop bound from the\non-disk nr_entries and element_at() is unguarded pointer arithmetic, so\na count larger than the block holds keeps the cursor in one block while\nthe index grows past it and the read walks off the dm-bufio buffer --\ndm_cache_load_mappings() drives it once per cache block at activation.\n\nCheck the header against itself: reject a zero value_size, require\nmax_entries to equal calc_max_entries() for that value_size and block\nsize, and require nr_entries to fit. Equality rather than an upper bound,\nsince a count below the real capacity trips BUG_ON() in fill_ablock() and\ntrim_ablock(). Metadata dm-array writes satisfies all three."}], "id": "CVE-2026-89574", "lastModified": "2026-09-11T20:19:41.517", "metrics": {}, "published": "2026-09-11T20:19:41.517", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2965787723084835b18dfe993cd450ebf5bd4540"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/67adda7ed5da3e3b64f5b9021a02c21fb374fd9c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9808ddffb4bc659352df3020cd84d9d864820ee5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b33f76d33aaeacf3baf3370d8d64985169b36600"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: dm array out-of-bounds read due to insufficient header validation", "id": "2532117", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532117"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's device mapper (dm) array component. Insufficient validation of array block headers during read operations allows a local attacker to craft a malicious on-disk `nr_entries` value. This can lead to an out-of-bounds read from the `dm-bufio` buffer, potentially resulting in memory corruption or information disclosure."], "name": "CVE-2026-89574", "public_date": "2026-09-11T19:44:42Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89574\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89574\nhttps://git.kernel.org/stable/c/2965787723084835b18dfe993cd450ebf5bd4540\nhttps://git.kernel.org/stable/c/67adda7ed5da3e3b64f5b9021a02c21fb374fd9c\nhttps://git.kernel.org/stable/c/9808ddffb4bc659352df3020cd84d9d864820ee5\nhttps://git.kernel.org/stable/c/b33f76d33aaeacf3baf3370d8d64985169b36600"], "threat_severity": "Moderate"}

{}