CVE-2023-54203
published 2025-12-30CVE-2023-54203: 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…
PriorityP354critical9.1CVSS 3.1
AVNACLPRNUINSUCHINAH
EPSS
0.55%
45.6th percentile
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]
[ 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/
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | — | — |
| linux | linux | >= 0b3ec5671ac06829ccebdaeec05acedfec327f42 < a8334a0c535d0f0b4d64926c8fe0922ed98f7d43 | a8334a0c535d0f0b4d64926c8fe0922ed98f7d43 |
| linux | linux | >= 39b291b86b5988bf8753c3874d5c773399d09b96 < dc8289f912387c3bcfbc5d2db29c8947fa207c11 | dc8289f912387c3bcfbc5d2db29c8947fa207c11 |
| linux | linux | >= 5.15.105 < 5.15.145 | 5.15.145 |
| linux | linux | >= 51a8534c0f35c0401e45f1055f914729cad98bf9 < 921536046bd165efeb07beef5630aff35cd6a489 | 921536046bd165efeb07beef5630aff35cd6a489 |
| linux | linux | >= 6.1.22 < 6.1.24 | 6.1.24 |
| linux | linux | >= 6.2.9 < 6.2.11 | 6.2.11 |
| linux | linux | >= cc32cd98a0aee4cc3eb611cbce11795b1aaa738a < 99a51c673b1d2d0b5a972353401b77612d9cc713 | 99a51c673b1d2d0b5a972353401b77612d9cc713 |
| linux | linux_kernel | >= 0 < 5.15.0-102.112 | 5.15.0-102.112 |
| linux | linux_kernel | >= 5.15.105 < 5.15.145 | 5.15.145 |
| linux | linux_kernel | >= 6.1.22 < 6.1.24 | 6.1.24 |
| linux | linux_kernel | >= 6.2.9 < 6.2.11 | 6.2.11 |
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Red Hat
kernel: ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr
vendor_redhat·2025-12-30
CVE-2023-54203 kernel: ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr
kernel: ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr
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
[ 411.4
Debian
CVE-2023-54203: linux - In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix ...
vendor_debian·2023
CVE-2023-54203 [LOW] CVE-2023-54203: linux - In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix ...
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] ========
OSV
ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr
osv·2025-12-30
CVE-2023-54203 ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr
ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr
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
GHSA
GHSA-92h7-9rvh-996h: 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
ghsa_unreviewed·2025-12-30
CVE-2023-54203 GHSA-92h7-9rvh-996h: 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
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] =====
OSV
CVE-2023-54203: 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 de
osv·2025-12-30
CVE-2023-54203 CVE-2023-54203: 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 de
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] ========
No detection rules found.
No public exploits indexed.
Wiz
CVE-2023-54203 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz
CVE-2023-54203 CVE-2023-54203 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2023-54203 :
Linux Ubuntu vulnerability analysis and mitigation
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 \192.168.45.13
Bugzilla
CVE-2023-54203 kernel: ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr
bugzilla·2025-12-30
CVE-2023-54203 CVE-2023-54203 kernel: ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr
CVE-2023-54203 kernel: ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr
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
2025-12-30
Published