{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72107", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.906Z", "datePublished": "2026-08-15T05:52:49.581Z", "dateUpdated": "2026-08-17T05:40:20.098Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:40:20.098Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm era: fix out-of-bounds memory access for non-zero start sector\n\ndm-era tracks writes in target-relative blocks, but era_map() calculates\nthe writeset block before applying the target offset. Tables with a\nnon-zero start sector can therefore pass an absolute mapped-device block\nto metadata_current_marked().\n\nIf the absolute block is beyond the current writeset size,\nwriteset_marked() tests past the end of the in-core bitset. KASAN reports\nthis as a vmalloc-out-of-bounds access.\n\nApply the target offset before calculating the era block so writeset\nlookups use the target-relative block number."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - The bug is hit in era_map() on write bios submitted to a dm-era device; on storage servers that expose dm-era-backed LUNs via iSCSI or NVMe-oF, a remote initiator's SCSI/NVMe writes traverse the network stack into dm_submit_bio() and reach the flawed writeset lookup without local shell access.\nAC:L - Once a dm-era table uses a non-zero start sector (common when mapping a partition offset), any single write I/O deterministically passes an out-of-range block index to writeset_marked()/test_bit(); no race, special heap layout, or victim state beyond that configuration is required.\nPR:L - Exploitation requires only write access to the dm-era-backed block device (filesystem, raw /dev/dm-* node, or authenticated iSCSI/NVMe-oF initiator credentials); loading the dm table needs CAP_SYS_ADMIN, but triggering the OOB read does not\u2014unprivileged local users or remote storage clients with write permission suffice.\nUI:N - Triggering the flaw requires only the attacker's own write I/O to the dm-era volume; no victim must mount a filesystem, open a file, click a link, or perform any separate interactive action beyond routine storage writes.\nS:U - The vmalloc out-of-bounds read and any resulting kernel oops or privilege escalation occur entirely within the host kernel's device-mapper/storage subsystem on the same machine; this is not a VM escape, IOMMU bypass, or other cross-security-authority boundary violation.\nC:H - writeset_marked() calls test_bit() with an attacker-influenced block index derived from the write offset; when the absolute block exceeds the writeset size this is a vmalloc out-of-bounds read that can disclose adjacent kernel heap memory, matching CNA guidance for OOB reads.\nI:H - Kernel vmalloc out-of-bounds access via test_bit() is memory corruption in a privileged context; disclosed adjacent heap contents can be used to craft follow-on arbitrary-write or control-flow hijack primitives, so integrity impact is rated High when uncertain between Low and High.\nA:H - KASAN reports this as vmalloc-out-of-bounds, and reading past the vzalloc'd bitset can fault on unmapped pages or provoke a kernel oops/panic, causing immediate denial of service on storage nodes processing writes through dm-era."}]}], "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": "fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "7e1822f83c5a1ee7b4a19e98edde8770a10b4c71", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "db5f9b4601f0012038e5a2628aedec2f47933380", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "1fcb5e29dd7a5b85adb9d8b539911741d878e829", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6", "status": "affected", "versionType": "git"}, {"version": "eec40579d84873dfb7021eb24c50360f073237c5", "lessThan": "a868196f03c2b19418ae3d2b69e195d668a271e5", "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": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf"}, {"url": "https://git.kernel.org/stable/c/e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5"}, {"url": "https://git.kernel.org/stable/c/9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f"}, {"url": "https://git.kernel.org/stable/c/7e1822f83c5a1ee7b4a19e98edde8770a10b4c71"}, {"url": "https://git.kernel.org/stable/c/db5f9b4601f0012038e5a2628aedec2f47933380"}, {"url": "https://git.kernel.org/stable/c/1fcb5e29dd7a5b85adb9d8b539911741d878e829"}, {"url": "https://git.kernel.org/stable/c/bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6"}, {"url": "https://git.kernel.org/stable/c/a868196f03c2b19418ae3d2b69e195d668a271e5"}], "title": "dm era: fix out-of-bounds memory access for non-zero start sector", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"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": "fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf", "status": "affected", "version": "eec40579d84873dfb7021eb24c50360f073237c5", "versionType": "git"}, {"lessThan": "e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5", "status": "affected", "version": "eec40579d84873dfb7021eb24c50360f073237c5", "versionType": "git"}, {"lessThan": "9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f", "status": "affected", "version": "eec40579d84873dfb7021eb24c50360f073237c5", "versionType": "git"}, {"lessThan": "7e1822f83c5a1ee7b4a19e98edde8770a10b4c71", "status": "affected", "version": "eec40579d84873dfb7021eb24c50360f073237c5", "versionType": "git"}, {"lessThan": "db5f9b4601f0012038e5a2628aedec2f47933380", "status": "affected", "version": "eec40579d84873dfb7021eb24c50360f073237c5", "versionType": "git"}, {"lessThan": "1fcb5e29dd7a5b85adb9d8b539911741d878e829", "status": "affected", "version": "eec40579d84873dfb7021eb24c50360f073237c5", "versionType": "git"}, {"lessThan": "bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6", "status": "affected", "version": "eec40579d84873dfb7021eb24c50360f073237c5", "versionType": "git"}, {"lessThan": "a868196f03c2b19418ae3d2b69e195d668a271e5", "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": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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 out-of-bounds memory access for non-zero start sector\n\ndm-era tracks writes in target-relative blocks, but era_map() calculates\nthe writeset block before applying the target offset. Tables with a\nnon-zero start sector can therefore pass an absolute mapped-device block\nto metadata_current_marked().\n\nIf the absolute block is beyond the current writeset size,\nwriteset_marked() tests past the end of the in-core bitset. KASAN reports\nthis as a vmalloc-out-of-bounds access.\n\nApply the target offset before calculating the era block so writeset\nlookups use the target-relative block number."}], "id": "CVE-2026-72107", "lastModified": "2026-08-17T06:18:09.717", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:21:24.920", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1fcb5e29dd7a5b85adb9d8b539911741d878e829"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7e1822f83c5a1ee7b4a19e98edde8770a10b4c71"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a868196f03c2b19418ae3d2b69e195d668a271e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/db5f9b4601f0012038e5a2628aedec2f47933380"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: dm era: fix out-of-bounds memory access for non-zero start sector", "id": "2516419", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516419"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's device-mapper (dm-era) component. This vulnerability arises from an incorrect calculation of writeset blocks, which can lead to an out-of-bounds memory access. An attacker could potentially exploit this to cause a denial of service or other undefined behavior due to memory corruption."], "name": "CVE-2026-72107", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72107\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72107\nhttps://lore.kernel.org/linux-cve-announce/2026081526-CVE-2026-72107-0676@gregkh/T"], "threat_severity": "Moderate"}

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