CVE-2026-80932— vsock/virtio: flush works in dependency order
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存在安全漏洞，该漏洞源于virtio_vsock_remove()中工作项刷新顺序未考虑依赖关系，tx_work队列的send_pkt_work可能随后排队rx_work，刷新顺序不当导致释放后重用，可能造成内核崩溃。
Possible ATT&CK Techniques 1 AI
T1015Affected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872< e059a14c1067bcc4f7b1947cd09f2baab98e340f |
affected |
0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872< 531e2ac2dab1ab90a16427c4f9c86663633e9487 |
affected | ||
0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872< f3313d952fc380cff53db9a28451a8807aa67b43 |
affected | ||
0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872< b9cb4e8ba71c9fbd935d66baa71bbb0b87192c94 |
affected | ||
0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872< 2187a56f2fd1715d54daed6392809223c60544f3 |
affected | ||
0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872< 165a330a68b5f299d8735f0194c314cb2e571269 |
affected | ||
0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872< da5e9f08714c19ba04e6863aca69d40f042f2e04 |
affected | ||
0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872< 728836ebca239810f164262b10211ef59182f811 |
affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2026-80932
Vulnerability Information
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Vulnerability Title
vsock/virtio: flush works in dependency order
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
vsock/virtio: flush works in dependency order
virtio_vsock_remove() stops the virtqueues and then flushes each work
item before freeing the enclosing virtio_vsock. The current order does
not account for dependencies between those items: tx_work may queue
send_pkt_work, and send_pkt_work may queue rx_work.
In particular, send_pkt_work can set restart_rx and release tx_lock.
The remove path can then stop the queues and flush rx_work before
send_pkt_work queues it. Although the later send_pkt_work flush waits
for that producer to finish, nothing waits for the newly queued rx_work,
so kfree(vsock) can race with it.
KASAN reported:
BUG: KASAN: slab-use-after-free in
virtio_transport_rx_work+0x487/0x4b0
Read of size 8 at addr ffff888114c2b008 by task kworker/1:1/47
Workqueue: virtio_vsock virtio_transport_rx_work
Call Trace:
virtio_transport_rx_work+0x487/0x4b0
process_one_work+0x688/0x1120
worker_thread+0x45b/0xd10
Allocated by task 1:
virtio_vsock_probe+0xef/0x6b0
Freed by task 84:
kfree+0x131/0x3c0
virtio_vsock_remove+0xd1/0x100
Flush the works in producer-to-consumer order. virtio_vsock_vqs_del()
has already disabled the queue callbacks and cleared the run flags, so
after tx_work and send_pkt_work are drained, no source remains that can
queue rx_work after its flush.
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存在安全漏洞，该漏洞源于virtio_vsock_remove()中工作项刷新顺序未考虑依赖关系，tx_work队列的send_pkt_work可能随后排队rx_work，刷新顺序不当导致释放后重用，可能造成内核崩溃。
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
II. Public POCs for CVE-2026-80932
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-80932 (8)
Same Patch Batch · Linux · 2026-09-11 · 431 CVEs total
| CVE-2026-89688 | 9.8 CRITICAL | nfsd: drop the stateid, not the stateowner, on seqid_op replay retry |
| CVE-2026-89656 | 9.8 CRITICAL | libceph: reject buckets with mismatched CRUSH ids |
| CVE-2026-89655 | 9.8 CRITICAL | ceph: fix UAF in __kick_flushing_caps() on cf entry freed during unlock |
| CVE-2026-89658 | 9.8 CRITICAL | NFSD: Prevent client use-after-free during NFSv4.0 revoked-state cleanup |
| CVE-2026-89660 | 9.8 CRITICAL | NFSD: Prevent client use-after-free during admin state revocation |
| CVE-2026-89659 | 9.8 CRITICAL | NFSD: Prevent client use-after-free during delegation revoke |
| CVE-2026-89662 | 9.8 CRITICAL | NFSD: Prevent lock owner use-after-free during client teardown |
| CVE-2026-89669 | 9.8 CRITICAL | nfsd: initialize copy-notify stateid before publishing it |
| CVE-2026-89674 | 9.8 CRITICAL | nfsd: fix XDR length calculation in nfsd4_ff_encode_layoutget |
| CVE-2026-89675 | 9.8 CRITICAL | nfsd: fix UAF in async copy cancel and shutdown |
| CVE-2026-89676 | 9.8 CRITICAL | nfsd: fix stale s2s_cp_stateids IDR entry for async COPY |
| CVE-2026-89677 | 9.8 CRITICAL | nfsd: fix possible fh_compose of wrong dentry in nfsd4_create_file() |
| CVE-2026-89681 | 9.8 CRITICAL | nfsd: fix layout fence worker double-reference race |
| CVE-2026-89686 | 9.8 CRITICAL | nfsd: fix BUG_ON in nfsd4_alloc_layout_stateid on racing delegation revoke |
| CVE-2026-89478 | 9.8 CRITICAL | sctp: drop a chunk if its transport was removed |
| CVE-2026-89479 | 9.8 CRITICAL | sctp: stop processing a packet once its association is deleted |
| CVE-2026-89702 | 9.8 CRITICAL | nfsd: size fh_verify server sockaddr slot by xpt_locallen |
| CVE-2026-89703 | 9.8 CRITICAL | nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations |
| CVE-2026-89482 | 9.8 CRITICAL | nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone |
| CVE-2026-89708 | 9.8 CRITICAL | nfsd: RCU-protect cl_cb_session to fix use-after-free on session teardown |
Showing top 20 of 431 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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CVE-2026-98385
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bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize
Same vendor: Linux
-
CVE-2026-98385
sched/cache: Decouple sched_cache_group from mm to fix UAF -
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize
V. Comments for CVE-2026-80932
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