{"api_version":"1","generated_at":"2026-07-23T13:30:38+00:00","cve":"CVE-2026-22998","urls":{"html":"https://cve.report/CVE-2026-22998","api":"https://cve.report/api/cve/CVE-2026-22998.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-22998","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-22998"},"summary":{"title":"nvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec\n\nCommit efa56305908b (\"nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length\")\nadded ttag bounds checking and data_offset\nvalidation in nvmet_tcp_handle_h2c_data_pdu(), but it did not validate\nwhether the command's data structures (cmd->req.sg and cmd->iov) have\nbeen properly initialized before processing H2C_DATA PDUs.\n\nThe nvmet_tcp_build_pdu_iovec() function dereferences these pointers\nwithout NULL checks. This can be triggered by sending H2C_DATA PDU\nimmediately after the ICREQ/ICRESP handshake, before\nsending a CONNECT command or NVMe write command.\n\nAttack vectors that trigger NULL pointer dereferences:\n1. H2C_DATA PDU sent before CONNECT → both pointers NULL\n2. H2C_DATA PDU for READ command → cmd->req.sg allocated, cmd->iov NULL\n3. H2C_DATA PDU for uninitialized command slot → both pointers NULL\n\nThe fix validates both cmd->req.sg and cmd->iov before calling\nnvmet_tcp_build_pdu_iovec(). Both checks are required because:\n- Uninitialized commands: both NULL\n- READ commands: cmd->req.sg allocated, cmd->iov NULL\n- WRITE commands: both allocated","state":"PUBLISHED","assigner":"Linux","published_at":"2026-01-25 15:15:54","updated_at":"2026-04-27 14:16:28"},"problem_types":["CWE-476"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/32b63acd78f577b332d976aa06b56e70d054cbba","name":"https://git.kernel.org/stable/c/32b63acd78f577b332d976aa06b56e70d054cbba","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/baabe43a0edefac8cd7b981ff87f967f6034dafe","name":"https://git.kernel.org/stable/c/baabe43a0edefac8cd7b981ff87f967f6034dafe","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fdecd3b6aac10d5a18d0dc500fe57f8648b66cd4","name":"https://git.kernel.org/stable/c/fdecd3b6aac10d5a18d0dc500fe57f8648b66cd4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7d75570002929d20e40110d6b03e46202c9d1bc7","name":"https://git.kernel.org/stable/c/7d75570002929d20e40110d6b03e46202c9d1bc7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3def5243150716be86599c2a1767c29c68838b6d","name":"https://git.kernel.org/stable/c/3def5243150716be86599c2a1767c29c68838b6d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/76abc83a9d25593c2b7613c549413079c14a4686","name":"https://git.kernel.org/stable/c/76abc83a9d25593c2b7613c549413079c14a4686","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/374b095e265fa27465f34780e0eb162ff1bef913","name":"https://git.kernel.org/stable/c/374b095e265fa27465f34780e0eb162ff1bef913","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-22998","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22998","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f775f2621c2ac5cc3a0b3a64665dad4fb146e510 baabe43a0edefac8cd7b981ff87f967f6034dafe git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4cb3cf7177ae3666be7fb27d4ad4d72a295fb02d 76abc83a9d25593c2b7613c549413079c14a4686 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2871aa407007f6f531fae181ad252486e022df42 7d75570002929d20e40110d6b03e46202c9d1bc7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 24e05760186dc070d3db190ca61efdbce23afc88 fdecd3b6aac10d5a18d0dc500fe57f8648b66cd4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected efa56305908ba20de2104f1b8508c6a7401833be 3def5243150716be86599c2a1767c29c68838b6d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected efa56305908ba20de2104f1b8508c6a7401833be 374b095e265fa27465f34780e0eb162ff1bef913 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected efa56305908ba20de2104f1b8508c6a7401833be 32b63acd78f577b332d976aa06b56e70d054cbba git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ee5e7632e981673f42a50ade25e71e612e543d9d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 70154e8d015c9b4fb56c1a2ef1fc8b83d45c7f68 git","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 5.10.249 5.10.* 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2026","cve_id":"22998","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/nvme/target/tcp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"baabe43a0edefac8cd7b981ff87f967f6034dafe","status":"affected","version":"f775f2621c2ac5cc3a0b3a64665dad4fb146e510","versionType":"git"},{"lessThan":"76abc83a9d25593c2b7613c549413079c14a4686","status":"affected","version":"4cb3cf7177ae3666be7fb27d4ad4d72a295fb02d","versionType":"git"},{"lessThan":"7d75570002929d20e40110d6b03e46202c9d1bc7","status":"affected","version":"2871aa407007f6f531fae181ad252486e022df42","versionType":"git"},{"lessThan":"fdecd3b6aac10d5a18d0dc500fe57f8648b66cd4","status":"affected","version":"24e05760186dc070d3db190ca61efdbce23afc88","versionType":"git"},{"lessThan":"3def5243150716be86599c2a1767c29c68838b6d","status":"affected","version":"efa56305908ba20de2104f1b8508c6a7401833be","versionType":"git"},{"lessThan":"374b095e265fa27465f34780e0eb162ff1bef913","status":"affected","version":"efa56305908ba20de2104f1b8508c6a7401833be","versionType":"git"},{"lessThan":"32b63acd78f577b332d976aa06b56e70d054cbba","status":"affected","version":"efa56305908ba20de2104f1b8508c6a7401833be","versionType":"git"},{"status":"affected","version":"ee5e7632e981673f42a50ade25e71e612e543d9d","versionType":"git"},{"status":"affected","version":"70154e8d015c9b4fb56c1a2ef1fc8b83d45c7f68","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/nvme/target/tcp.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":"5.10.*","status":"unaffected","version":"5.10.249","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.199","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.162","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.122","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.67","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.19","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.249","versionStartIncluding":"5.10.209","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.199","versionStartIncluding":"5.15.148","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.162","versionStartIncluding":"6.1.75","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.122","versionStartIncluding":"6.6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.67","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.7","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.268","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec\n\nCommit efa56305908b (\"nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length\")\nadded ttag bounds checking and data_offset\nvalidation in nvmet_tcp_handle_h2c_data_pdu(), but it did not validate\nwhether the command's data structures (cmd->req.sg and cmd->iov) have\nbeen properly initialized before processing H2C_DATA PDUs.\n\nThe nvmet_tcp_build_pdu_iovec() function dereferences these pointers\nwithout NULL checks. This can be triggered by sending H2C_DATA PDU\nimmediately after the ICREQ/ICRESP handshake, before\nsending a CONNECT command or NVMe write command.\n\nAttack vectors that trigger NULL pointer dereferences:\n1. H2C_DATA PDU sent before CONNECT → both pointers NULL\n2. H2C_DATA PDU for READ command → cmd->req.sg allocated, cmd->iov NULL\n3. H2C_DATA PDU for uninitialized command slot → both pointers NULL\n\nThe fix validates both cmd->req.sg and cmd->iov before calling\nnvmet_tcp_build_pdu_iovec(). Both checks are required because:\n- Uninitialized commands: both NULL\n- READ commands: cmd->req.sg allocated, cmd->iov NULL\n- WRITE commands: both allocated"}],"metrics":[{"cvssV3_1":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-04-27T14:02:03.251Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/baabe43a0edefac8cd7b981ff87f967f6034dafe"},{"url":"https://git.kernel.org/stable/c/76abc83a9d25593c2b7613c549413079c14a4686"},{"url":"https://git.kernel.org/stable/c/7d75570002929d20e40110d6b03e46202c9d1bc7"},{"url":"https://git.kernel.org/stable/c/fdecd3b6aac10d5a18d0dc500fe57f8648b66cd4"},{"url":"https://git.kernel.org/stable/c/3def5243150716be86599c2a1767c29c68838b6d"},{"url":"https://git.kernel.org/stable/c/374b095e265fa27465f34780e0eb162ff1bef913"},{"url":"https://git.kernel.org/stable/c/32b63acd78f577b332d976aa06b56e70d054cbba"}],"title":"nvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-22998","datePublished":"2026-01-25T14:36:12.935Z","dateReserved":"2026-01-13T15:37:45.938Z","dateUpdated":"2026-04-27T14:02:03.251Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-01-25 15:15:54","lastModifiedDate":"2026-04-27 14:16:28","problem_types":["CWE-476"],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.268","versionEndExcluding":"5.5","matchCriteriaId":"2E4BEAC0-E873-440D-A75E-55699C2412A4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.209","versionEndExcluding":"5.10.249","matchCriteriaId":"B6983E9C-F8A9-4494-8156-3E2F7E736BF8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.148","versionEndExcluding":"5.15.199","matchCriteriaId":"B0275B58-DF8C-46AE-B9A5-20396D123D12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.75","versionEndExcluding":"6.1.162","matchCriteriaId":"9DE91ACC-6DAF-42AE-8D41-3A91572E9052"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.14","versionEndExcluding":"6.6.122","matchCriteriaId":"68AE0BF9-0835-45D8-AACC-EDFAC1663259"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7.2","versionEndExcluding":"6.12.67","matchCriteriaId":"2B14F508-4490-4A35-BEFC-40EF300279E7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.7","matchCriteriaId":"99FF3E05-0E7A-44E9-8E47-BF6F1F8EC436"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*","matchCriteriaId":"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*","matchCriteriaId":"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*","matchCriteriaId":"F71D92C0-C023-48BD-B3B6-70B638EEE298"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*","matchCriteriaId":"13580667-0A98-40CC-B29F-D12790B91BDB"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*","matchCriteriaId":"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"22998","Ordinal":"1","Title":"nvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_i","CVE":"CVE-2026-22998","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"22998","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec\n\nCommit efa56305908b (\"nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length\")\nadded ttag bounds checking and data_offset\nvalidation in nvmet_tcp_handle_h2c_data_pdu(), but it did not validate\nwhether the command's data structures (cmd->req.sg and cmd->iov) have\nbeen properly initialized before processing H2C_DATA PDUs.\n\nThe nvmet_tcp_build_pdu_iovec() function dereferences these pointers\nwithout NULL checks. This can be triggered by sending H2C_DATA PDU\nimmediately after the ICREQ/ICRESP handshake, before\nsending a CONNECT command or NVMe write command.\n\nAttack vectors that trigger NULL pointer dereferences:\n1. H2C_DATA PDU sent before CONNECT → both pointers NULL\n2. H2C_DATA PDU for READ command → cmd->req.sg allocated, cmd->iov NULL\n3. H2C_DATA PDU for uninitialized command slot → both pointers NULL\n\nThe fix validates both cmd->req.sg and cmd->iov before calling\nnvmet_tcp_build_pdu_iovec(). Both checks are required because:\n- Uninitialized commands: both NULL\n- READ commands: cmd->req.sg allocated, cmd->iov NULL\n- WRITE commands: both allocated","Type":"Description","Title":"nvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_i"}]}}}