{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-23242", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.989Z", "datePublished": "2026-03-18T10:05:05.108Z", "dateUpdated": "2026-08-05T12:20:52.020Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:20:52.020Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Fix potential NULL pointer dereference in header processing\n\nIf siw_get_hdr() returns -EINVAL before set_rx_fpdu_context(),\nqp->rx_fpdu can be NULL. The error path in siw_tcp_rx_data()\ndereferences qp->rx_fpdu->more_ddp_segs without checking, which\nmay lead to a NULL pointer deref. Only check more_ddp_segs when\nrx_fpdu is present.\n\nKASAN splat:\n[ 101.384271] KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7]\n[ 101.385869] RIP: 0010:siw_tcp_rx_data+0x13ad/0x1e50" } ], "metrics": [ { "cvssV3_1": { "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" }, "scenarios": [ { "lang": "en", "value": "AV:N - SIW (Software iWARP) operates over TCP connections. A remote RDMA peer can send malformed DDP/RDMAP packets with invalid version or opcode fields to trigger the NULL pointer dereference in the TCP receive callback siw_tcp_rx_data().\nAC:L - The attacker can reliably trigger the bug by sending a malformed DDP packet with an invalid version or opcode field after establishing the TCP/RDMA connection. No race condition or special conditions required.\nPR:N - The vulnerability is triggered during iWARP protocol message processing from a connected TCP peer. While an RDMA connection must be established first, this is part of the network protocol and does not require authentication credentials — any peer that can connect to the SIW port can trigger this.\nUI:N - No user interaction is required. The attacker triggers the bug by sending malformed network packets to an SIW-enabled service.\nS:U - The vulnerability crashes the kernel, which is within the same security authority. There is no crossing of a security boundary like VM escape.\nC:N - This is a pure NULL pointer dereference (access at offset 0xc0 from NULL). No information disclosure occurs — the kernel oopses/panics without leaking data.\nI:N - This is a NULL pointer dereference causing a crash. There is no memory corruption, no write primitive, and no code execution — the access address (0xc0) is not mappable on modern kernels.\nA:H - The NULL pointer dereference causes a kernel oops or panic, crashing the system. This is reliably triggerable by a remote attacker sending malformed iWARP packets." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/infiniband/sw/siw/siw_qp_rx.c" ], "versions": [ { "version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "ab61841633d10e56a58c1493a262f0d02dba2f5e", "status": "affected", "versionType": "git" }, { "version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "8564dcc12fbb372d984ab45768cae9335777b274", "status": "affected", "versionType": "git" }, { "version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "ab957056192d6bd068b3759cb2077d859cca01f0", "status": "affected", "versionType": "git" }, { "version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "ffba40b67663567481fa8a1ed5d2da36897c175d", "status": "affected", "versionType": "git" }, { "version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "87b7a036d2c73d5bb3ae2d47dee23de465db3355", "status": "affected", "versionType": "git" }, { "version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "714c99e1dc8f85f446e05be02ba83972e981a817", "status": "affected", "versionType": "git" }, { "version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "ce025f7f5d070596194315eb2e4e89d568b8a755", "status": "affected", "versionType": "git" }, { "version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "14ab3da122bd18920ad57428f6cf4fade8385142", "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/infiniband/sw/siw/siw_qp_rx.c" ], "versions": [ { "version": "5.3", "status": "affected" }, { "version": "0", "lessThan": "5.3", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.252", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.202", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "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": "5.3", "versionEndExcluding": "5.10.252" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.15.202" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.1.165" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.6.128" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.12.75" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.18.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.19.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/ab61841633d10e56a58c1493a262f0d02dba2f5e" }, { "url": "https://git.kernel.org/stable/c/8564dcc12fbb372d984ab45768cae9335777b274" }, { "url": "https://git.kernel.org/stable/c/ab957056192d6bd068b3759cb2077d859cca01f0" }, { "url": "https://git.kernel.org/stable/c/ffba40b67663567481fa8a1ed5d2da36897c175d" }, { "url": "https://git.kernel.org/stable/c/87b7a036d2c73d5bb3ae2d47dee23de465db3355" }, { "url": "https://git.kernel.org/stable/c/714c99e1dc8f85f446e05be02ba83972e981a817" }, { "url": "https://git.kernel.org/stable/c/ce025f7f5d070596194315eb2e4e89d568b8a755" }, { "url": "https://git.kernel.org/stable/c/14ab3da122bd18920ad57428f6cf4fade8385142" } ], "title": "RDMA/siw: Fix potential NULL pointer dereference in header processing", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-07-14T12:46:12.927Z" }, "affected": [ { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "references": [ { "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html" }, { "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html" } ] } ] } }