{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-22998", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.938Z", "datePublished": "2026-01-25T14:36:12.935Z", "dateUpdated": "2026-01-25T14:36:12.935Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-01-25T14:36:12.935Z"}, "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 \u2192 both pointers NULL\n2. H2C_DATA PDU for READ command \u2192 cmd->req.sg allocated, cmd->iov NULL\n3. H2C_DATA PDU for uninitialized command slot \u2192 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"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/tcp.c"], "versions": [{"version": "efa56305908ba20de2104f1b8508c6a7401833be", "lessThan": "3def5243150716be86599c2a1767c29c68838b6d", "status": "affected", "versionType": "git"}, {"version": "efa56305908ba20de2104f1b8508c6a7401833be", "lessThan": "374b095e265fa27465f34780e0eb162ff1bef913", "status": "affected", "versionType": "git"}, {"version": "efa56305908ba20de2104f1b8508c6a7401833be", "lessThan": "32b63acd78f577b332d976aa06b56e70d054cbba", "status": "affected", "versionType": "git"}, {"version": "ee5e7632e981673f42a50ade25e71e612e543d9d", "status": "affected", "versionType": "git"}, {"version": "f775f2621c2ac5cc3a0b3a64665dad4fb146e510", "status": "affected", "versionType": "git"}, {"version": "4cb3cf7177ae3666be7fb27d4ad4d72a295fb02d", "status": "affected", "versionType": "git"}, {"version": "2871aa407007f6f531fae181ad252486e022df42", "status": "affected", "versionType": "git"}, {"version": "24e05760186dc070d3db190ca61efdbce23afc88", "status": "affected", "versionType": "git"}, {"version": "70154e8d015c9b4fb56c1a2ef1fc8b83d45c7f68", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/tcp.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.67", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.7", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19-rc6", "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": "6.8", "versionEndExcluding": "6.12.67"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.19-rc6"}, {"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": "5.10.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7.2"}]}]}], "references": [{"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"}}}}

{}

{"cveTags": [], "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 \u2192 both pointers NULL\n2. H2C_DATA PDU for READ command \u2192 cmd->req.sg allocated, cmd->iov NULL\n3. H2C_DATA PDU for uninitialized command slot \u2192 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"}], "id": "CVE-2026-22998", "lastModified": "2026-01-25T15:15:54.643", "metrics": {}, "published": "2026-01-25T15:15:54.643", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/32b63acd78f577b332d976aa06b56e70d054cbba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/374b095e265fa27465f34780e0eb162ff1bef913"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3def5243150716be86599c2a1767c29c68838b6d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}