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CVE-2026-52963— ALSA: usb-audio: Bound MIDI endpoint descriptor scans

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基金会开源的操作系统Linux所使用的内核。 Linux kernel 5.7版本存在安全漏洞，该漏洞源于MIDI端点描述符扫描过程中bLength长度验证不足，可能导致越界读取。

AI Predicted 5.5 Difficulty: Hard EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1200 · Hardware Additions

Affected Version Matrix 28

VendorProduct Version RangeStatus
Linux Linux 5c6cd7021a05a02fcf37f360592d7c18d4d807fb< e2f1260a056eb3215c13c48c5378f3e4112dc3af affected
5c6cd7021a05a02fcf37f360592d7c18d4d807fb< c65b137d351e21cbc5630e73ef0eb1e1d75f5b20 affected
5c6cd7021a05a02fcf37f360592d7c18d4d807fb< 728ab0c72e49ca27185067984cd565425eb69b2e affected
5c6cd7021a05a02fcf37f360592d7c18d4d807fb< 3d3b2b01a3e73828e201ece96f863e7a3e0cdc6e affected
5c6cd7021a05a02fcf37f360592d7c18d4d807fb< a0226560540c16717efcceaf15c862cf115b01d3 affected
5c6cd7021a05a02fcf37f360592d7c18d4d807fb< 09141583bd97f4bbd7358e29fd138fe798467cdb affected
5c6cd7021a05a02fcf37f360592d7c18d4d807fb< c59159ce10e75b568cd0d4b29efcb0fb0ddecc94 affected
5c6cd7021a05a02fcf37f360592d7c18d4d807fb< d6854daa67be623860f4e1873fd3d3c275aba4ed affected
… +20 more rows
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I. Basic Information for CVE-2026-52963

Vulnerability Information
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Vulnerability Title
ALSA: usb-audio: Bound MIDI endpoint descriptor scans
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Bound MIDI endpoint descriptor scans snd_usbmidi_get_ms_info() validates the internal MIDIStreaming endpoint descriptor size before using baAssocJackID[], but the descriptor walker can still return a class-specific endpoint descriptor whose bLength exceeds the remaining bytes in the endpoint-extra scan. That leaves later flexible-array reads bounded by bLength, but not by the remaining bytes in the endpoint-extra scan. Stop walking when bLength is zero or extends past the remaining endpoint-extra scan.
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基金会开源的操作系统Linux所使用的内核。 Linux kernel 5.7版本存在安全漏洞，该漏洞源于MIDI端点描述符扫描过程中bLength长度验证不足，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 5c6cd7021a05a02fcf37f360592d7c18d4d807fb ~ e2f1260a056eb3215c13c48c5378f3e4112dc3af -
Linux Linux 5.7 -

II. Public POCs for CVE-2026-52963

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III. Intelligence Information for CVE-2026-52963

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Patches & Fixes for CVE-2026-52963 (8)

Same Patch Batch · Linux · 2026-06-24 · 219 CVEs total

CVE-2026-53049 9.8 CRITICAL gfs2: add some missing log locking
CVE-2026-52993 9.8 CRITICAL tipc: fix double-free in tipc_buf_append()
CVE-2026-52989 9.8 CRITICAL nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
CVE-2026-52986 9.8 CRITICAL netfilter: nf_conntrack_sip: don't use simple_strtoul
CVE-2026-52982 9.8 CRITICAL net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()
CVE-2026-53002 9.8 CRITICAL netfilter: conntrack: remove sprintf usage
CVE-2026-53006 9.8 CRITICAL ipv6: fix possible UAF in icmpv6_rcv()
CVE-2026-53045 9.8 CRITICAL memory: tegra124-emc: Fix dll_change check
CVE-2026-53086 9.8 CRITICAL net: bcmgenet: fix racing timeout handler
CVE-2026-53046 9.8 CRITICAL ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine
CVE-2026-52955 9.8 CRITICAL libceph: Fix potential out-of-bounds access in crush_decode()
CVE-2026-53010 9.8 CRITICAL ksmbd: fix use-after-free in smb2_open during durable reconnect
CVE-2026-53088 9.8 CRITICAL net: bcmgenet: fix off-by-one in bcmgenet_put_txcb
CVE-2026-52914 9.8 CRITICAL batman-adv: fix fragment reassembly length accounting
CVE-2026-53055 9.8 CRITICAL crypto: hisilicon/sec2 - prevent req used-after-free for sec
CVE-2026-52924 9.8 CRITICAL sctp: purge outqueue on stale COOKIE-ECHO handling
CVE-2026-52931 9.8 CRITICAL batman-adv: tp_meter: avoid use of uninit sender vars
CVE-2026-52999 9.1 CRITICAL netfilter: nfnetlink_osf: fix out-of-bounds read on option matching
CVE-2026-53043 9.1 CRITICAL ocfs2/dlm: validate qr_numregions in dlm_match_regions()
CVE-2026-52958 9.1 CRITICAL libceph: Fix potential out-of-bounds access in osdmap_decode()

Showing top 20 of 219 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-52963

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