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CVE-2026-74642— ALSA: usb: Fix UAF at delayed release of MIDI2 EPs

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.

在 Linux 内核中，已修复以下漏洞： ALSA: usb: 修复 MIDI2 端点延迟释放时的使用-after-free（UAF）漏洞 最近对 函数中 UAF 漏洞的修复引入了另一个 UAF 问题，因为该函数尝试解引用 UMP 端点对象，但这可能在延迟上下文中执行，而此时端点已被释放。 添加 回调以清除相关数据，从而避免在延迟释放时再次解引用。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 9

VendorProduct Version RangeStatus
Linux Linux 49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37< d431941825d357be7d9ab0cb7505e3a1963bd89e affected
8a7a33b846d6ba695891b8d0040027cdbad8cd52< 422d8a02de5ce6a29d616d55e5ead5dec69ac1d7 affected
cc014ebf803174f0e5d15956dfc5a38413c945ae< d217d723c5e43881b952cdb978477f7f2dc0b6d7 affected
ae388c0e1bf727972096f770f82d12e4f748d1b6< f9d492a39ebeb1a56f13ec6dd165a18a48dec812 affected
4a05b2d1b4642df74f30b6f54843e825c4a2bfd3< f8a80cfb68613fb7e6452b66447dbc63f435d140 affected
6.6.151< 6.6.152 affected
6.12.103< 6.12.104 affected
6.18.44< 6.18.45 affected
… +1 more rows
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I. Basic Information for CVE-2026-74642

Vulnerability Information
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Vulnerability Title
ALSA: usb: Fix UAF at delayed release of MIDI2 EPs
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb: Fix UAF at delayed release of MIDI2 EPs The recent fix for UAF in ump_to_endpoint() caused another UAF because it tries to dereference the UMP endpoint object, but this might be executed at a delayed context where the endpoint has been already released. Add private_free to clear the associated data for avoiding the further dereference for delayed releases.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37 ~ d431941825d357be7d9ab0cb7505e3a1963bd89e -
Linux Linux 6.6.151 ~ 6.6.152 -

II. Public POCs for CVE-2026-74642

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III. Intelligence Information for CVE-2026-74642

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Patches & Fixes for CVE-2026-74642 (5)

Same Patch Batch · Linux · 2026-08-22 · 150 CVEs total

CVE-2026-74705 10.0 CRITICAL udp: fix potential use-after-free in tunnel segmentation
CVE-2026-74612 10.0 CRITICAL veth: fix skb length accounting after XDP frag adjustment
CVE-2026-74608 9.8 CRITICAL smb: client: Fix use-after-free in cifs_try_adding_channels()
CVE-2026-74591 9.8 CRITICAL mm/filemap: __filemap_add_folio() restore index before retrying
CVE-2026-74611 9.8 CRITICAL tls: rx: restore msg_iter before TLS 1.3 optimistic retry
CVE-2026-74628 9.8 CRITICAL net/x25: fix use-after-free of the socket by its timers
CVE-2026-74669 9.8 CRITICAL ipvs: clear IPv4 options after rebasing tunnel ICMP errors
CVE-2026-74597 9.8 CRITICAL ip6_tunnel: clear skb2->cb[] in ip6ip6_err()
CVE-2026-74662 9.8 CRITICAL inet: frags: publish queues before arming timer
CVE-2026-74587 9.8 CRITICAL sctp: fix use-after-free of cached ASCONF chunk
CVE-2026-74688 9.8 CRITICAL sctp: clear control chunk transport if it is being removed
CVE-2026-74723 9.8 CRITICAL btrfs: lzo: reject inline extents without valid headers
CVE-2026-74730 9.8 CRITICAL NFS: Pin the 'struct nfs_server' during a FREE_STATEID call
CVE-2026-74617 9.8 CRITICAL dibs: initialise dibs->lock in dibs_dev_alloc()
CVE-2026-74727 9.8 CRITICAL ovpn: skip rehash for peers already removed from by_id
CVE-2026-74586 9.8 CRITICAL sctp: clear new_transport when removing a peer
CVE-2026-74616 9.8 CRITICAL xdp: reject clones that overrun skb_shared_info tailroom
CVE-2026-74588 9.8 CRITICAL sctp: keep chunk->transport in step with the list it is queued on
CVE-2026-74712 9.3 CRITICAL vdpa/mlx5: Fix buffer length in create_direct_keys()
CVE-2026-74665 9.1 CRITICAL net: fix skb length accounting after generic XDP frag adjustment

Showing top 20 of 150 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74642

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