CVE-2025-21994— ksmbd: fix incorrect validation for num_aces field of smb_acl
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2025-21994
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
ksmbd: fix incorrect validation for num_aces field of smb_acl
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix incorrect validation for num_aces field of smb_acl parse_dcal() validate num_aces to allocate posix_ace_state_array. if (num_aces > ULONG_MAX / sizeof(struct smb_ace *)) It is an incorrect validation that we can create an array of size ULONG_MAX. smb_acl has ->size field to calculate actual number of aces in request buffer size. Use this to check invalid num_aces.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ksmbd模块对smb_acl的num_aces字段验证不正确，可能导致内存分配问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-21994
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2025-21994
请登录查看更多情报信息。
Same Patch Batch · Linux · 2025-04-02 · 8 CVEs total
| CVE-2025-21993 | iscsi_ibft: Fix UBSAN shift-out-of-bounds warning in ibft_attr_show_nic() | |
| CVE-2025-21992 | HID: ignore non-functional sensor in HP 5MP Camera | |
| CVE-2025-21991 | x86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes | |
| CVE-2025-21990 | drm/amdgpu: NULL-check BO's backing store when determining GFX12 PTE flags | |
| CVE-2025-21989 | drm/amd/display: fix missing .is_two_pixels_per_container | |
| CVE-2025-21988 | fs/netfs/read_collect: add to next->prev_donated | |
| CVE-2025-21987 | drm/amdgpu: init return value in amdgpu_ttm_clear_buffer |
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2025-21994
No comments yet