CVE-2026-74365

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That recursion model stopped being valid after BTT\nlanes became preemptible: another task can run on the same CPU,\nobserve a non-zero recursion count, bypass locking, and use the same\nlane concurrently.\n\nBTT lanes are also held across arena_write_bytes() calls. That path\nreaches nsio_rw_bytes(), which flushes writes with nvdimm_flush().\nSome provider flush callbacks can sleep, making a spinlock the wrong\nprimitive for the lane lifetime.\n\nReplace the spinlock-based recursion model with a dynamically\nallocated per-lane mutex array and take the lane lock\nunconditionally.\n\nAdd might_sleep() to catch any future atomic-context caller.\n\nFound with the ndctl unit test btt-check.sh."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L", "baseScore": 7.3, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The flaw is reached only through local block I/O on a BTT-backed /dev/pmem* device via vfs_write/pwrite/O_DIRECT paths into btt_submit_bio->btt_write_pg/btt_read_pg->nd_region_acquire_lane; it is not in a network protocol handler.\nAC:L - After BTT lanes became preemptible, a second task on the same CPU can bypass the per-CPU recursion spinlock while the first still holds the lane across sleeping arena_write_bytes/nvdimm_flush; an attacker reliably wins by issuing concurrent writes (e.g., many threads) to the BTT block device.\nPR:L - No capability checks exist on the bio submission path; any local principal with write access to the BTT block device or a filesystem mounted on it (common for database/service accounts on PMEM servers) can trigger the race without real init-namespace root.\nUI:N - Exploitation requires only automated concurrent block writes from the attacker-controlled process and does not depend on any victim user opening files, clicking prompts, or performing other interactive actions.\nS:U - Impact is confined to corrupting BTT metadata and data within the attacker's reachable persistent-memory namespace on the same host; it does not cross VM, container, or IOMMU security boundaries to affect other security authorities.\nC:H - Unserialized lane use corrupts BTT map/log/freelist and in-memory arena->rtt/freelist state, so reads can return stale or mis-mapped sector contents (cross-LBA disclosure); the ndctl btt-check test observed data mismatches confirming readable integrity loss.\nI:H - Concurrent writers can silently corrupt on-media BTT translation tables and user data blocks, producing arbitrary persistent storage modification rather than a bounded or detectable single-field change, matching the fix commit's silent data-corruption description.\nA:L - The primary failure mode is silent corruption and subsequent I/O errors on the affected namespace rather than a kernel panic or hang, but corrupted BTT metadata can persistently degrade or deny reliable access to the volume until recovery or rebuild."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["Documentation/driver-api/nvdimm/btt.rst", "drivers/nvdimm/nd.h", "drivers/nvdimm/region_devs.c"], "versions": [{"version": "f23859748e3d530217b197e146a9ac84faf0a282", "lessThan": "fd7a97b2514cfc4b4cc067a27dd39bde2a8b1735", "status": "affected", "versionType": "git"}, {"version": "6f50b414f1a0d790f11a6438a3ad6d0577eb2c18", "lessThan": "73e35c1bdfa160b41fdbe204e02325f0687de506", "status": "affected", "versionType": "git"}, {"version": "36c75ce3bd299878fd9b238e9803d3817ddafbf3", "lessThan": "417918783bcfe0be135019df16a267b3af442efd", "status": "affected", "versionType": "git"}, {"version": "36c75ce3bd299878fd9b238e9803d3817ddafbf3", "lessThan": "5c53406098b599c420b031e6ec5ba8a2f3794c50", "status": "affected", "versionType": "git"}, {"version": "36c75ce3bd299878fd9b238e9803d3817ddafbf3", "lessThan": "4eafa810b042d985ec6bbf5b514414e73cee6f6f", "status": "affected", "versionType": "git"}, {"version": "36c75ce3bd299878fd9b238e9803d3817ddafbf3", "lessThan": "8d4b989d9c9afe5f185aa5853b666fc4617afe9e", "status": "affected", "versionType": "git"}, {"version": "2577fece583c7c05cda7ad50dde7638c962665e1", "status": "affected", "versionType": "git"}, {"version": "40ba3fa21250e361bdd8f00800b3e2cb6160de95", "status": "affected", "versionType": "git"}, {"version": "b0e7a935739f33ed2bd6868b89f97dd4c2683c26", "status": "affected", "versionType": "git"}, {"version": "66eb7b7f23dd9aec5356e7054dd3596ae7648ff5", "status": "affected", "versionType": "git"}, {"version": "b27751fb1f271bbb78d5993c0b10011628e40e18", "status": "affected", "versionType": "git"}, {"version": "6.1.63", "lessThan": "6.1.178", "status": "affected", "versionType": "semver"}, {"version": "6.6.2", "lessThan": "6.6.145", "status": "affected", "versionType": "semver"}, {"version": "4.19.299", "lessThan": "4.20", "status": "affected", "versionType": "semver"}, {"version": "5.4.261", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "5.10.201", "lessThan": "5.11", "status": "affected", "versionType": "semver"}, {"version": "5.15.139", "lessThan": "5.16", "status": "affected", "versionType": "semver"}, 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{"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": "6.1.63", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.2", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": 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"https://git.kernel.org/stable/c/5c53406098b599c420b031e6ec5ba8a2f3794c50"}, {"url": "https://git.kernel.org/stable/c/4eafa810b042d985ec6bbf5b514414e73cee6f6f"}, {"url": "https://git.kernel.org/stable/c/8d4b989d9c9afe5f185aa5853b666fc4617afe9e"}], "title": "nvdimm/btt: Handle preemption in BTT lane acquisition", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74365", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:54:37.742896Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:55:35.765Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74365", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:54:37.742896Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:54:38.655Z"}}], "cna": {"title": "nvdimm/btt: Handle preemption in BTT lane acquisition", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.3, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L"}, "scenarios": [{"lang": "en", "value": "AV:L - The flaw is reached only through local block I/O on a BTT-backed /dev/pmem* device via vfs_write/pwrite/O_DIRECT paths into btt_submit_bio->btt_write_pg/btt_read_pg->nd_region_acquire_lane; it is not in a network protocol handler.\nAC:L - After BTT lanes became preemptible, a second task on the same CPU can bypass the per-CPU recursion spinlock while the first still holds the lane across sleeping arena_write_bytes/nvdimm_flush; an attacker reliably wins by issuing concurrent writes (e.g., many threads) to the BTT block device.\nPR:L - No capability checks exist on the bio submission path; any local principal with write access to the BTT block device or a filesystem mounted on it (common for database/service accounts on PMEM servers) can trigger the race without real init-namespace root.\nUI:N - Exploitation requires only automated concurrent block writes from the attacker-controlled process and does not depend on any victim user opening files, clicking prompts, or performing other interactive actions.\nS:U - Impact is confined to corrupting BTT metadata and data within the attacker's reachable persistent-memory namespace on the same host; it does not cross VM, container, or IOMMU security boundaries to affect other security authorities.\nC:H - Unserialized lane use corrupts BTT map/log/freelist and in-memory arena->rtt/freelist state, so reads can return stale or mis-mapped sector contents (cross-LBA disclosure); the ndctl btt-check test observed data mismatches confirming readable integrity loss.\nI:H - Concurrent writers can silently corrupt on-media BTT translation tables and user data blocks, producing arbitrary persistent storage modification rather than a bounded or detectable single-field change, matching the fix commit's silent data-corruption description.\nA:L - The primary failure mode is silent corruption and subsequent I/O errors on the affected namespace rather than a kernel panic or hang, but corrupted BTT metadata can persistently degrade or deny reliable access to the volume until recovery or rebuild."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "f23859748e3d530217b197e146a9ac84faf0a282", "lessThan": "fd7a97b2514cfc4b4cc067a27dd39bde2a8b1735", "versionType": "git"}, {"status": "affected", "version": "6f50b414f1a0d790f11a6438a3ad6d0577eb2c18", "lessThan": "73e35c1bdfa160b41fdbe204e02325f0687de506", "versionType": "git"}, {"status": "affected", "version": "36c75ce3bd299878fd9b238e9803d3817ddafbf3", "lessThan": "417918783bcfe0be135019df16a267b3af442efd", "versionType": "git"}, {"status": "affected", "version": "36c75ce3bd299878fd9b238e9803d3817ddafbf3", "lessThan": "5c53406098b599c420b031e6ec5ba8a2f3794c50", "versionType": "git"}, {"status": "affected", "version": "36c75ce3bd299878fd9b238e9803d3817ddafbf3", "lessThan": "4eafa810b042d985ec6bbf5b514414e73cee6f6f", "versionType": "git"}, {"status": "affected", "version": "36c75ce3bd299878fd9b238e9803d3817ddafbf3", "lessThan": "8d4b989d9c9afe5f185aa5853b666fc4617afe9e", "versionType": "git"}, {"status": "affected", "version": "2577fece583c7c05cda7ad50dde7638c962665e1", "versionType": "git"}, {"status": "affected", "version": "40ba3fa21250e361bdd8f00800b3e2cb6160de95", "versionType": "git"}, {"status": "affected", "version": "b0e7a935739f33ed2bd6868b89f97dd4c2683c26", "versionType": "git"}, {"status": "affected", "version": "66eb7b7f23dd9aec5356e7054dd3596ae7648ff5", "versionType": "git"}, {"status": "affected", "version": "b27751fb1f271bbb78d5993c0b10011628e40e18", "versionType": "git"}, {"status": "affected", "version": "6.1.63", "lessThan": "6.1.178", "versionType": "semver"}, {"status": "affected", "version": "6.6.2", "lessThan": "6.6.145", "versionType": "semver"}, {"status": "affected", "version": "4.19.299", "lessThan": "4.20", "versionType": "semver"}, {"status": "affected", "version": "5.4.261", "lessThan": "5.5", "versionType": "semver"}, {"status": "affected", "version": "5.10.201", "lessThan": "5.11", "versionType": "semver"}, {"status": "affected", "version": "5.15.139", "lessThan": "5.16", "versionType": "semver"}, {"status": "affected", "version": "6.5.12", "lessThan": "6.6", "versionType": "semver"}], "programFiles": ["Documentation/driver-api/nvdimm/btt.rst", "drivers/nvdimm/nd.h", "drivers/nvdimm/region_devs.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.7"}, {"status": "unaffected", "version": "0", "lessThan": "6.7", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["Documentation/driver-api/nvdimm/btt.rst", "drivers/nvdimm/nd.h", "drivers/nvdimm/region_devs.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/fd7a97b2514cfc4b4cc067a27dd39bde2a8b1735"}, {"url": "https://git.kernel.org/stable/c/73e35c1bdfa160b41fdbe204e02325f0687de506"}, {"url": "https://git.kernel.org/stable/c/417918783bcfe0be135019df16a267b3af442efd"}, {"url": "https://git.kernel.org/stable/c/5c53406098b599c420b031e6ec5ba8a2f3794c50"}, {"url": "https://git.kernel.org/stable/c/4eafa810b042d985ec6bbf5b514414e73cee6f6f"}, {"url": "https://git.kernel.org/stable/c/8d4b989d9c9afe5f185aa5853b666fc4617afe9e"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvdimm/btt: Handle preemption in BTT lane acquisition\n\nBTT lanes serialize access to per-lane metadata and workspace state\nduring BTT I/O. The btt-check unit test reports data mismatches during\nBTT writes due to a race in lane acquisition that can lead to silent\ndata corruption.\n\nThe existing lane model uses a spinlock together with a per-CPU\nrecursion count. That recursion model stopped being valid after BTT\nlanes became preemptible: another task can run on the same CPU,\nobserve a non-zero recursion count, bypass locking, and use the same\nlane concurrently.\n\nBTT lanes are also held across arena_write_bytes() calls. That path\nreaches nsio_rw_bytes(), which flushes writes with nvdimm_flush().\nSome provider flush callbacks can sleep, making a spinlock the wrong\nprimitive for the lane lifetime.\n\nReplace the spinlock-based recursion model with a dynamically\nallocated per-lane mutex array and take the lane lock\nunconditionally.\n\nAdd might_sleep() to catch any future atomic-context caller.\n\nFound with the ndctl unit test btt-check.sh."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.178", "versionStartIncluding": "6.1.63"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "6.6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.97", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.19.299"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.4.261"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.10.201"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.15.139"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "6.5.12"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:46:24.251Z"}}}, "cveMetadata": {"cveId": "CVE-2026-74365", "state": "PUBLISHED", "dateUpdated": "2026-10-16T18:55:35.765Z", "dateReserved": "2026-08-15T05:44:03.888Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:58:47.594Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["Documentation/driver-api/nvdimm/btt.rst", "drivers/nvdimm/nd.h", "drivers/nvdimm/region_devs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "fd7a97b2514cfc4b4cc067a27dd39bde2a8b1735", "status": "affected", "version": "f23859748e3d530217b197e146a9ac84faf0a282", "versionType": "git"}, {"lessThan": "73e35c1bdfa160b41fdbe204e02325f0687de506", "status": "affected", "version": "6f50b414f1a0d790f11a6438a3ad6d0577eb2c18", "versionType": "git"}, {"lessThan": "417918783bcfe0be135019df16a267b3af442efd", "status": "affected", "version": "36c75ce3bd299878fd9b238e9803d3817ddafbf3", "versionType": "git"}, {"lessThan": "5c53406098b599c420b031e6ec5ba8a2f3794c50", "status": "affected", "version": "36c75ce3bd299878fd9b238e9803d3817ddafbf3", "versionType": "git"}, {"lessThan": "4eafa810b042d985ec6bbf5b514414e73cee6f6f", "status": "affected", "version": "36c75ce3bd299878fd9b238e9803d3817ddafbf3", "versionType": "git"}, {"lessThan": "8d4b989d9c9afe5f185aa5853b666fc4617afe9e", "status": "affected", "version": "36c75ce3bd299878fd9b238e9803d3817ddafbf3", "versionType": "git"}, {"status": "affected", "version": "2577fece583c7c05cda7ad50dde7638c962665e1", "versionType": "git"}, {"status": "affected", "version": "40ba3fa21250e361bdd8f00800b3e2cb6160de95", "versionType": "git"}, {"status": "affected", "version": "b0e7a935739f33ed2bd6868b89f97dd4c2683c26", "versionType": "git"}, {"status": "affected", "version": "66eb7b7f23dd9aec5356e7054dd3596ae7648ff5", "versionType": "git"}, {"status": "affected", "version": "b27751fb1f271bbb78d5993c0b10011628e40e18", "versionType": "git"}, {"lessThan": "6.1.178", "status": "affected", "version": "6.1.63", "versionType": "semver"}, {"lessThan": "6.6.145", "status": "affected", "version": "6.6.2", "versionType": "semver"}, {"lessThan": "4.20", "status": "affected", "version": "4.19.299", "versionType": "semver"}, {"lessThan": "5.5", "status": "affected", "version": "5.4.261", "versionType": "semver"}, {"lessThan": "5.11", "status": "affected", "version": "5.10.201", "versionType": "semver"}, {"lessThan": "5.16", "status": "affected", "version": "5.15.139", "versionType": "semver"}, {"lessThan": "6.6", "status": "affected", "version": "6.5.12", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["Documentation/driver-api/nvdimm/btt.rst", "drivers/nvdimm/nd.h", "drivers/nvdimm/region_devs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.7"}, {"lessThan": "6.7", "status": "unaffected", "version": "0", "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\nnvdimm/btt: Handle preemption in BTT lane acquisition\n\nBTT lanes serialize access to per-lane metadata and workspace state\nduring BTT I/O. The btt-check unit test reports data mismatches during\nBTT writes due to a race in lane acquisition that can lead to silent\ndata corruption.\n\nThe existing lane model uses a spinlock together with a per-CPU\nrecursion count. That recursion model stopped being valid after BTT\nlanes became preemptible: another task can run on the same CPU,\nobserve a non-zero recursion count, bypass locking, and use the same\nlane concurrently.\n\nBTT lanes are also held across arena_write_bytes() calls. That path\nreaches nsio_rw_bytes(), which flushes writes with nvdimm_flush().\nSome provider flush callbacks can sleep, making a spinlock the wrong\nprimitive for the lane lifetime.\n\nReplace the spinlock-based recursion model with a dynamically\nallocated per-lane mutex array and take the lane lock\nunconditionally.\n\nAdd might_sleep() to catch any future atomic-context caller.\n\nFound with the ndctl unit test btt-check.sh."}], "id": "CVE-2026-74365", "lastModified": "2026-10-16T19:17:42.100", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.5, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-74365", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T18:54:37.742896Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:22:38.143", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/417918783bcfe0be135019df16a267b3af442efd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4eafa810b042d985ec6bbf5b514414e73cee6f6f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5c53406098b599c420b031e6ec5ba8a2f3794c50"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/73e35c1bdfa160b41fdbe204e02325f0687de506"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8d4b989d9c9afe5f185aa5853b666fc4617afe9e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fd7a97b2514cfc4b4cc067a27dd39bde2a8b1735"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: nvdimm/btt: Handle preemption in BTT lane acquisition", "id": "2516849", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516849"}, "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-366", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnvdimm/btt: Handle preemption in BTT lane acquisition\nBTT lanes serialize access to per-lane metadata and workspace state\nduring BTT I/O. The btt-check unit test reports data mismatches during\nBTT writes due to a race in lane acquisition that can lead to silent\ndata corruption.\nThe existing lane model uses a spinlock together with a per-CPU\nrecursion count. That recursion model stopped being valid after BTT\nlanes became preemptible: another task can run on the same CPU,\nobserve a non-zero recursion count, bypass locking, and use the same\nlane concurrently.\nBTT lanes are also held across arena_write_bytes() calls. That path\nreaches nsio_rw_bytes(), which flushes writes with nvdimm_flush().\nSome provider flush callbacks can sleep, making a spinlock the wrong\nprimitive for the lane lifetime.\nReplace the spinlock-based recursion model with a dynamically\nallocated per-lane mutex array and take the lane lock\nunconditionally.\nAdd might_sleep() to catch any future atomic-context caller.\nFound with the ndctl unit test btt-check.sh.", "A flaw was found in the Linux kernel's NVDIMM Block Translation Table (BTT) subsystem. A race condition during BTT lane acquisition, caused by an invalid locking model, allows another task to bypass locking and concurrently use a BTT lane. This can lead to silent data corruption during BTT write operations."], "name": "CVE-2026-74365", "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": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "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-2026-74365\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74365\nhttps://lore.kernel.org/linux-cve-announce/2026081502-CVE-2026-74365-5870@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[f23859748e3d530217b197e146a9ac84faf0a282,fd7a97b2514cfc4b4cc067a27dd39bde2a8b1735)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[6f50b414f1a0d790f11a6438a3ad6d0577eb2c18,73e35c1bdfa160b41fdbe204e02325f0687de506)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[36c75ce3bd299878fd9b238e9803d3817ddafbf3,417918783bcfe0be135019df16a267b3af442efd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[36c75ce3bd299878fd9b238e9803d3817ddafbf3,5c53406098b599c420b031e6ec5ba8a2f3794c50)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[36c75ce3bd299878fd9b238e9803d3817ddafbf3,4eafa810b042d985ec6bbf5b514414e73cee6f6f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[36c75ce3bd299878fd9b238e9803d3817ddafbf3,8d4b989d9c9afe5f185aa5853b666fc4617afe9e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "2577fece583c7c05cda7ad50dde7638c962665e1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "40ba3fa21250e361bdd8f00800b3e2cb6160de95"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "b0e7a935739f33ed2bd6868b89f97dd4c2683c26"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "66eb7b7f23dd9aec5356e7054dd3596ae7648ff5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "b27751fb1f271bbb78d5993c0b10011628e40e18"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1.63,6.1.178)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.6.2,6.6.145)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.19.299,4.20)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.261,5.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.10.201,5.11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.15.139,5.16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.5.12,6.6)"}}], "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": "6.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-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": "2026-08-15T16:30:03.972841+00:00", "updated": "2026-08-22T01:30:17.268717+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}