{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-54203",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-30T12:06:44.499Z",
        "datePublished": "2025-12-30T12:09:07.538Z",
        "dateUpdated": "2026-05-11T19:57:27.814Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:57:27.814Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr\n\nWhen smb1 mount fails, KASAN detect slab-out-of-bounds in\ninit_smb2_rsp_hdr like the following one.\nFor smb1 negotiate(56bytes) , init_smb2_rsp_hdr() for smb2 is called.\nThe issue occurs while handling smb1 negotiate as smb2 server operations.\nAdd smb server operations for smb1 (get_cmd_val, init_rsp_hdr,\nallocate_rsp_buf, check_user_session) to handle smb1 negotiate so that\nsmb2 server operation does not handle it.\n\n[  411.400423] CIFS: VFS: Use of the less secure dialect vers=1.0 is\nnot recommended unless required for access to very old servers\n[  411.400452] CIFS: Attempting to mount \\\\192.168.45.139\\homes\n[  411.479312] ksmbd: init_smb2_rsp_hdr : 492\n[  411.479323] ==================================================================\n[  411.479327] BUG: KASAN: slab-out-of-bounds in\ninit_smb2_rsp_hdr+0x1e2/0x1f4 [ksmbd]\n[  411.479369] Read of size 16 at addr ffff888488ed0734 by task kworker/14:1/199\n\n[  411.479379] CPU: 14 PID: 199 Comm: kworker/14:1 Tainted: G\n OE      6.1.21 #3\n[  411.479386] Hardware name: ASUSTeK COMPUTER INC. Z10PA-D8\nSeries/Z10PA-D8 Series, BIOS 3801 08/23/2019\n[  411.479390] Workqueue: ksmbd-io handle_ksmbd_work [ksmbd]\n[  411.479425] Call Trace:\n[  411.479428]  <TASK>\n[  411.479432]  dump_stack_lvl+0x49/0x63\n[  411.479444]  print_report+0x171/0x4a8\n[  411.479452]  ? kasan_complete_mode_report_info+0x3c/0x200\n[  411.479463]  ? init_smb2_rsp_hdr+0x1e2/0x1f4 [ksmbd]\n[  411.479497]  kasan_report+0xb4/0x130\n[  411.479503]  ? init_smb2_rsp_hdr+0x1e2/0x1f4 [ksmbd]\n[  411.479537]  kasan_check_range+0x149/0x1e0\n[  411.479543]  memcpy+0x24/0x70\n[  411.479550]  init_smb2_rsp_hdr+0x1e2/0x1f4 [ksmbd]\n[  411.479585]  handle_ksmbd_work+0x109/0x760 [ksmbd]\n[  411.479616]  ? _raw_spin_unlock_irqrestore+0x50/0x50\n[  411.479624]  ? smb3_encrypt_resp+0x340/0x340 [ksmbd]\n[  411.479656]  process_one_work+0x49c/0x790\n[  411.479667]  worker_thread+0x2b1/0x6e0\n[  411.479674]  ? process_one_work+0x790/0x790\n[  411.479680]  kthread+0x177/0x1b0\n[  411.479686]  ? kthread_complete_and_exit+0x30/0x30\n[  411.479692]  ret_from_fork+0x22/0x30\n[  411.479702]  </TASK>"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ksmbd/server.c",
                        "fs/ksmbd/smb2pdu.c",
                        "fs/ksmbd/smb_common.c",
                        "fs/ksmbd/smb_common.h"
                    ],
                    "versions": [
                        {
                            "version": "51a8534c0f35c0401e45f1055f914729cad98bf9",
                            "lessThan": "921536046bd165efeb07beef5630aff35cd6a489",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0b3ec5671ac06829ccebdaeec05acedfec327f42",
                            "lessThan": "a8334a0c535d0f0b4d64926c8fe0922ed98f7d43",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cc32cd98a0aee4cc3eb611cbce11795b1aaa738a",
                            "lessThan": "99a51c673b1d2d0b5a972353401b77612d9cc713",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "39b291b86b5988bf8753c3874d5c773399d09b96",
                            "lessThan": "dc8289f912387c3bcfbc5d2db29c8947fa207c11",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ksmbd/server.c",
                        "fs/ksmbd/smb2pdu.c",
                        "fs/ksmbd/smb_common.c",
                        "fs/ksmbd/smb_common.h"
                    ],
                    "versions": [
                        {
                            "version": "5.15.105",
                            "lessThan": "5.15.145",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.22",
                            "lessThan": "6.1.24",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2.9",
                            "lessThan": "6.2.11",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15.105",
                                    "versionEndExcluding": "5.15.145"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1.22",
                                    "versionEndExcluding": "6.1.24"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2.9",
                                    "versionEndExcluding": "6.2.11"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/921536046bd165efeb07beef5630aff35cd6a489"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a8334a0c535d0f0b4d64926c8fe0922ed98f7d43"
                },
                {
                    "url": "https://git.kernel.org/stable/c/99a51c673b1d2d0b5a972353401b77612d9cc713"
                },
                {
                    "url": "https://git.kernel.org/stable/c/dc8289f912387c3bcfbc5d2db29c8947fa207c11"
                }
            ],
            "title": "ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}