{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-52941",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.370Z",
        "datePublished": "2026-06-24T07:14:29.943Z",
        "dateUpdated": "2026-06-24T07:14:29.943Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-24T07:14:29.943Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: avoid NULL deref of conn->lnk in smc_msg_event tracepoint\n\nThe smc_msg_event tracepoint class, shared by smc_tx_sendmsg and\nsmc_rx_recvmsg, unconditionally dereferences smc->conn.lnk:\n\n\t__string(name, smc->conn.lnk->ibname)\n\nconn->lnk is only set for SMC-R; for SMC-D it is NULL. Other code on\nthese paths already handles this (e.g. !conn->lnk in\nSMC_STAT_RMB_TX_SIZE_SMALL()). With the tracepoint enabled, the first\nsendmsg()/recvmsg() on an SMC-D socket crashes:\n\n  Oops: general protection fault, probably for non-canonical address\n  KASAN: null-ptr-deref in range [...]\n  RIP: 0010:strlen+0x1e/0xa0\n  Call Trace:\n   trace_event_raw_event_smc_msg_event (net/smc/smc_tracepoint.h:44)\n   smc_rx_recvmsg (net/smc/smc_rx.c:515)\n   smc_recvmsg (net/smc/af_smc.c:2859)\n   __sys_recvfrom (net/socket.c:2315)\n   __x64_sys_recvfrom (net/socket.c:2326)\n   do_syscall_64\n\nThe faulting address 0x3e0 is offsetof(struct smc_link, ibname),\nconfirming the NULL ->lnk deref. Enabling the tracepoint requires\nroot, but the trigger itself is unprivileged: socket(AF_SMC, ...) has\nno capability check, and SMC-D negotiation needs no admin step on\ns390 or on x86 with the loopback ISM device loaded.\n\nLog an empty device name for SMC-D instead of dereferencing NULL."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/smc/smc_tracepoint.h"
                    ],
                    "versions": [
                        {
                            "version": "aff3083f10bff7a37eaa2b4e6bc5fb627ddd5f84",
                            "lessThan": "68200112534bb2acd1d7117dc2d5c124868d866d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aff3083f10bff7a37eaa2b4e6bc5fb627ddd5f84",
                            "lessThan": "720c76b930c52cd58f50eb6b10569d03dccc7959",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aff3083f10bff7a37eaa2b4e6bc5fb627ddd5f84",
                            "lessThan": "b706d6d76a2a2793fe5ad0fbc2a75b6a460094ef",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aff3083f10bff7a37eaa2b4e6bc5fb627ddd5f84",
                            "lessThan": "d2ea0b8aef8746e147602eac87ca8538f4bc7e66",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aff3083f10bff7a37eaa2b4e6bc5fb627ddd5f84",
                            "lessThan": "561cf66fa9b6c86dfe4e687d2d1aeaaa6739917f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aff3083f10bff7a37eaa2b4e6bc5fb627ddd5f84",
                            "lessThan": "7bf563badd37cb796df5477d2b78bb64148a1268",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/smc/smc_tracepoint.h"
                    ],
                    "versions": [
                        {
                            "version": "5.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.175",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.142",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.92",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.34",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.11",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "5.16",
                                    "versionEndExcluding": "6.1.175"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.16",
                                    "versionEndExcluding": "6.6.142"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.16",
                                    "versionEndExcluding": "6.12.92"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.16",
                                    "versionEndExcluding": "6.18.34"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.16",
                                    "versionEndExcluding": "7.0.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.16",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/68200112534bb2acd1d7117dc2d5c124868d866d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/720c76b930c52cd58f50eb6b10569d03dccc7959"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b706d6d76a2a2793fe5ad0fbc2a75b6a460094ef"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d2ea0b8aef8746e147602eac87ca8538f4bc7e66"
                },
                {
                    "url": "https://git.kernel.org/stable/c/561cf66fa9b6c86dfe4e687d2d1aeaaa6739917f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7bf563badd37cb796df5477d2b78bb64148a1268"
                }
            ],
            "title": "net/smc: avoid NULL deref of conn->lnk in smc_msg_event tracepoint",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}