CVE-2025-68786— ksmbd: skip lock-range check on equal size to avoid size==0 underflow
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 12
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | f44158485826c076335d6860d35872271a83791d< 52fcbb92e0d3acfd1448b2a43b6595d540da5295 | affected |
f44158485826c076335d6860d35872271a83791d< da29cd197246c85c0473259f1cad897d9d28faea | affected | ||
f44158485826c076335d6860d35872271a83791d< a6f4cfa3783804336491e0edcb250c25f9b59d33 | affected | ||
f44158485826c076335d6860d35872271a83791d< 571204e4758a528fbd67330bd4b0dfbdafb33dd8 | affected | ||
f44158485826c076335d6860d35872271a83791d< 5d510ac31626ed157d2182149559430350cf2104 | affected | ||
5.15 | affected | ||
< 5.15 | unaffected | ||
6.1.160≤ 6.1.* | unaffected | ||
| … +4 more rows | |||
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2025-68786
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View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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: skip lock-range check on equal size to avoid size==0 underflow
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: skip lock-range check on equal size to avoid size==0 underflow When size equals the current i_size (including 0), the code used to call check_lock_range(filp, i_size, size - 1, WRITE), which computes `size - 1` and can underflow for size==0. Skip the equal case.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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中当size等于i_size时进行锁范围检查可能导致整数下溢。
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-2025-68786
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2025-68786
请登录查看更多情报信息。
Same Patch Batch · Linux · 2026-01-13 · 93 CVEs total
| CVE-2025-68811 | 9.8 CRITICAL | svcrdma: use rc_pageoff for memcpy byte offset |
| CVE-2025-68794 | 9.8 CRITICAL | iomap: adjust read range correctly for non-block-aligned positions |
| CVE-2025-68817 | 9.8 CRITICAL | ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency |
| CVE-2025-68775 | 9.8 CRITICAL | net/handshake: duplicate handshake cancellations leak socket |
| CVE-2025-71068 | 9.8 CRITICAL | svcrdma: bound check rq_pages index in inline path |
| CVE-2025-71095 | 9.1 CRITICAL | net: stmmac: fix the crash issue for zero copy XDP_TX action |
| CVE-2025-68809 | 9.1 CRITICAL | ksmbd: vfs: fix race on m_flags in vfs_cache |
| CVE-2025-71093 | 9.1 CRITICAL | e1000: fix OOB in e1000_tbi_should_accept() |
| CVE-2025-68818 | 8.8 HIGH | scsi: Revert "scsi: qla2xxx: Perform lockless command completion in abort path" |
| CVE-2025-71072 | 8.2 HIGH | shmem: fix recovery on rename failures |
| CVE-2025-68799 | 8.1 HIGH | caif: fix integer underflow in cffrml_receive() |
| CVE-2025-68803 | 8.0 HIGH | NFSD: NFSv4 file creation neglects setting ACL |
| CVE-2025-68795 | 7.8 HIGH | ethtool: Avoid overflowing userspace buffer on stats query |
| CVE-2025-68793 | 7.8 HIGH | drm/amdgpu: fix a job->pasid access race in gpu recovery |
| CVE-2025-68792 | 7.8 HIGH | tpm2-sessions: Fix out of range indexing in name_size |
| CVE-2025-68801 | 7.8 HIGH | mlxsw: spectrum_router: Fix neighbour use-after-free |
| CVE-2025-71078 | 7.8 HIGH | powerpc/64s/slb: Fix SLB multihit issue during SLB preload |
| CVE-2025-68805 | 7.8 HIGH | fuse: fix io-uring list corruption for terminated non-committed requests |
| CVE-2025-68808 | 7.8 HIGH | media: vidtv: initialize local pointers upon transfer of memory ownership |
| CVE-2025-68810 | 7.8 HIGH | KVM: Disallow toggling KVM_MEM_GUEST_MEMFD on an existing memslot |
Showing top 20 of 93 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-68450
btrfs: free mapping node on duplicate reloc root insert - CVE-2026-68449
ata: sata_dwc_460ex: fix infinite loop in NCQ tag completion - CVE-2026-68448
ovl: check access to copy_file_range source with src mounter - CVE-2026-68447
drm/amdkfd: clamp v9 CRIU control stack checkpoint copy to B - CVE-2026-68446
drm/vmwgfx: Validate vmw_surface_metadata::array_size
Same vendor: Linux
- CVE-2026-68450
btrfs: free mapping node on duplicate reloc root insert - CVE-2026-68449
ata: sata_dwc_460ex: fix infinite loop in NCQ tag completion - CVE-2026-68448
ovl: check access to copy_file_range source with src mounter - CVE-2026-68447
drm/amdkfd: clamp v9 CRIU control stack checkpoint copy to B - CVE-2026-68446
drm/vmwgfx: Validate vmw_surface_metadata::array_size
V. Comments for CVE-2025-68786
No comments yet