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CVE-2025-71073— Input: lkkbd - disable pending work before freeing device

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，该漏洞源于释放设备前未禁用待处理工作，可能导致释放后重用。

AI Predicted 4.9 Difficulty: Hard EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3a7cd1397c209076c371d53bf39a55c138f62342 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< cffc4e29b1e2d44ab094cf142d7c461ff09b9104 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< e58c88f0cb2d8ed89de78f6f17409d29cfab6c5c affected
2.6.12 affected
< 2.6.12 unaffected
6.12.64≤ 6.12.* unaffected
6.18.3≤ 6.18.* unaffected
6.19≤ * unaffected
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I. Basic Information for CVE-2025-71073

Vulnerability Information
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Vulnerability Title
Input: lkkbd - disable pending work before freeing device
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Input: lkkbd - disable pending work before freeing device lkkbd_interrupt() schedules lk->tq via schedule_work(), and the work handler lkkbd_reinit() dereferences the lkkbd structure and its serio/input_dev fields. lkkbd_disconnect() and error paths in lkkbd_connect() free the lkkbd structure without preventing the reinit work from being queued again until serio_close() returns. This can allow the work handler to run after the structure has been freed, leading to a potential use-after-free. Use disable_work_sync() instead of cancel_work_sync() to ensure the reinit work cannot be re-queued, and call it both in lkkbd_disconnect() and in lkkbd_connect() error paths after serio_open().
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，该漏洞源于释放设备前未禁用待处理工作，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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 3a7cd1397c209076c371d53bf39a55c138f62342 -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2025-71073

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III. Intelligence Information for CVE-2025-71073

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Same Patch Batch · Linux · 2026-01-13 · 93 CVEs total

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-2025-68817 9.8 CRITICAL ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency
CVE-2025-68794 9.8 CRITICAL iomap: adjust read range correctly for non-block-aligned positions
CVE-2025-68811 9.8 CRITICAL svcrdma: use rc_pageoff for memcpy byte offset
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-2025-68819 7.8 HIGH media: dvb-usb: dtv5100: fix out-of-bounds in dtv5100_i2c_msg()
CVE-2025-68815 7.8 HIGH net/sched: ets: Remove drr class from the active list if it changes to strict
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
CVE-2025-68792 7.8 HIGH tpm2-sessions: Fix out of range indexing in name_size
CVE-2025-68793 7.8 HIGH drm/amdgpu: fix a job->pasid access race in gpu recovery
CVE-2025-71074 7.8 HIGH functionfs: fix the open/removal races
CVE-2025-68795 7.8 HIGH ethtool: Avoid overflowing userspace buffer on stats query

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-2025-71073

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