Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-89741— Revert "media: v4l2-dev: fix error handling in __video_register_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.

在 Linux 内核中，以下漏洞已得到修复： 回滚“media: v4l2-dev: 修复 __video_register_device() 中的错误处理” 此提交回滚了 commit 2a934fdb01db6458288fc9386d3d8ceba6dd551。 该补丁的初衷是好的，但实际上并不可行。 其思路是：当 失败时，必须调用 以通过引用计数机制释放资源。 然而，V4L2 API 规定：如果 失败，调用方必须调用 ，该函数会对 结构体执行 操作。 但此时 已经释放了该结构体，因此会导致双重释放（doub

AI Predicted 5.5 Difficulty: Hard

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 23

VendorProduct Version RangeStatus
Linux Linux 2429bb9fad88c8fa84c4956b0a21cf5afe5e92b7< 712ca1cf756de2557a116e0df55791bac0c9f99e affected
2a934fdb01db6458288fc9386d3d8ceba6dd551a< aad08b5f67d2a8116e1a00bce2611c1513b10bce affected
2a934fdb01db6458288fc9386d3d8ceba6dd551a< ce792b94e03882108019ba996c1a7c4d4e09be2c affected
2a934fdb01db6458288fc9386d3d8ceba6dd551a< e7600f5cee5de14065f950807931d6e6d40fb2d7 affected
ee141706e701356dda41c6fed9ee18bf427c28e3 affected
e5c8e62ae551e0ad2e15412aa0c57c2856d59677 affected
8b451a9a46f2bfc510e6d5c2492df91647586184 affected
b6be1f5633eae200af2527e9eeb7f51be5739b0f affected
… +15 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-89741

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Revert "media: v4l2-dev: fix error handling in __video_register_device()"
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Revert "media: v4l2-dev: fix error handling in __video_register_device()" This reverts commit 2a934fdb01db6458288fc9386d3d8ceba6dd551a. The intentions of that patch were good, but it doesn't work. The idea is that if device_register fails, you have to do a put_device to let the ref counter release resources. However, the V4L2 API says that if video_register_device() fails, then you have to call video_device_release(), which kfree()s the video_device struct. But the put_device() will already have freed the struct, so you end up in a double-free scenario. There is not really a good way of fixing this without breaking video_register_device() into two parts, one that initializes everything, and one that does the actual device_register, and then converting all V4L2 drivers to this new model. That is a massive job, and it is very unlikely that device_register will fail. So rather than ending up in a double-free scenario, just revert this patch, and in that case we'll have a small memory leak. Which is a lot more robust.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 2429bb9fad88c8fa84c4956b0a21cf5afe5e92b7 ~ 712ca1cf756de2557a116e0df55791bac0c9f99e -
Linux Linux 6.16 -

II. Public POCs for CVE-2026-89741

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-89741

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-89741 (4)

Same Patch Batch · Linux · 2026-09-11 · 431 CVEs total

CVE-2026-89491 ocfs2: cluster: don't sleep while holding o2hb_live_lock in o2hb_region_pin()
CVE-2026-89477 sctp: fix NULL deref on untransmitted RECONF completion
CVE-2026-89478 sctp: drop a chunk if its transport was removed
CVE-2026-89479 sctp: stop processing a packet once its association is deleted
CVE-2026-89480 nvme-tcp: reject a read that transferred too few bytes
CVE-2026-89482 nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone
CVE-2026-89481 nvme-tcp: fix host memory disclosure on R2T for a read command
CVE-2026-89483 nvme: zero the discard fallback page
CVE-2026-89484 lockd: fix NULL dereference on lockowner allocation failure
CVE-2026-89485 lockd: pin next file across nlm_inspect_file lock-drop
CVE-2026-89486 ipmi: Fix use-after-free of cmd_rcvr in _ipmi_destroy_user()
CVE-2026-89487 openvswitch: only skb_tx_error() a packet we are about to drop
CVE-2026-89488 openvswitch: Fix CT limit teardown use-after-free
CVE-2026-89489 openrisc: fix arbitrary kernel memory access via or1k_atomic syscall
CVE-2026-89500 ring-buffer: Make cpu_buffer::free_page a buffer_data_read_page
CVE-2026-89497 orangefs: skip leading spaces before parsing client debug masks
CVE-2026-89498 orangefs: fix double-free of trailer_buf on readdir copy failure
CVE-2026-89499 ring-buffer: Stop remote reader update when page swap fails
CVE-2026-89496 ocfs2: always run deallocs on copy-on-write completion
CVE-2026-89501 ring-buffer: Hold cpu_buffer::lock when resizing a subbuf

Showing top 20 of 431 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-89741

No comments yet

Leave a comment