{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-50674",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-09T01:26:45.991Z",
        "datePublished": "2025-12-09T01:29:26.600Z",
        "dateUpdated": "2026-05-11T19:23:35.166Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:23:35.166Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: vdso: fix NULL deference in vdso_join_timens() when vfork\n\nTesting tools/testing/selftests/timens/vfork_exec.c got below\nkernel log:\n\n[    6.838454] Unable to handle kernel access to user memory without uaccess routines at virtual address 0000000000000020\n[    6.842255] Oops [#1]\n[    6.842871] Modules linked in:\n[    6.844249] CPU: 1 PID: 64 Comm: vfork_exec Not tainted 6.0.0-rc3-rt15+ #8\n[    6.845861] Hardware name: riscv-virtio,qemu (DT)\n[    6.848009] epc : vdso_join_timens+0xd2/0x110\n[    6.850097]  ra : vdso_join_timens+0xd2/0x110\n[    6.851164] epc : ffffffff8000635c ra : ffffffff8000635c sp : ff6000000181fbf0\n[    6.852562]  gp : ffffffff80cff648 tp : ff60000000fdb700 t0 : 3030303030303030\n[    6.853852]  t1 : 0000000000000030 t2 : 3030303030303030 s0 : ff6000000181fc40\n[    6.854984]  s1 : ff60000001e6c000 a0 : 0000000000000010 a1 : ffffffff8005654c\n[    6.856221]  a2 : 00000000ffffefff a3 : 0000000000000000 a4 : 0000000000000000\n[    6.858114]  a5 : 0000000000000000 a6 : 0000000000000008 a7 : 0000000000000038\n[    6.859484]  s2 : ff60000001e6c068 s3 : ff6000000108abb0 s4 : 0000000000000000\n[    6.860751]  s5 : 0000000000001000 s6 : ffffffff8089dc40 s7 : ffffffff8089dc38\n[    6.862029]  s8 : ffffffff8089dc30 s9 : ff60000000fdbe38 s10: 000000000000005e\n[    6.863304]  s11: ffffffff80cc3510 t3 : ffffffff80d1112f t4 : ffffffff80d1112f\n[    6.864565]  t5 : ffffffff80d11130 t6 : ff6000000181fa00\n[    6.865561] status: 0000000000000120 badaddr: 0000000000000020 cause: 000000000000000d\n[    6.868046] [<ffffffff8008dc94>] timens_commit+0x38/0x11a\n[    6.869089] [<ffffffff8008dde8>] timens_on_fork+0x72/0xb4\n[    6.870055] [<ffffffff80190096>] begin_new_exec+0x3c6/0x9f0\n[    6.871231] [<ffffffff801d826c>] load_elf_binary+0x628/0x1214\n[    6.872304] [<ffffffff8018ee7a>] bprm_execve+0x1f2/0x4e4\n[    6.873243] [<ffffffff8018f90c>] do_execveat_common+0x16e/0x1ee\n[    6.874258] [<ffffffff8018f9c8>] sys_execve+0x3c/0x48\n[    6.875162] [<ffffffff80003556>] ret_from_syscall+0x0/0x2\n[    6.877484] ---[ end trace 0000000000000000 ]---\n\nThis is because the mm->context.vdso_info is NULL in vfork case. From\nanother side, mm->context.vdso_info either points to vdso info\nfor RV64 or vdso info for compat, there's no need to bloat riscv's\nmm_context_t, we can handle the difference when setup the additional\npage for vdso."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/riscv/include/asm/mmu.h",
                        "arch/riscv/kernel/vdso.c"
                    ],
                    "versions": [
                        {
                            "version": "3092eb45637573c5e435fbf5eaf9516316e5f9c6",
                            "lessThan": "df30c4feba51beeb138f3518c2421abc8cbda3c1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3092eb45637573c5e435fbf5eaf9516316e5f9c6",
                            "lessThan": "f2419a6fbb4caf8cf3fe0ac7e4cf2e28127d04b4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3092eb45637573c5e435fbf5eaf9516316e5f9c6",
                            "lessThan": "a8616d2dc193b6becc36b5f3cfeaa9ac7a5762f9",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/riscv/include/asm/mmu.h",
                        "arch/riscv/kernel/vdso.c"
                    ],
                    "versions": [
                        {
                            "version": "5.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.19.17",
                            "lessThanOrEqual": "5.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.3",
                            "lessThanOrEqual": "6.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1",
                            "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": "5.19",
                                    "versionEndExcluding": "5.19.17"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.0.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/df30c4feba51beeb138f3518c2421abc8cbda3c1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f2419a6fbb4caf8cf3fe0ac7e4cf2e28127d04b4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a8616d2dc193b6becc36b5f3cfeaa9ac7a5762f9"
                }
            ],
            "title": "riscv: vdso: fix NULL deference in vdso_join_timens() when vfork",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}