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CVE-2026-74614— vsock/virtio: read virtqueues under worker locks

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基金会开源的一个操作系统内核。 Linux kernel 5.19版本存在安全漏洞，该漏洞源于vsock/virtio的RX、TX和事件工作线程在锁定并检查运行标志之前读取virtqueue，导致在设备冻结和恢复期间保留已删除队列的指针，可能造成释放后重用。

CVSS 8.4 · High EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 17

VendorProduct Version RangeStatus
Linux Linux 762c251c7f5c4ee5bef71460c6e822ed293fd69f< 941329ce14c5f481223a10d1d4c8b57ea7f3048a affected
bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c< 29dd10583bf9d2744cd84b862e4257c0a5699570 affected
bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c< a1fb0c5b8a7c2753758aeced40971f99449dde0c affected
bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c< eae099c764c7ebdb842eb1f638913e310bdd6513 affected
bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c< bd43a7ec668be428265b3209eb43647aedcf720a affected
bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c< 1cecb4202afdbeddcf29d59baf596ac6ab753f7f affected
bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c< ebac8f6b1ef0e9278afe204b8692a7479988dace affected
5.15.138< 5.15.216 affected
… +9 more rows
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I. Basic Information for CVE-2026-74614

Vulnerability Information
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Vulnerability Title
vsock/virtio: read virtqueues under worker locks
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: read virtqueues under worker locks Commit bd50c5dc182b ("vsock/virtio: add support for device suspend/resume") made the *_run flags transition from false to true when restore installs replacement virtqueues. The RX, TX and event workers read their virtqueue before locking and checking the corresponding flag, so a worker delayed across freeze and restore can observe the replacement queue's running state while retaining a pointer to the deleted queue. Read each virtqueue under its mutex after checking the run flag, keeping the pointer and state in the same queue generation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/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基金会开源的一个操作系统内核。 Linux kernel 5.19版本存在安全漏洞，该漏洞源于vsock/virtio的RX、TX和事件工作线程在锁定并检查运行标志之前读取virtqueue，导致在设备冻结和恢复期间保留已删除队列的指针，可能造成释放后重用。
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 762c251c7f5c4ee5bef71460c6e822ed293fd69f ~ 941329ce14c5f481223a10d1d4c8b57ea7f3048a -
Linux Linux 5.19 -

II. Public POCs for CVE-2026-74614

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III. Intelligence Information for CVE-2026-74614

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Patches & Fixes for CVE-2026-74614 (6)

Same Patch Batch · Linux · 2026-08-22 · 149 CVEs total

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74614

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