{"api_version":"1","generated_at":"2026-09-18T02:28:42+00:00","cve":"CVE-2026-90067","urls":{"html":"https://cve.report/CVE-2026-90067","api":"https://cve.report/api/cve/CVE-2026-90067.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90067","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90067"},"summary":{"title":"libceph: validate banner payload length","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: validate banner payload length\n\nWhen parsing the Ceph messenger v2 protocol banner, the `payload_len` field\nis decoded from the banner prefix. If a client sends a banner with a\n`payload_len` of 0, the kernel sets up a 0-length socket read. This\nviolates an invariant in the state machine, triggering a warning in\n`populate_in_iter()`:\n\n------------[ cut here ]------------\n!iov_iter_count(&con->v2.in_iter)\nWARNING: net/ceph/messenger_v2.c:3129 at populate_in_iter\nnet/ceph/messenger_v2.c:3129 [inline], CPU#1: kworker/1:3/5070\nWARNING: net/ceph/messenger_v2.c:3129 at ceph_con_v2_try_read+0x6634/0x6810\nnet/ceph/messenger_v2.c:3159, CPU#1: kworker/1:3/5070\n...\nCall Trace:\n <TASK>\n ceph_con_workfn+0x1f5/0x14a0 net/ceph/messenger.c:1575\n process_one_work kernel/workqueue.c:3322 [inline]\n process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405\n worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486\n kthread+0x388/0x470 kernel/kthread.c:436\n ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n </TASK>\n\nAccording to the msgr2 protocol specification, the banner payload is\nexpected to contain at least two 64-bit integers (`server_feat` and\n`server_req_feat`). Therefore, `payload_len` must be at least 16 bytes.\n\nFix this by adding a check in `process_banner_prefix()` to reject a\n`payload_len` smaller than 16 bytes. This prevents the 0-length read and\ncorrectly aborts the connection with a protocol error.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:16:55","updated_at":"2026-09-17 17:16:55"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/f374967fcdf04001c9b66df1c19106fa83cd91f7","name":"https://git.kernel.org/stable/c/f374967fcdf04001c9b66df1c19106fa83cd91f7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/279c0852999fd2384f4a88155091a99e81f96873","name":"https://git.kernel.org/stable/c/279c0852999fd2384f4a88155091a99e81f96873","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c1b937ff24b19e69aa7fb1b0f46a74d4c9668692","name":"https://git.kernel.org/stable/c/c1b937ff24b19e69aa7fb1b0f46a74d4c9668692","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6cf666e47f2b51d5a887ec8a3226cde951757d27","name":"https://git.kernel.org/stable/c/6cf666e47f2b51d5a887ec8a3226cde951757d27","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3b2e62a7655d347a845a91155610ddae11daffc6","name":"https://git.kernel.org/stable/c/3b2e62a7655d347a845a91155610ddae11daffc6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6d1c6f228854aa89844fd0152d7ed7ac72a55e89","name":"https://git.kernel.org/stable/c/6d1c6f228854aa89844fd0152d7ed7ac72a55e89","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c77633a9595658210a6e216a071e5a396a0835a7","name":"https://git.kernel.org/stable/c/c77633a9595658210a6e216a071e5a396a0835a7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90067","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90067","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cd1a677cad994021b19665ed476aea63f5d54f31 279c0852999fd2384f4a88155091a99e81f96873 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cd1a677cad994021b19665ed476aea63f5d54f31 6cf666e47f2b51d5a887ec8a3226cde951757d27 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cd1a677cad994021b19665ed476aea63f5d54f31 3b2e62a7655d347a845a91155610ddae11daffc6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cd1a677cad994021b19665ed476aea63f5d54f31 c1b937ff24b19e69aa7fb1b0f46a74d4c9668692 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cd1a677cad994021b19665ed476aea63f5d54f31 6d1c6f228854aa89844fd0152d7ed7ac72a55e89 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cd1a677cad994021b19665ed476aea63f5d54f31 c77633a9595658210a6e216a071e5a396a0835a7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cd1a677cad994021b19665ed476aea63f5d54f31 f374967fcdf04001c9b66df1c19106fa83cd91f7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-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":["net/ceph/messenger_v2.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"279c0852999fd2384f4a88155091a99e81f96873","status":"affected","version":"cd1a677cad994021b19665ed476aea63f5d54f31","versionType":"git"},{"lessThan":"6cf666e47f2b51d5a887ec8a3226cde951757d27","status":"affected","version":"cd1a677cad994021b19665ed476aea63f5d54f31","versionType":"git"},{"lessThan":"3b2e62a7655d347a845a91155610ddae11daffc6","status":"affected","version":"cd1a677cad994021b19665ed476aea63f5d54f31","versionType":"git"},{"lessThan":"c1b937ff24b19e69aa7fb1b0f46a74d4c9668692","status":"affected","version":"cd1a677cad994021b19665ed476aea63f5d54f31","versionType":"git"},{"lessThan":"6d1c6f228854aa89844fd0152d7ed7ac72a55e89","status":"affected","version":"cd1a677cad994021b19665ed476aea63f5d54f31","versionType":"git"},{"lessThan":"c77633a9595658210a6e216a071e5a396a0835a7","status":"affected","version":"cd1a677cad994021b19665ed476aea63f5d54f31","versionType":"git"},{"lessThan":"f374967fcdf04001c9b66df1c19106fa83cd91f7","status":"affected","version":"cd1a677cad994021b19665ed476aea63f5d54f31","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ceph/messenger_v2.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.11"},{"lessThan":"5.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: validate banner payload length\n\nWhen parsing the Ceph messenger v2 protocol banner, the `payload_len` field\nis decoded from the banner prefix. If a client sends a banner with a\n`payload_len` of 0, the kernel sets up a 0-length socket read. This\nviolates an invariant in the state machine, triggering a warning in\n`populate_in_iter()`:\n\n------------[ cut here ]------------\n!iov_iter_count(&con->v2.in_iter)\nWARNING: net/ceph/messenger_v2.c:3129 at populate_in_iter\nnet/ceph/messenger_v2.c:3129 [inline], CPU#1: kworker/1:3/5070\nWARNING: net/ceph/messenger_v2.c:3129 at ceph_con_v2_try_read+0x6634/0x6810\nnet/ceph/messenger_v2.c:3159, CPU#1: kworker/1:3/5070\n...\nCall Trace:\n <TASK>\n ceph_con_workfn+0x1f5/0x14a0 net/ceph/messenger.c:1575\n process_one_work kernel/workqueue.c:3322 [inline]\n process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405\n worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486\n kthread+0x388/0x470 kernel/kthread.c:436\n ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n </TASK>\n\nAccording to the msgr2 protocol specification, the banner payload is\nexpected to contain at least two 64-bit integers (`server_feat` and\n`server_req_feat`). Therefore, `payload_len` must be at least 16 bytes.\n\nFix this by adding a check in `process_banner_prefix()` to reject a\n`payload_len` smaller than 16 bytes. This prevents the 0-length read and\ncorrectly aborts the connection with a protocol error."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:05:49.600Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/279c0852999fd2384f4a88155091a99e81f96873"},{"url":"https://git.kernel.org/stable/c/6cf666e47f2b51d5a887ec8a3226cde951757d27"},{"url":"https://git.kernel.org/stable/c/3b2e62a7655d347a845a91155610ddae11daffc6"},{"url":"https://git.kernel.org/stable/c/c1b937ff24b19e69aa7fb1b0f46a74d4c9668692"},{"url":"https://git.kernel.org/stable/c/6d1c6f228854aa89844fd0152d7ed7ac72a55e89"},{"url":"https://git.kernel.org/stable/c/c77633a9595658210a6e216a071e5a396a0835a7"},{"url":"https://git.kernel.org/stable/c/f374967fcdf04001c9b66df1c19106fa83cd91f7"}],"title":"libceph: validate banner payload length","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90067","datePublished":"2026-09-17T16:05:49.600Z","dateReserved":"2026-09-11T19:38:34.784Z","dateUpdated":"2026-09-17T16:05:49.600Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:16:55","lastModifiedDate":"2026-09-17 17:16:55","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90067","Ordinal":"1","Title":"libceph: validate banner payload length","CVE":"CVE-2026-90067","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90067","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: validate banner payload length\n\nWhen parsing the Ceph messenger v2 protocol banner, the `payload_len` field\nis decoded from the banner prefix. If a client sends a banner with a\n`payload_len` of 0, the kernel sets up a 0-length socket read. This\nviolates an invariant in the state machine, triggering a warning in\n`populate_in_iter()`:\n\n------------[ cut here ]------------\n!iov_iter_count(&con->v2.in_iter)\nWARNING: net/ceph/messenger_v2.c:3129 at populate_in_iter\nnet/ceph/messenger_v2.c:3129 [inline], CPU#1: kworker/1:3/5070\nWARNING: net/ceph/messenger_v2.c:3129 at ceph_con_v2_try_read+0x6634/0x6810\nnet/ceph/messenger_v2.c:3159, CPU#1: kworker/1:3/5070\n...\nCall Trace:\n <TASK>\n ceph_con_workfn+0x1f5/0x14a0 net/ceph/messenger.c:1575\n process_one_work kernel/workqueue.c:3322 [inline]\n process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405\n worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486\n kthread+0x388/0x470 kernel/kthread.c:436\n ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n </TASK>\n\nAccording to the msgr2 protocol specification, the banner payload is\nexpected to contain at least two 64-bit integers (`server_feat` and\n`server_req_feat`). Therefore, `payload_len` must be at least 16 bytes.\n\nFix this by adding a check in `process_banner_prefix()` to reject a\n`payload_len` smaller than 16 bytes. This prevents the 0-length read and\ncorrectly aborts the connection with a protocol error.","Type":"Description","Title":"libceph: validate banner payload length"}]}}}