CVE-2023-54203 - Vulnerability Details

Vendors	Products
Linux	Linux Kernel

Link	Providers
https://git.kernel.org/stable/c/921536046bd165efeb07beef5630aff35cd6a489
https://git.kernel.org/stable/c/99a51c673b1d2d0b5a972353401b77612d9cc713
https://git.kernel.org/stable/c/a8334a0c535d0f0b4d64926c8fe0922ed98f7d43
https://git.kernel.org/stable/c/dc8289f912387c3bcfbc5d2db29c8947fa207c11

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr When smb1 mount fails, KASAN detect slab-out-of-bounds in init_smb2_rsp_hdr like the following one. For smb1 negotiate(56bytes) , init_smb2_rsp_hdr() for smb2 is called. The issue occurs while handling smb1 negotiate as smb2 server operations. Add smb server operations for smb1 (get_cmd_val, init_rsp_hdr, allocate_rsp_buf, check_user_session) to handle smb1 negotiate so that smb2 server operation does not handle it. [ 411.400423] CIFS: VFS: Use of the less secure dialect vers=1.0 is not recommended unless required for access to very old servers [ 411.400452] CIFS: Attempting to mount \\192.168.45.139\homes [ 411.479312] ksmbd: init_smb2_rsp_hdr : 492 [ 411.479323] ================================================================== [ 411.479327] BUG: KASAN: slab-out-of-bounds in init_smb2_rsp_hdr+0x1e2/0x1f4 [ksmbd] [ 411.479369] Read of size 16 at addr ffff888488ed0734 by task kworker/14:1/199 [ 411.479379] CPU: 14 PID: 199 Comm: kworker/14:1 Tainted: G OE 6.1.21 #3 [ 411.479386] Hardware name: ASUSTeK COMPUTER INC. Z10PA-D8 Series/Z10PA-D8 Series, BIOS 3801 08/23/2019 [ 411.479390] Workqueue: ksmbd-io handle_ksmbd_work [ksmbd] [ 411.479425] Call Trace: [ 411.479428] <TASK> [ 411.479432] dump_stack_lvl+0x49/0x63 [ 411.479444] print_report+0x171/0x4a8 [ 411.479452] ? kasan_complete_mode_report_info+0x3c/0x200 [ 411.479463] ? init_smb2_rsp_hdr+0x1e2/0x1f4 [ksmbd] [ 411.479497] kasan_report+0xb4/0x130 [ 411.479503] ? init_smb2_rsp_hdr+0x1e2/0x1f4 [ksmbd] [ 411.479537] kasan_check_range+0x149/0x1e0 [ 411.479543] memcpy+0x24/0x70 [ 411.479550] init_smb2_rsp_hdr+0x1e2/0x1f4 [ksmbd] [ 411.479585] handle_ksmbd_work+0x109/0x760 [ksmbd] [ 411.479616] ? _raw_spin_unlock_irqrestore+0x50/0x50 [ 411.479624] ? smb3_encrypt_resp+0x340/0x340 [ksmbd] [ 411.479656] process_one_work+0x49c/0x790 [ 411.479667] worker_thread+0x2b1/0x6e0 [ 411.479674] ? process_one_work+0x790/0x790 [ 411.479680] kthread+0x177/0x1b0 [ 411.479686] ? kthread_complete_and_exit+0x30/0x30 [ 411.479692] ret_from_fork+0x22/0x30 [ 411.479702] </TASK>
Title		ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/921536046bd165efeb07beef5630aff35cd6a489 https://git.kernel.org/stable/c/99a51c673b1d2d0b5a972353401b77612d9cc713 https://git.kernel.org/stable/c/a8334a0c535d0f0b4d64926c8fe0922ed98f7d43 https://git.kernel.org/stable/c/dc8289f912387c3bcfbc5d2db29c8947fa207c11

{"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": "2025-12-30T12:09:07.538Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-30T12:09:07.538Z"}, "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"}}}}

{"cveTags": [], "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>"}], "id": "CVE-2023-54203", "lastModified": "2025-12-30T13:16:08.420", "metrics": {}, "published": "2025-12-30T13:16:08.420", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/921536046bd165efeb07beef5630aff35cd6a489"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/99a51c673b1d2d0b5a972353401b77612d9cc713"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a8334a0c535d0f0b4d64926c8fe0922ed98f7d43"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dc8289f912387c3bcfbc5d2db29c8947fa207c11"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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