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CVE-2024-56531— ALSA: caiaq: 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:caiaq模块中USB断开时未使用snd_card_free_when_closed，可能导致软锁。

CVSS 7.8 · High EPSS 0.22% · P12

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 523f1dce37434a9a6623bf46e7893e2b4b10ac3c< 3993edf44d3df7b6e8c753eac6ac8783473fcbab affected
523f1dce37434a9a6623bf46e7893e2b4b10ac3c< ebad462eec93b0f701dfe4de98990e7355283801 affected
523f1dce37434a9a6623bf46e7893e2b4b10ac3c< 4dd821dcbfcecf7af6a08370b0b217cde2818acf affected
523f1dce37434a9a6623bf46e7893e2b4b10ac3c< cadf1d8e9ddcd74584ec961aeac14ac549b261d8 affected
523f1dce37434a9a6623bf46e7893e2b4b10ac3c< 237f3faf0177bdde728fa3106d730d806436aa4d affected
523f1dce37434a9a6623bf46e7893e2b4b10ac3c< 4507a8b9b30344c5ddd8219945f446d47e966a6d affected
523f1dce37434a9a6623bf46e7893e2b4b10ac3c< dd0de8cb708951cebf727aa045e8242ba651bb52 affected
523f1dce37434a9a6623bf46e7893e2b4b10ac3c< a3f9314752dbb6f6aa1f0f2b4c58243bda800738 affected
… +12 more rows
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I. Basic Information for CVE-2024-56531

Vulnerability Information
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Vulnerability Title
ALSA: caiaq: 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: caiaq: 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. This patch also splits the code to the disconnect and the free phases; the former is called immediately at the USB disconnect callback while the latter is called from the card destructor.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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:caiaq模块中USB断开时未使用snd_card_free_when_closed，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 523f1dce37434a9a6623bf46e7893e2b4b10ac3c ~ 3993edf44d3df7b6e8c753eac6ac8783473fcbab -
Linux Linux 2.6.22 -

II. Public POCs for CVE-2024-56531

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III. Intelligence Information for CVE-2024-56531

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Patches & Fixes for CVE-2024-56531 (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-2024-56645 9.8 CRITICAL can: j1939: j1939_session_new(): fix skb reference counting
CVE-2024-53169 9.8 CRITICAL nvme-fabrics: fix kernel crash while shutting down controller
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-2024-56656 9.8 CRITICAL bnxt_en: Fix aggregation ID mask to prevent oops on 5760X chips
CVE-2024-53186 9.8 CRITICAL ksmbd: fix use-after-free in SMB request handling
CVE-2024-53176 9.8 CRITICAL smb: During unmount, ensure all cached dir instances drop their dentry
CVE-2024-53177 9.8 CRITICAL smb: prevent use-after-free due to open_cached_dir error paths
CVE-2024-53179 9.8 CRITICAL smb: client: fix use-after-free of signing key
CVE-2024-56591 8.8 HIGH Bluetooth: hci_conn: Use disable_delayed_work_sync
CVE-2024-56626 8.8 HIGH ksmbd: fix Out-of-Bounds Write in ksmbd_vfs_stream_write
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-2024-56651 8.8 HIGH can: hi311x: hi3110_can_ist(): fix potential use-after-free
CVE-2024-56653 8.8 HIGH Bluetooth: btmtk: avoid UAF in btmtk_process_coredump
CVE-2024-56669 8.8 HIGH iommu/vt-d: Remove cache tags before disabling ATS
CVE-2024-56627 8.1 HIGH ksmbd: fix Out-of-Bounds Read in ksmbd_vfs_stream_read
CVE-2024-53232 7.8 HIGH iommu/s390: Implement blocking domain
CVE-2024-56608 7.8 HIGH drm/amd/display: Fix out-of-bounds access in 'dcn21_link_encoder_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-2024-56531

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