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CVE-2026-46146— ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()

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ALSA usb-audio中convert_chmap_v3()函数未验证cs_desc->wLength值，可能导致无限循环。

AI Predicted 5.5 Difficulty: Hard EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 29

VendorProduct Version RangeStatus
Linux Linux 786571b10b1ae6d90e1242848ce78ee7e1d493c4< 076d5d13eb9c1ad259a7f246149f6676c62285f9 affected
275e37532e8ebe25e8a4069b2d9f955bfd202a46< 316aa0b1e3c5600eae5ab876394c1ac70e6db581 affected
47ab3d820cb0a502bd0074f83bb3cf7ab5d79902< 24a40df79307ca7ca0eec0889361cf6ac146d72a affected
1034719fdefd26caeec0a44a868bb5a412c2c1a5< e0e3dcf48189603f3865f1a0b799b3b42baae96d affected
ae17b3b5e753efc239421d186cd1ff06e5ac296e< 4e0ee232ebe3df04874125d7c7f3e6c25ea5483d affected
ecfd41166b72b67d3bdeb88d224ff445f6163869< be09b47ed8677d76962e3240c145502e2ad9f3c8 affected
ecfd41166b72b67d3bdeb88d224ff445f6163869< fa5b19ce69067874b1413f3c2027563bae8c2cb3 affected
ecfd41166b72b67d3bdeb88d224ff445f6163869< 6e7247d8f5fefeceb0bb9cc80a5388a636b219cd affected
… +21 more rows
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I. Basic Information for CVE-2026-46146

Vulnerability Information
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Vulnerability Title
ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3() The convert_chmap_v3() has a loop with its increment size of cs_desc->wLength, but we forgot to validate cs_desc->wLength itself, which may lead to potential endless loop by a malformed descriptor. Add a proper size check to abort the loop for plugging the hole.
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ALSA usb-audio中convert_chmap_v3()函数未验证cs_desc->wLength值，可能导致无限循环。
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 786571b10b1ae6d90e1242848ce78ee7e1d493c4 ~ 076d5d13eb9c1ad259a7f246149f6676c62285f9 -
Linux Linux 6.17 -

II. Public POCs for CVE-2026-46146

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III. Intelligence Information for CVE-2026-46146

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Patches & Fixes for CVE-2026-46146 (8)

Same Patch Batch · Linux · 2026-05-28 · 135 CVEs total

CVE-2026-46195 9.8 CRITICAL smb: client: validate dacloffset before building DACL pointers
CVE-2026-46135 9.8 CRITICAL nvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-46137 9.8 CRITICAL mptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-46115 9.8 CRITICAL block: add pgmap check to biovec_phys_mergeable
CVE-2026-46155 9.1 CRITICAL smb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-46185 9.1 CRITICAL smb/client: fix out-of-bounds read in symlink_data()
CVE-2026-46119 9.1 CRITICAL libceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-46238 8.8 HIGH batman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-46174 8.8 HIGH x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-46125 8.8 HIGH wifi: mac80211: remove station if connection prep fails
CVE-2026-46198 8.8 HIGH batman-adv: fix integer overflow on buff_pos
CVE-2026-46166 8.8 HIGH wifi: mac80211: use safe list iteration in radar detect work
CVE-2026-46212 8.8 HIGH batman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-46152 8.8 HIGH wifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-46113 8.8 HIGH KVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-46138 8.1 HIGH Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-46232 8.1 HIGH HID: playstation: Clamp num_touch_reports
CVE-2026-46157 7.8 HIGH ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger
CVE-2026-46176 7.8 HIGH RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init()
CVE-2026-46215 7.8 HIGH drm: Set old handle to NULL before prime swap in change_handle

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46146

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