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CVE-2026-23318— ALSA: usb-audio: Use correct version for UAC3 header validation

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UAC3 AC头描述符验证器使用了错误的协议版本，可能导致越界读取。

AI Predicted 7.4 Difficulty: Easy EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 22

VendorProduct Version RangeStatus
Linux Linux 57f8770620e9b51c61089751f0b5ad3dbe376ff2< 82a7d0a1b88798de1a609130080ce0c65dd869e9 affected
57f8770620e9b51c61089751f0b5ad3dbe376ff2< 8307d93e63d5f54ef10412d4db2dd551e920dee4 affected
57f8770620e9b51c61089751f0b5ad3dbe376ff2< 0dcd1ed96c03459cf14706885c9dd3c1fd8bd29f affected
57f8770620e9b51c61089751f0b5ad3dbe376ff2< a0c6ae2ea84528f198bf7fd0117f12fd0cf6d7cc affected
57f8770620e9b51c61089751f0b5ad3dbe376ff2< d3904ca40515272681ae61ad6f561c24f190957f affected
57f8770620e9b51c61089751f0b5ad3dbe376ff2< 1e5753ff4c2e86aa88516f97a224c90a3d0b133e affected
57f8770620e9b51c61089751f0b5ad3dbe376ff2< 499ffd15b00dc91ac95c28f76959dfb5cdcc84d5 affected
57f8770620e9b51c61089751f0b5ad3dbe376ff2< 54f9d645a5453d0bfece0c465d34aaf072ea99fa affected
… +14 more rows
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I. Basic Information for CVE-2026-23318

Vulnerability Information
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Vulnerability Title
ALSA: usb-audio: Use correct version for UAC3 header validation
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Use correct version for UAC3 header validation The entry of the validators table for UAC3 AC header descriptor is defined with the wrong protocol version UAC_VERSION_2, while it should have been UAC_VERSION_3. This results in the validator never matching for actual UAC3 devices (protocol == UAC_VERSION_3), causing their header descriptors to bypass validation entirely. A malicious USB device presenting a truncated UAC3 header could exploit this to cause out-of-bounds reads when the driver later accesses unvalidated descriptor fields. The bug was introduced in the same commit as the recently fixed UAC3 feature unit sub-type typo, and appears to be from the same copy-paste error when the UAC3 section was created from the UAC2 section.
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UAC3 AC头描述符验证器使用了错误的协议版本，可能导致越界读取。
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 57f8770620e9b51c61089751f0b5ad3dbe376ff2 ~ 82a7d0a1b88798de1a609130080ce0c65dd869e9 -
Linux Linux 5.4 -

II. Public POCs for CVE-2026-23318

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III. Intelligence Information for CVE-2026-23318

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Patches & Fixes for CVE-2026-23318 (6)

Same Patch Batch · Linux · 2026-03-25 · 116 CVEs total

CVE-2026-23395 8.8 HIGH Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ
CVE-2026-31788 8.2 HIGH xen/privcmd: restrict usage in unprivileged domU
CVE-2026-23280 7.8 HIGH accel/amdxdna: Prevent ubuf size overflow
CVE-2026-23317 7.8 HIGH drm/vmwgfx: Return the correct value in vmw_translate_ptr functions
CVE-2026-23393 7.8 HIGH bridge: cfm: Fix race condition in peer_mep deletion
CVE-2026-23392 7.8 HIGH netfilter: nf_tables: release flowtable after rcu grace period on error
CVE-2026-23391 7.8 HIGH netfilter: xt_CT: drop pending enqueued packets on template removal
CVE-2026-23340 7.8 HIGH net: sched: avoid qdisc_reset_all_tx_gt() vs dequeue race for lockless qdiscs
CVE-2026-23306 7.8 HIGH scsi: pm8001: Fix use-after-free in pm8001_queue_command()
CVE-2026-23372 7.8 HIGH nfc: rawsock: cancel tx_work before socket teardown
CVE-2026-23288 7.8 HIGH accel/amdxdna: Fix out-of-bounds memset in command slot handling
CVE-2026-23378 7.8 HIGH net/sched: act_ife: Fix metalist update behavior
CVE-2026-23336 7.8 HIGH wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
CVE-2026-23351 7.8 HIGH netfilter: nft_set_pipapo: split gc into unlink and reclaim phase
CVE-2026-23383 7.8 HIGH bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing
CVE-2026-23350 7.8 HIGH drm/xe/queue: Call fini on exec queue creation fail
CVE-2026-23364 7.4 HIGH ksmbd: Compare MACs in constant time
CVE-2026-23294 7.0 HIGH bpf: Fix race in devmap on PREEMPT_RT
CVE-2026-23358 drm/amdgpu: Fix error handling in slot reset
CVE-2026-23357 can: mcp251x: fix deadlock in error path of mcp251x_open

Showing top 20 of 116 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23318

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