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CVE-2025-38249— ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()

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snd_usb_get_audioformat_uac3中越界读取。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 9a2fe9b801f585baccf8352d82839dcd54b300cf< 24ff7d465c4284529bbfa207757bffb6f44b6403 affected
9a2fe9b801f585baccf8352d82839dcd54b300cf< 2dc1c3edf67abd30c757f8054a5da61927cdda21 affected
9a2fe9b801f585baccf8352d82839dcd54b300cf< c3fb926abe90d86f5e3055e0035f04d9892a118b affected
9a2fe9b801f585baccf8352d82839dcd54b300cf< 6eb211788e1370af52a245d4d7da35c374c7b401 affected
9a2fe9b801f585baccf8352d82839dcd54b300cf< 74fcb3852a2f579151ce80b9ed96cd916ba0d5d8 affected
9a2fe9b801f585baccf8352d82839dcd54b300cf< 0ee87c2814deb5e42921281116ac3abcb326880b affected
9a2fe9b801f585baccf8352d82839dcd54b300cf< 11e740dc1a2c8590eb7074b5c4ab921bb6224c36 affected
9a2fe9b801f585baccf8352d82839dcd54b300cf< fb4e2a6e8f28a3c0ad382e363aeb9cd822007b8a affected
… +10 more rows
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I. Basic Information for CVE-2025-38249

Vulnerability Information
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Vulnerability Title
ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3() In snd_usb_get_audioformat_uac3(), the length value returned from snd_usb_ctl_msg() is used directly for memory allocation without validation. This length is controlled by the USB device. The allocated buffer is cast to a uac3_cluster_header_descriptor and its fields are accessed without verifying that the buffer is large enough. If the device returns a smaller than expected length, this leads to an out-of-bounds read. Add a length check to ensure the buffer is large enough for uac3_cluster_header_descriptor.
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snd_usb_get_audioformat_uac3中越界读取。
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 9a2fe9b801f585baccf8352d82839dcd54b300cf ~ 24ff7d465c4284529bbfa207757bffb6f44b6403 -
Linux Linux 4.17 -

II. Public POCs for CVE-2025-38249

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III. Intelligence Information for CVE-2025-38249

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Same Patch Batch · Linux · 2025-07-09 · 26 CVEs total

CVE-2025-38264 9.8 CRITICAL nvme-tcp: sanitize request list handling
CVE-2025-38246 9.8 CRITICAL bnxt: properly flush XDP redirect lists
CVE-2025-38238 8.8 HIGH scsi: fnic: Fix crash in fnic_wq_cmpl_handler when FDMI times out
CVE-2025-38253 8.8 HIGH HID: wacom: fix crash in wacom_aes_battery_handler()
CVE-2025-38242 7.8 HIGH mm: userfaultfd: fix race of userfaultfd_move and swap cache
CVE-2025-38261 7.8 HIGH riscv: save the SR_SUM status over switches
CVE-2025-38262 7.8 HIGH tty: serial: uartlite: register uart driver in init
CVE-2025-38248 7.8 HIGH bridge: mcast: Fix use-after-free during router port configuration
CVE-2025-38250 7.8 HIGH Bluetooth: hci_core: Fix use-after-free in vhci_flush()
CVE-2025-38252 7.8 HIGH cxl/ras: Fix CPER handler device confusion
CVE-2025-38244 7.5 HIGH smb: client: fix potential deadlock when reconnecting channels
CVE-2025-38239 7.3 HIGH scsi: megaraid_sas: Fix invalid node index
CVE-2025-38257 7.3 HIGH s390/pkey: Prevent overflow in size calculation for memdup_user()
CVE-2025-38251 atm: clip: prevent NULL deref in clip_push()
CVE-2025-38254 drm/amd/display: Add sanity checks for drm_edid_raw()
CVE-2025-38255 lib/group_cpus: fix NULL pointer dereference from group_cpus_evenly()
CVE-2025-38256 io_uring/rsrc: fix folio unpinning
CVE-2025-38247 userns and mnt_idmap leak in open_tree_attr(2)
CVE-2025-38258 mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write
CVE-2025-38259 ASoC: codecs: wcd9335: Fix missing free of regulator supplies

Showing top 20 of 26 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38249

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