{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38405", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.012Z", "datePublished": "2025-07-25T13:12:07.926Z", "dateUpdated": "2026-08-05T12:01:38.515Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:01:38.515Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: fix memory leak of bio integrity\n\nIf nvmet receives commands with metadata there is a continuous memory\nleak of kmalloc-128 slab or more precisely bio->bi_integrity.\n\nSince commit bf4c89fc8797 (\"block: don't call bio_uninit from bio_endio\")\neach user of bio_init has to use bio_uninit as well. Otherwise the bio\nintegrity is not getting free. Nvmet uses bio_init for inline bios.\n\nUninit the inline bio to complete deallocation of integrity in bio." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The leak is driven entirely by NVMe commands received by the nvmet target from a remote host, and the affected metadata/PI path is only reachable via nvmet-rdma (the sole transport setting NVMF_METADATA_SUPPORTED), which runs over routable RoCEv2/iWARP fabrics. No local access to the target is needed.\nAC:L - Every read/write command carrying protection information leaks a bip allocation with 100% reliability — no race, no memory-layout dependency, and the attacker fully controls the I/O size that selects the vulnerable inline-bio path. Repetition to exhaust memory is unconstrained.\nPR:N - NVMe-oF requires no authentication by default; the target admits hosts based on a client-supplied, trivially spoofable host NQN or with allow_any_host enabled, so an unauthenticated remote peer can establish a queue and issue I/O.\nUI:N - The leak occurs purely from processing attacker-sent NVMe I/O commands; no action by any local user or administrator is required once the target is serving.\nS:U - The leaked kernel slab memory and its consequences are confined to the kernel of the target host; no security boundary such as a hypervisor or IOMMU domain is crossed.\nC:N - The orphaned bio_integrity_payload is never re-read or exposed, and no out-of-bounds or uninitialized data is returned to the attacker, so there is no information disclosure.\nI:N - bio_init() resets bi_integrity to NULL on reuse, so the leak causes no use-after-free, double-free, or any other memory corruption — no kernel data is modified.\nA:H - The leak is unbounded and driven at line-rate I/O speed by the remote attacker, so sustained traffic exhausts kernel slab memory leading to OOM kills, allocation failures and system hang/panic on the storage target." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/nvme/target/nvmet.h" ], "versions": [ { "version": "bf4c89fc8797f5c0964a0c3d561fbe7e8483b62f", "lessThan": "431e58d56fcb5ff1f9eb630724a922e0d2a941df", "status": "affected", "versionType": "git" }, { "version": "bf4c89fc8797f5c0964a0c3d561fbe7e8483b62f", "lessThan": "2e2028fcf924d1c6df017033c8d6e28b735a0508", "status": "affected", "versionType": "git" }, { "version": "bf4c89fc8797f5c0964a0c3d561fbe7e8483b62f", "lessThan": "190f4c2c863af7cc5bb354b70e0805f06419c038", "status": "affected", "versionType": "git" }, { "version": "64149da0fddbbfe43e11c0348d8c8b4171dae3a2", "status": "affected", "versionType": "git" }, { "version": "6.10.10", "lessThan": "6.11", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/nvme/target/nvmet.h" ], "versions": [ { "version": "6.11", "status": "affected" }, { "version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.37", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.6", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16", "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": "6.11", "versionEndExcluding": "6.12.37" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.15.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/431e58d56fcb5ff1f9eb630724a922e0d2a941df" }, { "url": "https://git.kernel.org/stable/c/2e2028fcf924d1c6df017033c8d6e28b735a0508" }, { "url": "https://git.kernel.org/stable/c/190f4c2c863af7cc5bb354b70e0805f06419c038" } ], "title": "nvmet: fix memory leak of bio integrity", "x_generator": { "engine": "bippy-1.2.0" } } } }