{"api_version":"1","generated_at":"2026-11-07T15:53:40+00:00","cve":"CVE-2026-99277","urls":{"html":"https://cve.report/CVE-2026-99277","api":"https://cve.report/api/cve/CVE-2026-99277.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-99277","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-99277"},"summary":{"title":"ksmbd: hold a connection reference for each session channel","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: hold a connection reference for each session channel\n\nksmbd_session_unregister() removes a session from the global and per-\nconnection tables before dropping the table reference. A concurrent\nreference holder can keep the session and its channel list alive after\nthose removals.\n\nConnection cleanup can no longer find the unpublished session to remove its\nchannels. Since a channel only stores a raw conn pointer, the connection\ncan be freed while another session reference holder is still accessing it,\nfor example during SMB3.1.1 binding or a procfs read.\n\nTake a connection reference when registering a channel and release it on\ninsertion failure, channel removal, or final session destruction. Keep the\nchannels and signing keys until the session is destroyed so a response can\nstill be signed after the session has been unregistered.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-11-07 14:17:03","updated_at":"2026-11-07 14:17:03"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/add8d7fb04efe564193df73581889c62fc0016f1","name":"https://git.kernel.org/stable/c/add8d7fb04efe564193df73581889c62fc0016f1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4b333aed69cfc2c8687b86b6a4364a0dffc16dd8","name":"https://git.kernel.org/stable/c/4b333aed69cfc2c8687b86b6a4364a0dffc16dd8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-99277","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99277","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d7fd1f98607f2cd358e583f9548bdf0173090a86 4b333aed69cfc2c8687b86b6a4364a0dffc16dd8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d7fd1f98607f2cd358e583f9548bdf0173090a86 add8d7fb04efe564193df73581889c62fc0016f1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c99ea7855124ca1428a1e59c2b4590aaef34eacf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.2.8 7.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3.2 7.3.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.4-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/server/mgmt/user_session.c","fs/smb/server/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4b333aed69cfc2c8687b86b6a4364a0dffc16dd8","status":"affected","version":"d7fd1f98607f2cd358e583f9548bdf0173090a86","versionType":"git"},{"lessThan":"add8d7fb04efe564193df73581889c62fc0016f1","status":"affected","version":"d7fd1f98607f2cd358e583f9548bdf0173090a86","versionType":"git"},{"status":"affected","version":"c99ea7855124ca1428a1e59c2b4590aaef34eacf","versionType":"git"},{"lessThan":"7.3","status":"affected","version":"7.2.8","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/server/mgmt/user_session.c","fs/smb/server/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.3"},{"lessThan":"7.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.3.*","status":"unaffected","version":"7.3.2","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.4-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3.2","versionStartIncluding":"7.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.4-rc1","versionStartIncluding":"7.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.2.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: hold a connection reference for each session channel\n\nksmbd_session_unregister() removes a session from the global and per-\nconnection tables before dropping the table reference. A concurrent\nreference holder can keep the session and its channel list alive after\nthose removals.\n\nConnection cleanup can no longer find the unpublished session to remove its\nchannels. Since a channel only stores a raw conn pointer, the connection\ncan be freed while another session reference holder is still accessing it,\nfor example during SMB3.1.1 binding or a procfs read.\n\nTake a connection reference when registering a channel and release it on\ninsertion failure, channel removal, or final session destruction. Keep the\nchannels and signing keys until the session is destroyed so a response can\nstill be signed after the session has been unregistered."}],"providerMetadata":{"dateUpdated":"2026-11-07T14:08:46.710Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/4b333aed69cfc2c8687b86b6a4364a0dffc16dd8"},{"url":"https://git.kernel.org/stable/c/add8d7fb04efe564193df73581889c62fc0016f1"}],"title":"ksmbd: hold a connection reference for each session channel","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-99277","datePublished":"2026-11-07T14:08:46.710Z","dateReserved":"2026-09-25T10:25:14.405Z","dateUpdated":"2026-11-07T14:08:46.710Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-11-07 14:17:03","lastModifiedDate":"2026-11-07 14:17:03","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"99277","Ordinal":"1","Title":"ksmbd: hold a connection reference for each session channel","CVE":"CVE-2026-99277","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"99277","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: hold a connection reference for each session channel\n\nksmbd_session_unregister() removes a session from the global and per-\nconnection tables before dropping the table reference. A concurrent\nreference holder can keep the session and its channel list alive after\nthose removals.\n\nConnection cleanup can no longer find the unpublished session to remove its\nchannels. Since a channel only stores a raw conn pointer, the connection\ncan be freed while another session reference holder is still accessing it,\nfor example during SMB3.1.1 binding or a procfs read.\n\nTake a connection reference when registering a channel and release it on\ninsertion failure, channel removal, or final session destruction. Keep the\nchannels and signing keys until the session is destroyed so a response can\nstill be signed after the session has been unregistered.","Type":"Description","Title":"ksmbd: hold a connection reference for each session channel"}]}}}