{"api_version":"1","generated_at":"2026-10-24T11:39:18+00:00","cve":"CVE-2026-98479","urls":{"html":"https://cve.report/CVE-2026-98479","api":"https://cve.report/api/cve/CVE-2026-98479.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98479","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98479"},"summary":{"title":"scsi: libiscsi_tcp: Check the data direction of a Data-In PDU","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi_tcp: Check the data direction of a Data-In PDU\n\nThe Data-In branch of iscsi_tcp_hdr_dissect() resolves the ITT to a task\nand copies the PDU's data segment into that command's scatterlist without\nasking whether the command was reading. iscsi_tcp_r2t_rsp() in the same\nfile does ask, and rejects an R2T for a command that is not DMA_TO_DEVICE.\n\nA target that answers a WRITE command's ITT with a Data-In therefore has\nthe initiator write target-supplied bytes into the pages that write was\nabout to send. Those are the caller's own pinned pages for an O_DIRECT\nwrite, and page cache pages for a buffered one.\n\nObserved against a test target that emits one 512-byte Data-In naming a 128\nKB write's ITT, after the R2T for that write. With O_DIRECT the caller's\nbuffer ends up holding 512 bytes of the target's data while pwrite()\nreturns 131072. Buffered is quieter: pwrite() and fsync() both succeed,\nnothing is logged, and reading those blocks back returns the target's bytes\nout of the page cache without a command going on the wire.\n\nCheck the direction before using the scatterlist, the way the R2T path\nalready does.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:16:58","updated_at":"2026-10-19 10:18:58"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/24ffc919467d20951f0f132d1c75294e2e91e09b","name":"https://git.kernel.org/stable/c/24ffc919467d20951f0f132d1c75294e2e91e09b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8db1232945bc663fb94f300090a1fc108de99296","name":"https://git.kernel.org/stable/c/8db1232945bc663fb94f300090a1fc108de99296","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e3b25bf2cf2496e85bc05b33360faf9fdf880e03","name":"https://git.kernel.org/stable/c/e3b25bf2cf2496e85bc05b33360faf9fdf880e03","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/de96dc11aee0d058927bff94a168e3c5c46483e2","name":"https://git.kernel.org/stable/c/de96dc11aee0d058927bff94a168e3c5c46483e2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/79991b770fc3685b1d5cf805b659a879edd19931","name":"https://git.kernel.org/stable/c/79991b770fc3685b1d5cf805b659a879edd19931","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ee56b5e18f566c0b5a183379dcd63d402cebf2f8","name":"https://git.kernel.org/stable/c/ee56b5e18f566c0b5a183379dcd63d402cebf2f8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bce07e2f37b5e4a427d36fd6b1c14067b27591db","name":"https://git.kernel.org/stable/c/bce07e2f37b5e4a427d36fd6b1c14067b27591db","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/94e5bdd08e51c450d954bc592f591c233ca5c9df","name":"https://git.kernel.org/stable/c/94e5bdd08e51c450d954bc592f591c233ca5c9df","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98479","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98479","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a081c13e39b5c17052a7b46fafa61019c4c110ff 79991b770fc3685b1d5cf805b659a879edd19931 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a081c13e39b5c17052a7b46fafa61019c4c110ff 8db1232945bc663fb94f300090a1fc108de99296 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a081c13e39b5c17052a7b46fafa61019c4c110ff 94e5bdd08e51c450d954bc592f591c233ca5c9df git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a081c13e39b5c17052a7b46fafa61019c4c110ff de96dc11aee0d058927bff94a168e3c5c46483e2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.222 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.55 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.9 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * 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":["drivers/scsi/libiscsi_tcp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"79991b770fc3685b1d5cf805b659a879edd19931","status":"affected","version":"a081c13e39b5c17052a7b46fafa61019c4c110ff","versionType":"git"},{"lessThan":"8db1232945bc663fb94f300090a1fc108de99296","status":"affected","version":"a081c13e39b5c17052a7b46fafa61019c4c110ff","versionType":"git"},{"lessThan":"94e5bdd08e51c450d954bc592f591c233ca5c9df","status":"affected","version":"a081c13e39b5c17052a7b46fafa61019c4c110ff","versionType":"git"},{"lessThan":"de96dc11aee0d058927bff94a168e3c5c46483e2","status":"affected","version":"a081c13e39b5c17052a7b46fafa61019c4c110ff","versionType":"git"},{"lessThan":"e3b25bf2cf2496e85bc05b33360faf9fdf880e03","status":"affected","version":"a081c13e39b5c17052a7b46fafa61019c4c110ff","versionType":"git"},{"lessThan":"ee56b5e18f566c0b5a183379dcd63d402cebf2f8","status":"affected","version":"a081c13e39b5c17052a7b46fafa61019c4c110ff","versionType":"git"},{"lessThan":"24ffc919467d20951f0f132d1c75294e2e91e09b","status":"affected","version":"a081c13e39b5c17052a7b46fafa61019c4c110ff","versionType":"git"},{"lessThan":"bce07e2f37b5e4a427d36fd6b1c14067b27591db","status":"affected","version":"a081c13e39b5c17052a7b46fafa61019c4c110ff","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/scsi/libiscsi_tcp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.29"},{"lessThan":"2.6.29","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.271","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.222","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","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":"6.18.55","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.271","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.222","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.55","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.9","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"2.6.29","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi_tcp: Check the data direction of a Data-In PDU\n\nThe Data-In branch of iscsi_tcp_hdr_dissect() resolves the ITT to a task\nand copies the PDU's data segment into that command's scatterlist without\nasking whether the command was reading. iscsi_tcp_r2t_rsp() in the same\nfile does ask, and rejects an R2T for a command that is not DMA_TO_DEVICE.\n\nA target that answers a WRITE command's ITT with a Data-In therefore has\nthe initiator write target-supplied bytes into the pages that write was\nabout to send. Those are the caller's own pinned pages for an O_DIRECT\nwrite, and page cache pages for a buffered one.\n\nObserved against a test target that emits one 512-byte Data-In naming a 128\nKB write's ITT, after the R2T for that write. With O_DIRECT the caller's\nbuffer ends up holding 512 bytes of the target's data while pwrite()\nreturns 131072. Buffered is quieter: pwrite() and fsync() both succeed,\nnothing is logged, and reading those blocks back returns the target's bytes\nout of the page cache without a command going on the wire.\n\nCheck the direction before using the scatterlist, the way the R2T path\nalready does."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:20:16.790Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/79991b770fc3685b1d5cf805b659a879edd19931"},{"url":"https://git.kernel.org/stable/c/8db1232945bc663fb94f300090a1fc108de99296"},{"url":"https://git.kernel.org/stable/c/94e5bdd08e51c450d954bc592f591c233ca5c9df"},{"url":"https://git.kernel.org/stable/c/de96dc11aee0d058927bff94a168e3c5c46483e2"},{"url":"https://git.kernel.org/stable/c/e3b25bf2cf2496e85bc05b33360faf9fdf880e03"},{"url":"https://git.kernel.org/stable/c/ee56b5e18f566c0b5a183379dcd63d402cebf2f8"},{"url":"https://git.kernel.org/stable/c/24ffc919467d20951f0f132d1c75294e2e91e09b"},{"url":"https://git.kernel.org/stable/c/bce07e2f37b5e4a427d36fd6b1c14067b27591db"}],"title":"scsi: libiscsi_tcp: Check the data direction of a Data-In PDU","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98479","datePublished":"2026-10-18T15:15:53.663Z","dateReserved":"2026-09-25T10:25:14.351Z","dateUpdated":"2026-10-19T09:20:16.790Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:16:58","lastModifiedDate":"2026-10-19 10:18:58","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98479","Ordinal":"1","Title":"scsi: libiscsi_tcp: Check the data direction of a Data-In PDU","CVE":"CVE-2026-98479","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98479","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi_tcp: Check the data direction of a Data-In PDU\n\nThe Data-In branch of iscsi_tcp_hdr_dissect() resolves the ITT to a task\nand copies the PDU's data segment into that command's scatterlist without\nasking whether the command was reading. iscsi_tcp_r2t_rsp() in the same\nfile does ask, and rejects an R2T for a command that is not DMA_TO_DEVICE.\n\nA target that answers a WRITE command's ITT with a Data-In therefore has\nthe initiator write target-supplied bytes into the pages that write was\nabout to send. Those are the caller's own pinned pages for an O_DIRECT\nwrite, and page cache pages for a buffered one.\n\nObserved against a test target that emits one 512-byte Data-In naming a 128\nKB write's ITT, after the R2T for that write. With O_DIRECT the caller's\nbuffer ends up holding 512 bytes of the target's data while pwrite()\nreturns 131072. Buffered is quieter: pwrite() and fsync() both succeed,\nnothing is logged, and reading those blocks back returns the target's bytes\nout of the page cache without a command going on the wire.\n\nCheck the direction before using the scatterlist, the way the R2T path\nalready does.","Type":"Description","Title":"scsi: libiscsi_tcp: Check the data direction of a Data-In PDU"}]}}}