Answer in brief
CVE-2025-38728 records a Critical severity (CVSS 9.1) vulnerability in smb3: fix for slab out of bounds on mount to ksmbd. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC CN 4100 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC CN 4100 (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:4.18:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:4.18:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:4.18:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:4.18:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:4.18:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:4.18:rc6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:4.18:rc7:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:4.18:rc8:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=fe856be475f7cf5ffcde57341d175ce9fd09434b <9bdb8e98a0073c73ab3e6c631ec78877ceb64565 || >=fe856be475f7cf5ffcde57341d175ce9fd09434b <a0620e1525663edd8c4594f49fb75fe5be4724b0 || >=fe856be475f7cf5ffcde57341d175ce9fd09434b <8de33d4d72e8fae3502ec3850bd7b14e7c7328b6 || >=fe856be475f7cf5ffcde57341d175ce9fd09434b <a542f93a123555d09c3ce8bc947f7b56ad8e6463 || >=fe856be475f7cf5ffcde57341d175ce9fd09434b <f6eda5b0e8f8123564c5b34f5801d63243032eac || >=fe856be475f7cf5ffcde57341d175ce9fd09434b <7d34ec36abb84fdfb6632a0f2cbda90379ae21fc | 9bdb8e98a0073c73ab3e6c631ec78877ceb64565, a0620e1525663edd8c4594f49fb75fe5be4724b0, 8de33d4d72e8fae3502ec3850bd7b14e7c7328b6, a542f93a123555d09c3ce8bc947f7b56ad8e6463, f6eda5b0e8f8123564c5b34f5801d63243032eac, 7d34ec36abb84fdfb6632a0f2cbda90379ae21fc |
| Linux/Linuxgeneric | 4.18 | Not reported |
| Linux/Linuxgeneric | >=fe856be475f7cf5ffcde57341d175ce9fd09434b <248c1142f09478d6cb8151510cbf4ac2673c8ac5 || >=fe856be475f7cf5ffcde57341d175ce9fd09434b <9bdb8e98a0073c73ab3e6c631ec78877ceb64565 || >=fe856be475f7cf5ffcde57341d175ce9fd09434b <a0620e1525663edd8c4594f49fb75fe5be4724b0 || >=fe856be475f7cf5ffcde57341d175ce9fd09434b <8de33d4d72e8fae3502ec3850bd7b14e7c7328b6 || >=fe856be475f7cf5ffcde57341d175ce9fd09434b <a542f93a123555d09c3ce8bc947f7b56ad8e6463 || >=fe856be475f7cf5ffcde57341d175ce9fd09434b <f6eda5b0e8f8123564c5b34f5801d63243032eac || >=fe856be475f7cf5ffcde57341d175ce9fd09434b <7d34ec36abb84fdfb6632a0f2cbda90379ae21fc | 248c1142f09478d6cb8151510cbf4ac2673c8ac5, 9bdb8e98a0073c73ab3e6c631ec78877ceb64565, a0620e1525663edd8c4594f49fb75fe5be4724b0, 8de33d4d72e8fae3502ec3850bd7b14e7c7328b6, a542f93a123555d09c3ce8bc947f7b56ad8e6463, f6eda5b0e8f8123564c5b34f5801d63243032eac, 7d34ec36abb84fdfb6632a0f2cbda90379ae21fc |
| Siemens/SIMATIC CN 4100generic | >=0 <V5.0 | V5.0 |
Published upstream
Sep 4, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: smb3: fix for slab out of bounds on mount to ksmbd With KASAN enabled, it is possible to get a slab out of bounds during mount to ksmbd due to missing check in parse_server_interfaces() (see below): BUG: KASAN: slab-out-of-bounds in parse_server_interfaces+0x14ee/0x1880 [cifs] Read of size 4 at addr ffff8881433dba98 by task mount/9827 CPU: 5 UID: 0 PID: 9827 Comm: mount Tainted: G OE 6.16.0-rc2-kasan #2 PREEMPT(voluntary) Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE Hardware name: Dell Inc. Precision Tower 3620/0MWYPT, BIOS 2.13.1 06/14/2019 Call Trace: <TASK> dump_stack_lvl+0x9f/0xf0 print_report+0xd1/0x670 __virt_addr_valid+0x22c/0x430 ? parse_server_interfaces+0x14ee/0x1880 [cifs] ? kasan_complete_mode_report_info+0x2a/0x1f0 ? parse_server_interfaces+0x14ee/0x1880 [cifs] kasan_report+0xd6/0x110 parse_server_interfaces+0x14ee/0x1880 [cifs] __asan_report_load_n_noabort+0x13/0x20 parse_server_interfaces+0x14ee/0x1880 [cifs] ? __pfx_parse_server_interfaces+0x10/0x10 [cifs] ? trace_hardirqs_on+0x51/0x60 SMB3_request_interfaces+0x1ad/0x3f0 [cifs] ? __pfx_SMB3_request_interfaces+0x10/0x10 [cifs] ? SMB2_tcon+0x23c/0x15d0 [cifs] smb3_qfs_tcon+0x173/0x2b0 [cifs] ? __pfx_smb3_qfs_tcon+0x10/0x10 [cifs] ? cifs_get_tcon+0x105d/0x2120 [cifs] ? do_raw_spin_unlock+0x5d/0x200 ? cifs_get_tcon+0x105d/0x2120 [cifs] ? __pfx_smb3_qfs_tcon+0x10/0x10 [cifs] cifs_mount_get_tcon+0x369/0xb90 [cifs] ? dfs_cache_find+0xe7/0x150 [cifs] dfs_mount_share+0x985/0x2970 [cifs] ? check_path.constprop.0+0x28/0x50 ? save_trace+0x54/0x370 ? __pfx_dfs_mount_share+0x10/0x10 [cifs] ? __lock_acquire+0xb82/0x2ba0 ? __kasan_check_write+0x18/0x20 cifs_mount+0xbc/0x9e0 [cifs] ? __pfx_cifs_mount+0x10/0x10 [cifs] ? do_raw_spin_unlock+0x5d/0x200 ? cifs_setup_cifs_sb+0x29d/0x810 [cifs] cifs_smb3_do_mount+0x263/0x1990 [cifs]
Quoted source text, attributed separately from HOL analysis.