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vsock/virtio: flush works in dependency order

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-80932

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-80932

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872",
        "lessThan": "e059a14c1067bcc4f7b1947cd09f2baab98e340f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872",
        "lessThan": "531e2ac2dab1ab90a16427c4f9c86663633e9487",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872",
        "lessThan": "f3313d952fc380cff53db9a28451a8807aa67b43",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872",
        "lessThan": "b9cb4e8ba71c9fbd935d66baa71bbb0b87192c94",
        "versionType": "git"
      },
      {
        "status": "affected",
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        "lessThan": "2187a56f2fd1715d54daed6392809223c60544f3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872",
        "lessThan": "165a330a68b5f299d8735f0194c314cb2e571269",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872",
        "lessThan": "da5e9f08714c19ba04e6863aca69d40f042f2e04",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872",
        "lessThan": "728836ebca239810f164262b10211ef59182f811",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/vmw_vsock/virtio_transport.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.8"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.8",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/vmw_vsock/virtio_transport.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-80932

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#34893 · Revision 1
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Publisher date
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