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CVE-2026-68205— media: v4l2-fwnode: Fix subdev owner overwritten in v4l2_async_register_subdev_sensor()

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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于v4l2_async_register_subdev_sensor()函数中宏展开导致传感器驱动模块所有者被覆盖为NULL，传感器模块引用计数未增加，可能导致模块被提前移除。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P11

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux aef69d54755d45edefbf347a51efd1673d7daed9< f35e85a9d919d7954d9a7752e4644c0b403ad025 affected
aef69d54755d45edefbf347a51efd1673d7daed9< c5e47cf9a6cffef73a1ed40b3648e6097aac165a affected
aef69d54755d45edefbf347a51efd1673d7daed9< 47ef04cd13d38010b580056a9d8840aaab944841 affected
aef69d54755d45edefbf347a51efd1673d7daed9< caea6bc68c925d63ca33d21b2255f47181943d61 affected
aef69d54755d45edefbf347a51efd1673d7daed9< cf9732fd6c4f2f803ccfc46d89489b6635590270 affected
aef69d54755d45edefbf347a51efd1673d7daed9< 067887ff93fddbb3a3fb84c900bc654ecfe5ba61 affected
aef69d54755d45edefbf347a51efd1673d7daed9< 06cb687a5132fcffe624c0070576ab852ac6b568 affected
4.15 affected
… +8 more rows
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I. Basic Information for CVE-2026-68205

Vulnerability Information
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Vulnerability Title
media: v4l2-fwnode: Fix subdev owner overwritten in v4l2_async_register_subdev_sensor()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: v4l2-fwnode: Fix subdev owner overwritten in v4l2_async_register_subdev_sensor() The v4l2 helper v4l2_async_register_subdev_sensor() calls v4l2_async_register_subdev(), which is a macro that expands to __v4l2_async_register_subdev(sd,THIS_MODULE). Since the macro is expanded inside v4l2-fwnode.c, THIS_MODULE resolves to the v4l2-fwnode module rather than the sensor driver module that originally set sd->owner. When v4l2-fwnode is built-in, THIS_MODULE evaluates to NULL, which then overwrites the sensor driver's owner with NULL. This causes the problem that the sensor module's reference count is never incremented during async registration, so the module can be removed while the subdevice is still in use by a notifier (e.g., a CSI-2 receiver bridge driver). Fix this by renaming v4l2_async_register_subdev_sensor() to __v4l2_async_register_subdev_sensor() with an added explicit module argument and introducing a wrapper macro: #define v4l2_async_register_subdev_sensor(sd) \ __v4l2_async_register_subdev_sensor(sd, THIS_MODULE) This ensures the sensor driver module is properly referenced even when the sensor driver does not init the owner field before calling v4l2_async_register_subdev_sensor() and prevents premature module removal.
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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于v4l2_async_register_subdev_sensor()函数中宏展开导致传感器驱动模块所有者被覆盖为NULL，传感器模块引用计数未增加，可能导致模块被提前移除。
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 aef69d54755d45edefbf347a51efd1673d7daed9 ~ f35e85a9d919d7954d9a7752e4644c0b403ad025 -
Linux Linux 4.15 -

II. Public POCs for CVE-2026-68205

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III. Intelligence Information for CVE-2026-68205

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Patches & Fixes for CVE-2026-68205 (5)

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

CVE-2026-68388 9.8 CRITICAL smb/client: handle overlapping allocated ranges in fallocate
CVE-2026-68136 9.8 CRITICAL net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68137 9.8 CRITICAL net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68144 9.8 CRITICAL phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68127 9.8 CRITICAL ila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-68154 9.8 CRITICAL libceph: reject zero bucket types in crush_decode
CVE-2026-68123 9.8 CRITICAL openvswitch: fix GSO userspace truncation underflow
CVE-2026-68156 9.8 CRITICAL libceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-68158 9.8 CRITICAL libceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-68159 9.8 CRITICAL libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-68160 9.8 CRITICAL ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68161 9.8 CRITICAL sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68117 9.8 CRITICAL tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68170 9.8 CRITICAL mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68385 9.8 CRITICAL s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68381 9.8 CRITICAL ksmbd: pin conn during async oplock break notification
CVE-2026-68302 9.8 CRITICAL amt: re-read skb header pointers after every pull
CVE-2026-68426 9.8 CRITICAL xfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-68300 9.8 CRITICAL sctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-68124 9.6 CRITICAL mctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 344 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68205

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