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CVE-2025-68817— ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于在高并发下树连接对象可能被提前释放，可能导致释放后重用。

CVSS 9.8 · Critical EPSS 0.45% · P38

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux dd45db4d9bbc8f122a9b4db5ce94ae29fcf03d3c< 446beed646b2e426dd53d27358365f8678e1dd01 affected
7b58ee8d0b91359554cf219cd4f33872ea2afd66< d092de8a26c952379ded8e6b0bda31d89befac1a affected
33b235a6e6ebe0f05f3586a71e8d281d00f71e2e< d64977495e44855f2b28d8ce56107c963a7a50e4 affected
33b235a6e6ebe0f05f3586a71e8d281d00f71e2e< 21a3d01fc6db5129f81edb0ab7cb94fd758bcbea affected
33b235a6e6ebe0f05f3586a71e8d281d00f71e2e< 063cbbc6f595ea36ad146e1b7d2af820894beb21 affected
33b235a6e6ebe0f05f3586a71e8d281d00f71e2e< b39a1833cc4a2755b02603eec3a71a85e9dff926 affected
5.15.145< 5.15.199 affected
6.1.71< 6.1.160 affected
… +8 more rows
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I. Basic Information for CVE-2025-68817

Vulnerability Information
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Vulnerability Title
ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency Under high concurrency, A tree-connection object (tcon) is freed on a disconnect path while another path still holds a reference and later executes *_put()/write on it.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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，该漏洞源于在高并发下树连接对象可能被提前释放，可能导致释放后重用。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux dd45db4d9bbc8f122a9b4db5ce94ae29fcf03d3c ~ 446beed646b2e426dd53d27358365f8678e1dd01 -
Linux Linux 6.6 -

II. Public POCs for CVE-2025-68817

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III. Intelligence Information for CVE-2025-68817

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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-2025-71068 9.8 CRITICAL svcrdma: bound check rq_pages index in inline path
CVE-2025-68775 9.8 CRITICAL net/handshake: duplicate handshake cancellations leak socket
CVE-2025-68809 9.1 CRITICAL ksmbd: vfs: fix race on m_flags in vfs_cache
CVE-2025-71095 9.1 CRITICAL net: stmmac: fix the crash issue for zero copy XDP_TX action
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-2025-68793 7.8 HIGH drm/amdgpu: fix a job->pasid access race in gpu recovery
CVE-2025-71099 7.8 HIGH drm/xe/oa: Fix potential UAF in xe_oa_add_config_ioctl()
CVE-2025-68805 7.8 HIGH fuse: fix io-uring list corruption for terminated non-committed requests
CVE-2025-68815 7.8 HIGH net/sched: ets: Remove drr class from the active list if it changes to strict
CVE-2025-68792 7.8 HIGH tpm2-sessions: Fix out of range indexing in name_size
CVE-2025-71092 7.8 HIGH RDMA/bnxt_re: Fix OOB write in bnxt_re_copy_err_stats()
CVE-2025-68819 7.8 HIGH media: dvb-usb: dtv5100: fix out-of-bounds in dtv5100_i2c_msg()
CVE-2025-71066 7.8 HIGH net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change
CVE-2025-68822 7.8 HIGH Input: alps - fix use-after-free bugs caused by dev3_register_work

Showing top 20 of 93 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-68817

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