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CVE-2026-74497— ALSA: usb-audio: Clamp frame size in implicit-feedback mode

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snd_usb_handle_sync_urb()函数未对帧计数进行钳位，导致接收到的过大同步包帧计数超过ep->maxframesize，并传播到播放端点队列，可能导致数据包传输超出端点硬件帧限制。

CVSS 8.4 · High EPSS 0.14% · P4

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 28acb12014fb0c3e1edfdab1b1e3e266cf651550< 2d39fea6d3c19a2f5811d123114d92e3d0115fd1 affected
28acb12014fb0c3e1edfdab1b1e3e266cf651550< 09cf3dbbb4256a43feb91d2f51f274510a9ada47 affected
28acb12014fb0c3e1edfdab1b1e3e266cf651550< cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be affected
28acb12014fb0c3e1edfdab1b1e3e266cf651550< 56ac3e7c90f6b45969c3fd07a98fad760ffd6901 affected
28acb12014fb0c3e1edfdab1b1e3e266cf651550< be97fea7451d758881b95af78e900dd0d58a382a affected
28acb12014fb0c3e1edfdab1b1e3e266cf651550< 2db4535d6af79276a64449201c5be5feffb31c64 affected
28acb12014fb0c3e1edfdab1b1e3e266cf651550< 53f0aa37eb945f3c983f61d12fc35eb33debb8a9 affected
28acb12014fb0c3e1edfdab1b1e3e266cf651550< 8d7a30c50c2e58a6839634ed0acde14466d1dc61 affected
… +10 more rows
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I. Basic Information for CVE-2026-74497

Vulnerability Information
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Vulnerability Title
ALSA: usb-audio: Clamp frame size in implicit-feedback mode
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Clamp frame size in implicit-feedback mode snd_usb_handle_sync_urb() scales received sync packet sizes by the sender's stride and stores the result directly in out_packet->packet_size[i]. If a connected USB device sends an oversized sync packet, this frame count can exceed ep->maxframesize. The un-clamped frame count then propagates to the playback endpoint queue, potentially driving packet transfers beyond the endpoint's hardware frame limits. Cap the calculated frame count against ep->maxframesize in snd_usb_handle_sync_urb() to prevent oversized packets from entering the playback queue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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snd_usb_handle_sync_urb()函数未对帧计数进行钳位，导致接收到的过大同步包帧计数超过ep->maxframesize，并传播到播放端点队列，可能导致数据包传输超出端点硬件帧限制。
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 28acb12014fb0c3e1edfdab1b1e3e266cf651550 ~ 2d39fea6d3c19a2f5811d123114d92e3d0115fd1 -
Linux Linux 3.8 -

II. Public POCs for CVE-2026-74497

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III. Intelligence Information for CVE-2026-74497

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Patches & Fixes for CVE-2026-74497 (7)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72041 9.8 CRITICAL espintcp: use sk_msg_free_partial to fix partial send
CVE-2026-72477 9.8 CRITICAL fs/ntfs3: call _ntfs_bad_inode() when failing to rename
CVE-2026-72209 9.8 CRITICAL ntfs: validate attribute values on lookup
CVE-2026-72208 9.8 CRITICAL ntfs: add bounds check before accessing EA entries
CVE-2026-72206 9.8 CRITICAL ntfs: validate index block header more strictly
CVE-2026-72299 9.8 CRITICAL tipc: restrict socket queue dumps in enqueue tracepoints
CVE-2026-74434 9.8 CRITICAL rxrpc: Don't move a peeked OOB message onto the pending queue
CVE-2026-74433 9.8 CRITICAL rxrpc: Fix UAF in rxgk_issue_challenge()
CVE-2026-72473 9.8 CRITICAL xprtrdma: Decouple req recycling from RPC completion
CVE-2026-72472 9.8 CRITICAL nfs: use nfsi->rwsem to protect traversal of the file lock list
CVE-2026-74545 9.8 CRITICAL rtase: fix double free of multi-frag skb on DMA map failure
CVE-2026-72322 9.8 CRITICAL ipv6: mcast: Fix potential UAF in MLD delayed work

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74497

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