{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40103", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.164Z", "datePublished": "2025-10-30T09:48:08.421Z", "dateUpdated": "2026-04-18T08:57:06.416Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-18T08:57:06.416Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix refcount leak for cifs_sb_tlink\n\nFix three refcount inconsistency issues related to `cifs_sb_tlink`.\n\nComments for `cifs_sb_tlink` state that `cifs_put_tlink()` needs to be\ncalled after successful calls to `cifs_sb_tlink()`. Three calls fail to\nupdate refcount accordingly, leading to possible resource leaks."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/inode.c", "fs/smb/client/smb2ops.c"], "versions": [{"version": "8ceb984379462f94bdebef3288d569c6e1f912ea", "lessThan": "d3c8ea197055c260119a13360e8202a27e53e1e4", "status": "affected", "versionType": "git"}, {"version": "8ceb984379462f94bdebef3288d569c6e1f912ea", "lessThan": "790282abe9d805f08618c1c24ea2529e7259b692", "status": "affected", "versionType": "git"}, {"version": "8ceb984379462f94bdebef3288d569c6e1f912ea", "lessThan": "d7dd034c14928306db1b46be277ae439b84dacf9", "status": "affected", "versionType": "git"}, {"version": "8ceb984379462f94bdebef3288d569c6e1f912ea", "lessThan": "e15605b68b490186da2ad8029c0351a9cfb0b9af", "status": "affected", "versionType": "git"}, {"version": "8ceb984379462f94bdebef3288d569c6e1f912ea", "lessThan": "896bb31e1416f582503db1350cf1bd10dc64e5a6", "status": "affected", "versionType": "git"}, {"version": "8ceb984379462f94bdebef3288d569c6e1f912ea", "lessThan": "c2b77f42205ef485a647f62082c442c1cd69d3fc", "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/client/inode.c", "fs/smb/client/smb2ops.c"], "versions": [{"version": "3.7", "status": "affected"}, {"version": "0", "lessThan": "3.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.158", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.114", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.55", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.5", "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": "3.7", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.1.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.6.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.12.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.17.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d3c8ea197055c260119a13360e8202a27e53e1e4"}, {"url": "https://git.kernel.org/stable/c/790282abe9d805f08618c1c24ea2529e7259b692"}, {"url": "https://git.kernel.org/stable/c/d7dd034c14928306db1b46be277ae439b84dacf9"}, {"url": "https://git.kernel.org/stable/c/e15605b68b490186da2ad8029c0351a9cfb0b9af"}, {"url": "https://git.kernel.org/stable/c/896bb31e1416f582503db1350cf1bd10dc64e5a6"}, {"url": "https://git.kernel.org/stable/c/c2b77f42205ef485a647f62082c442c1cd69d3fc"}], "title": "smb: client: Fix refcount leak for cifs_sb_tlink", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix refcount leak for cifs_sb_tlink\n\nFix three refcount inconsistency issues related to `cifs_sb_tlink`.\n\nComments for `cifs_sb_tlink` state that `cifs_put_tlink()` needs to be\ncalled after successful calls to `cifs_sb_tlink()`. Three calls fail to\nupdate refcount accordingly, leading to possible resource leaks."}], "id": "CVE-2025-40103", "lastModified": "2026-04-18T09:16:12.240", "metrics": {}, "published": "2025-10-30T10:15:34.693", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/790282abe9d805f08618c1c24ea2529e7259b692"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/896bb31e1416f582503db1350cf1bd10dc64e5a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c2b77f42205ef485a647f62082c442c1cd69d3fc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d3c8ea197055c260119a13360e8202a27e53e1e4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d7dd034c14928306db1b46be277ae439b84dacf9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e15605b68b490186da2ad8029c0351a9cfb0b9af"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: smb: client: Fix refcount leak for cifs_sb_tlink", "id": "2407350", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2407350"}, "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": ["No description is available for this CVE."], "name": "CVE-2025-40103", "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": "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": "2025-10-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40103\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40103\nhttps://lore.kernel.org/linux-cve-announce/2025103018-CVE-2025-40103-e5ae@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-10-30T14:37:17.237145+00:00", "updated": "2025-10-30T14:37:17.237171+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}