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

AI Predicted 5.3 Difficulty: Moderate EPSS 0.02% · P7

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinuxc0cfa2d8a788fcf45df5bf4070ab2474c88d543a< 2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391faffected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< fd51e810affa38d735d04261e673b2a5fe9c8665affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< f66c7904fb6f0e420a654bc90909e64a25d00896affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< 65c484726e74013a2ec7ba67a34d87760ae8f390affected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< 29371f3cc83e2a92265b4768014a30b80234112faffected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< e9edf9893cf26d060705c910a9b62d8cc96ed56aaffected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< 6d3275fc4ed968938e1d556c344798046776668daffected
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a< 52bcb57a4e8a0865a76c587c2451906342ae1b2daffected
… +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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux c0cfa2d8a788fcf45df5bf4070ab2474c88d543a ~ 2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f -
LinuxLinux 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 · 138 CVEs total

CVE-2026-461359.8 CRITICALnvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-461379.8 CRITICALmptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-461959.8 CRITICALsmb: client: validate dacloffset before building DACL pointers
CVE-2026-461159.8 CRITICALblock: add pgmap check to biovec_phys_mergeable
CVE-2026-461859.1 CRITICALsmb/client: fix out-of-bounds read in symlink_data()
CVE-2026-461199.1 CRITICALlibceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-461559.1 CRITICALsmb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-461748.8 HIGHx86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-461988.8 HIGHbatman-adv: fix integer overflow on buff_pos
CVE-2026-461258.8 HIGHwifi: mac80211: remove station if connection prep fails
CVE-2026-462388.8 HIGHbatman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-461528.8 HIGHwifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-461138.8 HIGHKVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-461668.8 HIGHwifi: mac80211: use safe list iteration in radar detect work
CVE-2026-462128.8 HIGHbatman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-462328.1 HIGHHID: playstation: Clamp num_touch_reports
CVE-2026-461388.1 HIGHBluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-462097.8 HIGHdrm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()
CVE-2026-462087.8 HIGHbatman-adv: stop tp_meter sessions during mesh teardown
CVE-2026-462277.8 HIGHsctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL

Showing top 20 of 138 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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