{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98261", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.332Z", "datePublished": "2026-10-06T08:45:25.361Z", "dateUpdated": "2026-10-06T08:45:25.361Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-06T08:45:25.361Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: Fix server use-after-free in cifs_chan_skip_or_disable()\n\nWhen a secondary channel is no longer supported by the server,\ncifs_chan_skip_or_disable() drops the channel reference with\ncifs_put_tcp_session() and then continues to use the server pointer by\ncalling cifs_signal_cifsd_for_reconnect() on it and reading its\nprimary_server pointer. cifs_put_tcp_session() can drop the last\nreference of the channel and tear it down, so both the channel and the\nprimary server (whose reference is also dropped by\ncifs_put_tcp_session()) can be freed before they are signaled for\nreconnect.\n\nSignal the channel and the primary server and capture the primary\nserver pointer before dropping the channel reference with\ncifs_put_tcp_session()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2pdu.c"], "versions": [{"version": "50e8363ecc85da49764781da90ebffe1a657b370", "lessThan": "0338489960ddad6368bce55e8adbc176c523093d", "status": "affected", "versionType": "git"}, {"version": "f591062bdbf4742b7f1622173017f19e927057b0", "lessThan": "edd52eae5fcfb8433b6bb0e7cd98db438fe01227", "status": "affected", "versionType": "git"}, {"version": "f591062bdbf4742b7f1622173017f19e927057b0", "lessThan": "fcc0a935bb6e37ecbf7e4335061309f896f35780", "status": "affected", "versionType": "git"}, {"version": "f591062bdbf4742b7f1622173017f19e927057b0", "lessThan": "7a1b27780b113583a94256d58dabfe7c0d9286e7", "status": "affected", "versionType": "git"}, {"version": "f591062bdbf4742b7f1622173017f19e927057b0", "lessThan": "717e0a25036b6c92cecace30913b2d874a4c22b8", "status": "affected", "versionType": "git"}, {"version": "d61ba1d71ea6039eca7ada870bf3f0c3c8fc12e4", "status": "affected", "versionType": "git"}, {"version": "6.6.15", "lessThan": "6.6.158", "status": "affected", "versionType": "semver"}, {"version": "6.7.3", "lessThan": "6.8", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2pdu.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.54", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.8", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc4", "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": "6.6.15", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.3-rc4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0338489960ddad6368bce55e8adbc176c523093d"}, {"url": "https://git.kernel.org/stable/c/edd52eae5fcfb8433b6bb0e7cd98db438fe01227"}, {"url": "https://git.kernel.org/stable/c/fcc0a935bb6e37ecbf7e4335061309f896f35780"}, {"url": "https://git.kernel.org/stable/c/7a1b27780b113583a94256d58dabfe7c0d9286e7"}, {"url": "https://git.kernel.org/stable/c/717e0a25036b6c92cecace30913b2d874a4c22b8"}], "title": "cifs: Fix server use-after-free in cifs_chan_skip_or_disable()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/smb2pdu.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "0338489960ddad6368bce55e8adbc176c523093d", "status": "affected", "version": "50e8363ecc85da49764781da90ebffe1a657b370", "versionType": "git"}, {"lessThan": "edd52eae5fcfb8433b6bb0e7cd98db438fe01227", "status": "affected", "version": "f591062bdbf4742b7f1622173017f19e927057b0", "versionType": "git"}, {"lessThan": "fcc0a935bb6e37ecbf7e4335061309f896f35780", "status": "affected", "version": "f591062bdbf4742b7f1622173017f19e927057b0", "versionType": "git"}, {"lessThan": "7a1b27780b113583a94256d58dabfe7c0d9286e7", "status": "affected", "version": "f591062bdbf4742b7f1622173017f19e927057b0", "versionType": "git"}, {"lessThan": "717e0a25036b6c92cecace30913b2d874a4c22b8", "status": "affected", "version": "f591062bdbf4742b7f1622173017f19e927057b0", "versionType": "git"}, {"status": "affected", "version": "d61ba1d71ea6039eca7ada870bf3f0c3c8fc12e4", "versionType": "git"}, {"lessThan": "6.6.158", "status": "affected", "version": "6.6.15", "versionType": "semver"}, {"lessThan": "6.8", "status": "affected", "version": "6.7.3", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/client/smb2pdu.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": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.54", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc4", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: Fix server use-after-free in cifs_chan_skip_or_disable()\n\nWhen a secondary channel is no longer supported by the server,\ncifs_chan_skip_or_disable() drops the channel reference with\ncifs_put_tcp_session() and then continues to use the server pointer by\ncalling cifs_signal_cifsd_for_reconnect() on it and reading its\nprimary_server pointer. cifs_put_tcp_session() can drop the last\nreference of the channel and tear it down, so both the channel and the\nprimary server (whose reference is also dropped by\ncifs_put_tcp_session()) can be freed before they are signaled for\nreconnect.\n\nSignal the channel and the primary server and capture the primary\nserver pointer before dropping the channel reference with\ncifs_put_tcp_session()."}], "id": "CVE-2026-98261", "lastModified": "2026-10-06T09:18:15.200", "metrics": {}, "published": "2026-10-06T09:18:15.200", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0338489960ddad6368bce55e8adbc176c523093d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/717e0a25036b6c92cecace30913b2d874a4c22b8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7a1b27780b113583a94256d58dabfe7c0d9286e7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/edd52eae5fcfb8433b6bb0e7cd98db438fe01227"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fcc0a935bb6e37ecbf7e4335061309f896f35780"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[50e8363ecc85da49764781da90ebffe1a657b370,0338489960ddad6368bce55e8adbc176c523093d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f591062bdbf4742b7f1622173017f19e927057b0,edd52eae5fcfb8433b6bb0e7cd98db438fe01227)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f591062bdbf4742b7f1622173017f19e927057b0,fcc0a935bb6e37ecbf7e4335061309f896f35780)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f591062bdbf4742b7f1622173017f19e927057b0,7a1b27780b113583a94256d58dabfe7c0d9286e7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f591062bdbf4742b7f1622173017f19e927057b0,717e0a25036b6c92cecace30913b2d874a4c22b8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "d61ba1d71ea6039eca7ada870bf3f0c3c8fc12e4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.6.15,6.6.158)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.7.3,6.8)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.54,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.8,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc4,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-06T15:00:18.385810+00:00", "updated": "2026-10-06T20:30:05.421528+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}