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CVE-2026-46214— vsock/virtio: fix accept queue count leak on transport mismatch

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vsock/virtio驱动中传输不匹配时接受队列计数泄漏，可能导致拒绝服务。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.13% · P3

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< 2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< fd51e810affa38d735d04261e673b2a5fe9c8665 affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< f66c7904fb6f0e420a654bc90909e64a25d00896 affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< 65c484726e74013a2ec7ba67a34d87760ae8f390 affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< 29371f3cc83e2a92265b4768014a30b80234112f affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< e9edf9893cf26d060705c910a9b62d8cc96ed56a affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< 6d3275fc4ed968938e1d556c344798046776668d affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< 52bcb57a4e8a0865a76c587c2451906342ae1b2d affected
… +10 more rows
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I. Basic Information for CVE-2026-46214

Vulnerability Information
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Vulnerability Title
vsock/virtio: fix accept queue count leak on transport mismatch
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix accept queue count leak on transport mismatch virtio_transport_recv_listen() calls sk_acceptq_added() before vsock_assign_transport(). If vsock_assign_transport() fails or selects a different transport, the error path returns without calling sk_acceptq_removed(), permanently incrementing sk_ack_backlog. After approximately backlog+1 such failures, sk_acceptq_is_full() returns true, causing the listener to reject all new connections. Fix by moving sk_acceptq_added() to after the transport validation, matching the pattern used by vmci_transport and hyperv_transport.
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vsock/virtio驱动中传输不匹配时接受队列计数泄漏，可能导致拒绝服务。
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 c0cfa2d8a788fcf45df5bf4070ab2474c88d543a ~ 2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f -
Linux Linux 5.5 -

II. Public POCs for CVE-2026-46214

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III. Intelligence Information for CVE-2026-46214

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Patches & Fixes for CVE-2026-46214 (8)

Same Patch Batch · Linux · 2026-05-28 · 135 CVEs total

CVE-2026-46135 9.8 CRITICAL nvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-46137 9.8 CRITICAL mptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-46115 9.8 CRITICAL block: add pgmap check to biovec_phys_mergeable
CVE-2026-46195 9.8 CRITICAL smb: client: validate dacloffset before building DACL pointers
CVE-2026-46155 9.1 CRITICAL smb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-46119 9.1 CRITICAL libceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-46185 9.1 CRITICAL smb/client: fix out-of-bounds read in symlink_data()
CVE-2026-46125 8.8 HIGH wifi: mac80211: remove station if connection prep fails
CVE-2026-46166 8.8 HIGH wifi: mac80211: use safe list iteration in radar detect work
CVE-2026-46198 8.8 HIGH batman-adv: fix integer overflow on buff_pos
CVE-2026-46174 8.8 HIGH x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-46238 8.8 HIGH batman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-46152 8.8 HIGH wifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-46212 8.8 HIGH batman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-46113 8.8 HIGH KVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-46232 8.1 HIGH HID: playstation: Clamp num_touch_reports
CVE-2026-46138 8.1 HIGH Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-46157 7.8 HIGH ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger
CVE-2026-46129 7.8 HIGH btrfs: fix double free in create_space_info() error path
CVE-2026-46227 7.8 HIGH sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46214

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