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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2025-40085— ALSA: usb-audio: Fix NULL pointer deference in try_to_register_card

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，该漏洞源于未检查usb_ifnum_to_if返回值，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P10

Affected Version Matrix 19

VendorProduct Version RangeStatus
Linux Linux 28787ff9fbeaf57684eb64cc33e2ec8ceedf21b5< 736159f7b296d7a95f7208eb4799639b1f8b16a0 affected
39efc9c8a973ddff5918191525d1679d0fb368ea< 8d19a7ab28c7b9c207db5c5282afa8cc8595bcdb affected
39efc9c8a973ddff5918191525d1679d0fb368ea< 576312eb436326b44b7010f4d9ae2b698df075ea affected
39efc9c8a973ddff5918191525d1679d0fb368ea< bba7208765d26e5e36b87f21dacc2780b064f41f affected
39efc9c8a973ddff5918191525d1679d0fb368ea< 8503ac1a62075a085402e42a386b5c627c821a51 affected
39efc9c8a973ddff5918191525d1679d0fb368ea< 28412b489b088fb88dff488305fd4e56bd47f6e4 affected
9d4f4dc3cd38e412c29a7626489fe48b79ebbf6c affected
52076a41c128146c9df4a157e972cb17019313b1 affected
… +11 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2025-40085

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
ALSA: usb-audio: Fix NULL pointer deference in try_to_register_card
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix NULL pointer deference in try_to_register_card In try_to_register_card(), the return value of usb_ifnum_to_if() is passed directly to usb_interface_claimed() without a NULL check, which will lead to a NULL pointer dereference when creating an invalid USB audio device. Fix this by adding a check to ensure the interface pointer is valid before passing it to usb_interface_claimed().
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，该漏洞源于未检查usb_ifnum_to_if返回值，可能导致空指针取消引用。
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 28787ff9fbeaf57684eb64cc33e2ec8ceedf21b5 ~ 736159f7b296d7a95f7208eb4799639b1f8b16a0 -
Linux Linux 6.1 -

II. Public POCs for CVE-2025-40085

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-40085

请登录查看更多情报信息。

Patches & Fixes for CVE-2025-40085 (6)

Same Patch Batch · Linux · 2025-10-29 · 4 CVEs total

CVE-2023-7324 8.1 HIGH scsi: ses: Fix possible addl_desc_ptr out-of-bounds accesses
CVE-2025-40084 7.1 HIGH ksmbd: transport_ipc: validate payload size before reading handle
CVE-2025-40083 net/sched: sch_qfq: Fix null-deref in agg_dequeue

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40085

No comments yet

Leave a comment