{"api_version":"1","generated_at":"2026-08-25T03:18:20+00:00","cve":"CVE-2026-74608","urls":{"html":"https://cve.report/CVE-2026-74608","api":"https://cve.report/api/cve/CVE-2026-74608.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74608","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74608"},"summary":{"title":"smb: client: Fix use-after-free in cifs_try_adding_channels()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix use-after-free in cifs_try_adding_channels()\n\ncifs_try_adding_channels() takes a temporary reference to an interface\nbefore dropping iface_lock. If cifs_ses_add_channel() fails, it drops\nthat reference and then increments iface->weight_fulfilled.\n\nA concurrent interface list refresh can remove the list reference while\nchannel creation is in progress. In that case, the failure-path\nkref_put() releases the last reference and frees iface. Updating\nweight_fulfilled afterward then accesses freed memory.\n\nIncrement weight_fulfilled before dropping the temporary reference,\nkeeping iface alive for the final access.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:33","updated_at":"2026-08-22 16:16:33"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/64d7584e62ac8cdc750455c5fdc6008fc2de4f06","name":"https://git.kernel.org/stable/c/64d7584e62ac8cdc750455c5fdc6008fc2de4f06","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805","name":"https://git.kernel.org/stable/c/1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4986410316b1ae0e63c6ce418e4eb196723626e7","name":"https://git.kernel.org/stable/c/4986410316b1ae0e63c6ce418e4eb196723626e7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1ffacbadc14530e55b8d86f7b917524f6a0fb891","name":"https://git.kernel.org/stable/c/1ffacbadc14530e55b8d86f7b917524f6a0fb891","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/47dfac48bce7198ad4f1a388fc8c9491f878ac3b","name":"https://git.kernel.org/stable/c/47dfac48bce7198ad4f1a388fc8c9491f878ac3b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c292d4686f717c03e5022fc4ae7c782f39a94915","name":"https://git.kernel.org/stable/c/c292d4686f717c03e5022fc4ae7c782f39a94915","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74608","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74608","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cbc53148cc0946b72d62a3c53870cb22ce4ec284 64d7584e62ac8cdc750455c5fdc6008fc2de4f06 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cff97d683a083b862a8bb24309e0f4d2d928128a c292d4686f717c03e5022fc4ae7c782f39a94915 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 47dfac48bce7198ad4f1a388fc8c9491f878ac3b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 1ffacbadc14530e55b8d86f7b917524f6a0fb891 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 4986410316b1ae0e63c6ce418e4eb196723626e7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 22a6c5b3425f327e7f4c3606a72277dce82c7d83 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.78 6.1.183 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.17 6.6.152 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.7.5 6.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.152 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.104 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"74608","cve":"CVE-2026-74608","epss":"0.001730000","percentile":"0.067150000","score_date":"2026-08-24","updated_at":"2026-08-25 00:11:33"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/client/sess.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"64d7584e62ac8cdc750455c5fdc6008fc2de4f06","status":"affected","version":"cbc53148cc0946b72d62a3c53870cb22ce4ec284","versionType":"git"},{"lessThan":"c292d4686f717c03e5022fc4ae7c782f39a94915","status":"affected","version":"cff97d683a083b862a8bb24309e0f4d2d928128a","versionType":"git"},{"lessThan":"47dfac48bce7198ad4f1a388fc8c9491f878ac3b","status":"affected","version":"6aac002bcfd554aff6d3ebb55e1660d078d70ab0","versionType":"git"},{"lessThan":"1ffacbadc14530e55b8d86f7b917524f6a0fb891","status":"affected","version":"6aac002bcfd554aff6d3ebb55e1660d078d70ab0","versionType":"git"},{"lessThan":"1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805","status":"affected","version":"6aac002bcfd554aff6d3ebb55e1660d078d70ab0","versionType":"git"},{"lessThan":"4986410316b1ae0e63c6ce418e4eb196723626e7","status":"affected","version":"6aac002bcfd554aff6d3ebb55e1660d078d70ab0","versionType":"git"},{"status":"affected","version":"22a6c5b3425f327e7f4c3606a72277dce82c7d83","versionType":"git"},{"lessThan":"6.1.183","status":"affected","version":"6.1.78","versionType":"semver"},{"lessThan":"6.6.152","status":"affected","version":"6.6.17","versionType":"semver"},{"lessThan":"6.8","status":"affected","version":"6.7.5","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/client/sess.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.8"},{"lessThan":"6.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.152","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.104","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"6.1.78","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.152","versionStartIncluding":"6.6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.104","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix use-after-free in cifs_try_adding_channels()\n\ncifs_try_adding_channels() takes a temporary reference to an interface\nbefore dropping iface_lock. If cifs_ses_add_channel() fails, it drops\nthat reference and then increments iface->weight_fulfilled.\n\nA concurrent interface list refresh can remove the list reference while\nchannel creation is in progress. In that case, the failure-path\nkref_put() releases the last reference and frees iface. Updating\nweight_fulfilled afterward then accesses freed memory.\n\nIncrement weight_fulfilled before dropping the temporary reference,\nkeeping iface alive for the final access."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:31:55.298Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/64d7584e62ac8cdc750455c5fdc6008fc2de4f06"},{"url":"https://git.kernel.org/stable/c/c292d4686f717c03e5022fc4ae7c782f39a94915"},{"url":"https://git.kernel.org/stable/c/47dfac48bce7198ad4f1a388fc8c9491f878ac3b"},{"url":"https://git.kernel.org/stable/c/1ffacbadc14530e55b8d86f7b917524f6a0fb891"},{"url":"https://git.kernel.org/stable/c/1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805"},{"url":"https://git.kernel.org/stable/c/4986410316b1ae0e63c6ce418e4eb196723626e7"}],"title":"smb: client: Fix use-after-free in cifs_try_adding_channels()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74608","datePublished":"2026-08-22T15:31:55.298Z","dateReserved":"2026-08-15T05:44:03.920Z","dateUpdated":"2026-08-22T15:31:55.298Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:33","lastModifiedDate":"2026-08-22 16:16:33","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74608","Ordinal":"1","Title":"smb: client: Fix use-after-free in cifs_try_adding_channels()","CVE":"CVE-2026-74608","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74608","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix use-after-free in cifs_try_adding_channels()\n\ncifs_try_adding_channels() takes a temporary reference to an interface\nbefore dropping iface_lock. If cifs_ses_add_channel() fails, it drops\nthat reference and then increments iface->weight_fulfilled.\n\nA concurrent interface list refresh can remove the list reference while\nchannel creation is in progress. In that case, the failure-path\nkref_put() releases the last reference and frees iface. Updating\nweight_fulfilled afterward then accesses freed memory.\n\nIncrement weight_fulfilled before dropping the temporary reference,\nkeeping iface alive for the final access.","Type":"Description","Title":"smb: client: Fix use-after-free in cifs_try_adding_channels()"}]}}}