{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72310", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.918Z", "datePublished": "2026-08-15T05:55:26.539Z", "dateUpdated": "2026-08-15T05:55:26.539Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-15T05:55:26.539Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix overflow in passthrough ioctl bounds check\n\nsmb2_ioctl_query_info() validates the PASSTHRU_FSCTL response payload\nbefore copying it to userspace.\n\nThe payload offset and length both come from 32-bit fields. The bounds\ncheck currently adds OutputOffset and qi.input_buffer_length directly, so\nthe addition can wrap in 32-bit arithmetic before the result is compared\nagainst the response buffer length.\n\nA malicious server can use a large OutputOffset and a small OutputCount\nto make the wrapped sum pass the bounds check. The later copy_to_user()\nthen reads from io_rsp + OutputOffset, outside the response buffer.\n\nUse size_add() for the offset plus length check so overflow is treated as\nout of bounds."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2ops.c"], "versions": [{"version": "2b1116bbe898aefdf584838448c6869f69851e0f", "lessThan": "175357ee0c596cb82054650dfa32fda51ad35aaa", "status": "affected", "versionType": "git"}, {"version": "2b1116bbe898aefdf584838448c6869f69851e0f", "lessThan": "dbd126539c098dba3159ce7d34b10b2daddcbd0f", "status": "affected", "versionType": "git"}, {"version": "2b1116bbe898aefdf584838448c6869f69851e0f", "lessThan": "63feb687e89a3a52a31e6e01764117cc500f1974", "status": "affected", "versionType": "git"}, {"version": "2b1116bbe898aefdf584838448c6869f69851e0f", "lessThan": "160045fc943f6c46b227644261252c8a22b8a87a", "status": "affected", "versionType": "git"}, {"version": "2b1116bbe898aefdf584838448c6869f69851e0f", "lessThan": "b30771b69eafae750afb7385fbcc3d77ed3f3670", "status": "affected", "versionType": "git"}, {"version": "2b1116bbe898aefdf584838448c6869f69851e0f", "lessThan": "1627e7d5c9b09721a141d07cedb178882f1ded67", "status": "affected", "versionType": "git"}, {"version": "2b1116bbe898aefdf584838448c6869f69851e0f", "lessThan": "1a638c55f2db6cb2296e5e3138015dd8fd9d4aa9", "status": "affected", "versionType": "git"}, {"version": "2b1116bbe898aefdf584838448c6869f69851e0f", "lessThan": "a4f27ad055392fa164f5649e89a3637b033c5fcc", "status": "affected", "versionType": "git"}, {"version": "2005c32ec99ee2490e8131b3953f3f212009ffea", "status": "affected", "versionType": "git"}, {"version": "5.4.69", "lessThan": "5.5", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2ops.c"], "versions": [{"version": "5.5", "status": "affected"}, {"version": "0", "lessThan": "5.5", "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-rc3", "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": "5.5", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.2-rc3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.69"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/175357ee0c596cb82054650dfa32fda51ad35aaa"}, {"url": "https://git.kernel.org/stable/c/dbd126539c098dba3159ce7d34b10b2daddcbd0f"}, {"url": "https://git.kernel.org/stable/c/63feb687e89a3a52a31e6e01764117cc500f1974"}, {"url": "https://git.kernel.org/stable/c/160045fc943f6c46b227644261252c8a22b8a87a"}, {"url": "https://git.kernel.org/stable/c/b30771b69eafae750afb7385fbcc3d77ed3f3670"}, {"url": "https://git.kernel.org/stable/c/1627e7d5c9b09721a141d07cedb178882f1ded67"}, {"url": "https://git.kernel.org/stable/c/1a638c55f2db6cb2296e5e3138015dd8fd9d4aa9"}, {"url": "https://git.kernel.org/stable/c/a4f27ad055392fa164f5649e89a3637b033c5fcc"}], "title": "smb: client: fix overflow in passthrough ioctl bounds check", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/smb2ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "175357ee0c596cb82054650dfa32fda51ad35aaa", "status": "affected", "version": "2b1116bbe898aefdf584838448c6869f69851e0f", "versionType": "git"}, {"lessThan": "dbd126539c098dba3159ce7d34b10b2daddcbd0f", "status": "affected", "version": "2b1116bbe898aefdf584838448c6869f69851e0f", "versionType": "git"}, {"lessThan": "63feb687e89a3a52a31e6e01764117cc500f1974", "status": "affected", "version": "2b1116bbe898aefdf584838448c6869f69851e0f", "versionType": "git"}, {"lessThan": "160045fc943f6c46b227644261252c8a22b8a87a", "status": "affected", "version": "2b1116bbe898aefdf584838448c6869f69851e0f", "versionType": "git"}, {"lessThan": "b30771b69eafae750afb7385fbcc3d77ed3f3670", "status": "affected", "version": "2b1116bbe898aefdf584838448c6869f69851e0f", "versionType": "git"}, {"lessThan": "1627e7d5c9b09721a141d07cedb178882f1ded67", "status": "affected", "version": "2b1116bbe898aefdf584838448c6869f69851e0f", "versionType": "git"}, {"lessThan": "1a638c55f2db6cb2296e5e3138015dd8fd9d4aa9", "status": "affected", "version": "2b1116bbe898aefdf584838448c6869f69851e0f", "versionType": "git"}, {"lessThan": "a4f27ad055392fa164f5649e89a3637b033c5fcc", "status": "affected", "version": "2b1116bbe898aefdf584838448c6869f69851e0f", "versionType": "git"}, {"status": "affected", "version": "2005c32ec99ee2490e8131b3953f3f212009ffea", "versionType": "git"}, {"lessThan": "5.5", "status": "affected", "version": "5.4.69", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/client/smb2ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.5"}, {"lessThan": "5.5", "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-rc3", "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\nsmb: client: fix overflow in passthrough ioctl bounds check\n\nsmb2_ioctl_query_info() validates the PASSTHRU_FSCTL response payload\nbefore copying it to userspace.\n\nThe payload offset and length both come from 32-bit fields. The bounds\ncheck currently adds OutputOffset and qi.input_buffer_length directly, so\nthe addition can wrap in 32-bit arithmetic before the result is compared\nagainst the response buffer length.\n\nA malicious server can use a large OutputOffset and a small OutputCount\nto make the wrapped sum pass the bounds check. The later copy_to_user()\nthen reads from io_rsp + OutputOffset, outside the response buffer.\n\nUse size_add() for the offset plus length check so overflow is treated as\nout of bounds."}], "id": "CVE-2026-72310", "lastModified": "2026-08-15T06:22:03.777", "metrics": {}, "published": "2026-08-15T06:22:03.777", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/160045fc943f6c46b227644261252c8a22b8a87a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1627e7d5c9b09721a141d07cedb178882f1ded67"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/175357ee0c596cb82054650dfa32fda51ad35aaa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1a638c55f2db6cb2296e5e3138015dd8fd9d4aa9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/63feb687e89a3a52a31e6e01764117cc500f1974"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a4f27ad055392fa164f5649e89a3637b033c5fcc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b30771b69eafae750afb7385fbcc3d77ed3f3670"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dbd126539c098dba3159ce7d34b10b2daddcbd0f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

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