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CVE-2026-46018— ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES

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UAC2速率解析在达到MAX_NR_RATES后未停止整个解析过程，可能导致持续打印错误信息。

AI Predicted 3.3 Difficulty: Theoretical EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 22

VendorProduct Version RangeStatus
Linux Linux 4fa0e81b83503900be277e6273a79651b375e288< 5436bc1b07d4656f99412dc72871d250d7d55205 affected
4fa0e81b83503900be277e6273a79651b375e288< 0da05fedf5e1966b7e7d389866cb86fcf09f4b32 affected
4fa0e81b83503900be277e6273a79651b375e288< f14bd323eec4b4f0ef662520ec852e593ece1d4c affected
4fa0e81b83503900be277e6273a79651b375e288< ab5ba9fd138758ddc50222264ff246b31e397abf affected
4fa0e81b83503900be277e6273a79651b375e288< ba036305323814ec1f8655313b2fa6a0f7048716 affected
4fa0e81b83503900be277e6273a79651b375e288< 4d7893a137eadb6163ea4298bf67d74b811d76ef affected
4fa0e81b83503900be277e6273a79651b375e288< a0b78639ef09b2e77974a3de3b1c07f6de3c5e56 affected
4fa0e81b83503900be277e6273a79651b375e288< 3c318f97dcc50b2e0556a1813bd6958678e881fd affected
… +14 more rows
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I. Basic Information for CVE-2026-46018

Vulnerability Information
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Vulnerability Title
ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES parse_uac2_sample_rate_range() caps the number of enumerated rates at MAX_NR_RATES, but it only breaks out of the current rate loop. A malformed UAC2 RANGE response with additional triplets continues parsing the remaining triplets and repeatedly prints "invalid uac2 rates" while probe still holds register_mutex. Stop the whole parse once the cap is reached and return the number of rates collected so far.
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UAC2速率解析在达到MAX_NR_RATES后未停止整个解析过程，可能导致持续打印错误信息。
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 4fa0e81b83503900be277e6273a79651b375e288 ~ 5436bc1b07d4656f99412dc72871d250d7d55205 -
Linux Linux 3.3 -

II. Public POCs for CVE-2026-46018

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III. Intelligence Information for CVE-2026-46018

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Patches & Fixes for CVE-2026-46018 (8)

Same Patch Batch · Linux · 2026-05-27 · 275 CVEs total

CVE-2026-45972 9.8 CRITICAL smb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-46056 8.8 HIGH Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
CVE-2025-71311 8.2 HIGH fs/ntfs3: Initialize new folios before use
CVE-2026-45843 8.2 HIGH slip: bound decode() reads against the compressed packet length
CVE-2026-46037 8.2 HIGH ipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-46099 8.1 HIGH net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-46010 8.1 HIGH rxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-46076 7.9 HIGH KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-45909 7.8 HIGH clk: mediatek: Drop __initconst from gates
CVE-2026-46015 7.8 HIGH tcp: call sk_data_ready() after listener migration
CVE-2026-46036 7.8 HIGH vfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex
CVE-2026-46062 7.8 HIGH ntfs3: fix integer overflow in run_unpack() volume boundary check
CVE-2026-46065 7.8 HIGH fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
CVE-2026-45878 7.8 HIGH drm/amdkfd: Fix watch_id bounds checking in debug address watch v2
CVE-2026-45894 7.8 HIGH iommu/vt-d: Clear Present bit before tearing down PASID entry

Showing top 20 of 275 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46018

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