vsock/virtio: flush works in dependency order

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80932
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:18:57 UTC
Updated2026-09-14 13:18:49 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 8.4 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001400000 probability, percentile 0.036590000 (date 2026-09-14)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.4HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.4HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 e059a14c1067bcc4f7b1947cd09f2baab98e340f git Not specified
CNA Linux Linux affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 531e2ac2dab1ab90a16427c4f9c86663633e9487 git Not specified
CNA Linux Linux affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 f3313d952fc380cff53db9a28451a8807aa67b43 git Not specified
CNA Linux Linux affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 b9cb4e8ba71c9fbd935d66baa71bbb0b87192c94 git Not specified
CNA Linux Linux affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 2187a56f2fd1715d54daed6392809223c60544f3 git Not specified
CNA Linux Linux affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 165a330a68b5f299d8735f0194c314cb2e571269 git Not specified
CNA Linux Linux affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 da5e9f08714c19ba04e6863aca69d40f042f2e04 git Not specified
CNA Linux Linux affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 728836ebca239810f164262b10211ef59182f811 git Not specified
CNA Linux Linux affected 4.8 Not specified
CNA Linux Linux unaffected 4.8 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.109 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/165a330a68b5f299d8735f0194c314cb2e571269 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/da5e9f08714c19ba04e6863aca69d40f042f2e04 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/531e2ac2dab1ab90a16427c4f9c86663633e9487 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2187a56f2fd1715d54daed6392809223c60544f3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e059a14c1067bcc4f7b1947cd09f2baab98e340f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f3313d952fc380cff53db9a28451a8807aa67b43 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/728836ebca239810f164262b10211ef59182f811 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b9cb4e8ba71c9fbd935d66baa71bbb0b87192c94 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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