{"api_version":"1","generated_at":"2026-07-24T21:08:30+00:00","cve":"CVE-2025-40103","urls":{"html":"https://cve.report/CVE-2025-40103","api":"https://cve.report/api/cve/CVE-2025-40103.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-40103","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-40103"},"summary":{"title":"smb: client: Fix refcount leak for cifs_sb_tlink","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2025-10-30 10:15:34","updated_at":"2026-04-18 09:16:12"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e15605b68b490186da2ad8029c0351a9cfb0b9af","name":"https://git.kernel.org/stable/c/e15605b68b490186da2ad8029c0351a9cfb0b9af","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/790282abe9d805f08618c1c24ea2529e7259b692","name":"https://git.kernel.org/stable/c/790282abe9d805f08618c1c24ea2529e7259b692","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/896bb31e1416f582503db1350cf1bd10dc64e5a6","name":"https://git.kernel.org/stable/c/896bb31e1416f582503db1350cf1bd10dc64e5a6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c2b77f42205ef485a647f62082c442c1cd69d3fc","name":"https://git.kernel.org/stable/c/c2b77f42205ef485a647f62082c442c1cd69d3fc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d7dd034c14928306db1b46be277ae439b84dacf9","name":"https://git.kernel.org/stable/c/d7dd034c14928306db1b46be277ae439b84dacf9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d3c8ea197055c260119a13360e8202a27e53e1e4","name":"https://git.kernel.org/stable/c/d3c8ea197055c260119a13360e8202a27e53e1e4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-40103","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40103","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8ceb984379462f94bdebef3288d569c6e1f912ea d3c8ea197055c260119a13360e8202a27e53e1e4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8ceb984379462f94bdebef3288d569c6e1f912ea 790282abe9d805f08618c1c24ea2529e7259b692 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8ceb984379462f94bdebef3288d569c6e1f912ea d7dd034c14928306db1b46be277ae439b84dacf9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8ceb984379462f94bdebef3288d569c6e1f912ea e15605b68b490186da2ad8029c0351a9cfb0b9af git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8ceb984379462f94bdebef3288d569c6e1f912ea 896bb31e1416f582503db1350cf1bd10dc64e5a6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8ceb984379462f94bdebef3288d569c6e1f912ea c2b77f42205ef485a647f62082c442c1cd69d3fc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.158 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.114 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.55 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17.5 6.17.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2025","cve_id":"40103","cve":"CVE-2025-40103","epss":"0.000760000","percentile":"0.227680000","score_date":"2026-04-21","updated_at":"2026-04-22 00:07:40"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/client/inode.c","fs/smb/client/smb2ops.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d3c8ea197055c260119a13360e8202a27e53e1e4","status":"affected","version":"8ceb984379462f94bdebef3288d569c6e1f912ea","versionType":"git"},{"lessThan":"790282abe9d805f08618c1c24ea2529e7259b692","status":"affected","version":"8ceb984379462f94bdebef3288d569c6e1f912ea","versionType":"git"},{"lessThan":"d7dd034c14928306db1b46be277ae439b84dacf9","status":"affected","version":"8ceb984379462f94bdebef3288d569c6e1f912ea","versionType":"git"},{"lessThan":"e15605b68b490186da2ad8029c0351a9cfb0b9af","status":"affected","version":"8ceb984379462f94bdebef3288d569c6e1f912ea","versionType":"git"},{"lessThan":"896bb31e1416f582503db1350cf1bd10dc64e5a6","status":"affected","version":"8ceb984379462f94bdebef3288d569c6e1f912ea","versionType":"git"},{"lessThan":"c2b77f42205ef485a647f62082c442c1cd69d3fc","status":"affected","version":"8ceb984379462f94bdebef3288d569c6e1f912ea","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/client/inode.c","fs/smb/client/smb2ops.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.7"},{"lessThan":"3.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.158","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.114","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.55","versionType":"semver"},{"lessThanOrEqual":"6.17.*","status":"unaffected","version":"6.17.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.18","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.158","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.114","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.55","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.17.5","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18","versionStartIncluding":"3.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-04-18T08:57:06.416Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2025-40103","datePublished":"2025-10-30T09:48:08.421Z","dateReserved":"2025-04-16T07:20:57.164Z","dateUpdated":"2026-04-18T08:57:06.416Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-10-30 10:15:34","lastModifiedDate":"2026-04-18 09:16:12","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"40103","Ordinal":"1","Title":"smb: client: Fix refcount leak for cifs_sb_tlink","CVE":"CVE-2025-40103","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"40103","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"smb: client: Fix refcount leak for cifs_sb_tlink"}]}}}