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CVE-2024-56532— ALSA: us122l: Use snd_card_free_when_closed() at disconnection

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:us122l模块中USB断开回调中不当使用snd_card_free，可能导致软锁。

AI Predicted 3.3 Difficulty: Moderate EPSS 0.22% · P11

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 030a07e441296c372f946cd4065b5d831d8dc40c< 020cbc4d7414f0962004213e2b7bc5cc607e9ec7 affected
030a07e441296c372f946cd4065b5d831d8dc40c< 75f418b249d84021865eaa59515d3ed9b75ce4d6 affected
030a07e441296c372f946cd4065b5d831d8dc40c< bf0aa35a7cb8602cccf2387712114e836f65c154 affected
030a07e441296c372f946cd4065b5d831d8dc40c< 9a48bd2184b142c92a4e17eac074c61fcf975bc9 affected
030a07e441296c372f946cd4065b5d831d8dc40c< bc778ad3e495333eebda36fe91d5b2c93109cc16 affected
030a07e441296c372f946cd4065b5d831d8dc40c< 2938dd2648522336133c151dd67bb9bf01cbd390 affected
030a07e441296c372f946cd4065b5d831d8dc40c< 9b27924dc8d7f8a8c35e521287d4ccb9a006e597 affected
030a07e441296c372f946cd4065b5d831d8dc40c< 9d5c530e4d70f64b1114f2cc29ac690ba7ac4a38 affected
… +12 more rows
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I. Basic Information for CVE-2024-56532

Vulnerability Information
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Vulnerability Title
ALSA: us122l: Use snd_card_free_when_closed() at disconnection
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: us122l: Use snd_card_free_when_closed() at disconnection The USB disconnect callback is supposed to be short and not too-long waiting. OTOH, the current code uses snd_card_free() at disconnection, but this waits for the close of all used fds, hence it can take long. It eventually blocks the upper layer USB ioctls, which may trigger a soft lockup. An easy workaround is to replace snd_card_free() with snd_card_free_when_closed(). This variant returns immediately while the release of resources is done asynchronously by the card device release at the last close. The loop of us122l->mmap_count check is dropped as well. The check is useless for the asynchronous operation with *_when_closed().
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:us122l模块中USB断开回调中不当使用snd_card_free，可能导致软锁。
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 030a07e441296c372f946cd4065b5d831d8dc40c ~ 020cbc4d7414f0962004213e2b7bc5cc607e9ec7 -
Linux Linux 2.6.28 -

II. Public POCs for CVE-2024-56532

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III. Intelligence Information for CVE-2024-56532

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Patches & Fixes for CVE-2024-56532 (9)

Same Patch Batch · Linux · 2024-12-27 · 221 CVEs total

CVE-2024-56640 9.8 CRITICAL net/smc: fix LGR and link use-after-free issue
CVE-2024-53209 9.8 CRITICAL bnxt_en: Fix receive ring space parameters when XDP is active
CVE-2024-53206 9.8 CRITICAL tcp: Fix use-after-free of nreq in reqsk_timer_handler().
CVE-2024-53169 9.8 CRITICAL nvme-fabrics: fix kernel crash while shutting down controller
CVE-2024-53186 9.8 CRITICAL ksmbd: fix use-after-free in SMB request handling
CVE-2024-56645 9.8 CRITICAL can: j1939: j1939_session_new(): fix skb reference counting
CVE-2024-53179 9.8 CRITICAL smb: client: fix use-after-free of signing key
CVE-2024-56656 9.8 CRITICAL bnxt_en: Fix aggregation ID mask to prevent oops on 5760X chips
CVE-2024-53177 9.8 CRITICAL smb: prevent use-after-free due to open_cached_dir error paths
CVE-2024-53176 9.8 CRITICAL smb: During unmount, ensure all cached dir instances drop their dentry
CVE-2024-56653 8.8 HIGH Bluetooth: btmtk: avoid UAF in btmtk_process_coredump
CVE-2024-53237 8.8 HIGH Bluetooth: fix use-after-free in device_for_each_child()
CVE-2024-53224 8.8 HIGH RDMA/mlx5: Move events notifier registration to be after device registration
CVE-2024-56669 8.8 HIGH iommu/vt-d: Remove cache tags before disabling ATS
CVE-2024-56626 8.8 HIGH ksmbd: fix Out-of-Bounds Write in ksmbd_vfs_stream_write
CVE-2024-56591 8.8 HIGH Bluetooth: hci_conn: Use disable_delayed_work_sync
CVE-2024-56651 8.8 HIGH can: hi311x: hi3110_can_ist(): fix potential use-after-free
CVE-2024-56627 8.1 HIGH ksmbd: fix Out-of-Bounds Read in ksmbd_vfs_stream_read
CVE-2024-56652 7.8 HIGH drm/xe/reg_sr: Remove register pool
CVE-2024-56606 7.8 HIGH af_packet: avoid erroring out after sock_init_data() in packet_create()

Showing top 20 of 221 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-56532

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