{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40285", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.184Z", "datePublished": "2025-12-06T21:51:09.590Z", "dateUpdated": "2026-05-11T21:46:23.709Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:46:23.709Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/server: fix possible refcount leak in smb2_sess_setup()\n\nReference count of ksmbd_session will leak when session need reconnect.\nFix this by adding the missing ksmbd_user_session_put()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/server/smb2pdu.c"], "versions": [{"version": "37a0e2b362b3150317fb6e2139de67b1e29ae5ff", "lessThan": "6fc935f798d44a8eb8a5e6659198399fbf57b981", "status": "affected", "versionType": "git"}, {"version": "450a844c045ff0895d41b05a1cbe8febd1acfcfd", "lessThan": "e671f9bb97805771380c98de944e2ceab6949188", "status": "affected", "versionType": "git"}, {"version": "a39e31e22a535d47b14656a7d6a893c7f6cf758c", "lessThan": "dcc51dfe6ff26b52cac106865a172ac982d78401", "status": "affected", "versionType": "git"}, {"version": "b95629435b84b9ecc0c765995204a4d8a913ed52", "lessThan": "d37b2c81c83d6c0d5ca582f4fe73c672983f9e0d", "status": "affected", "versionType": "git"}, {"version": "b95629435b84b9ecc0c765995204a4d8a913ed52", "lessThan": "379510a815cb2e64eb0a379cb62295d6ade65df0", "status": "affected", "versionType": "git"}, {"version": "2107ab40629aeabbec369cf34b8cf0f288c3eb1b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/server/smb2pdu.c"], "versions": [{"version": "6.13", "status": "affected"}, {"version": "0", "lessThan": "6.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.159", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.117", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.59", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.9", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "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": "6.1.121", "versionEndExcluding": "6.1.159"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.67", "versionEndExcluding": "6.6.117"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.6", "versionEndExcluding": "6.12.59"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.17.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.176"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6fc935f798d44a8eb8a5e6659198399fbf57b981"}, {"url": "https://git.kernel.org/stable/c/e671f9bb97805771380c98de944e2ceab6949188"}, {"url": "https://git.kernel.org/stable/c/dcc51dfe6ff26b52cac106865a172ac982d78401"}, {"url": "https://git.kernel.org/stable/c/d37b2c81c83d6c0d5ca582f4fe73c672983f9e0d"}, {"url": "https://git.kernel.org/stable/c/379510a815cb2e64eb0a379cb62295d6ade65df0"}], "title": "smb/server: fix possible refcount leak in smb2_sess_setup()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/server: fix possible refcount leak in smb2_sess_setup()\n\nReference count of ksmbd_session will leak when session need reconnect.\nFix this by adding the missing ksmbd_user_session_put()."}], "id": "CVE-2025-40285", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2025-12-06T22:15:56.667", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/379510a815cb2e64eb0a379cb62295d6ade65df0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6fc935f798d44a8eb8a5e6659198399fbf57b981"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d37b2c81c83d6c0d5ca582f4fe73c672983f9e0d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dcc51dfe6ff26b52cac106865a172ac982d78401"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e671f9bb97805771380c98de944e2ceab6949188"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: smb/server: fix possible refcount leak in smb2_sess_setup()", "id": "2419955", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2419955"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsmb/server: fix possible refcount leak in smb2_sess_setup()\nReference count of ksmbd_session will leak when session need reconnect.\nFix this by adding the missing ksmbd_user_session_put()."], "name": "CVE-2025-40285", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40285\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40285\nhttps://lore.kernel.org/linux-cve-announce/2025120718-CVE-2025-40285-9158@gregkh/T"], "threat_severity": "Moderate"}

{}