vsock/virtio: flush works in dependency order
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.
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",
"version": "0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872",
"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
- Added to Heist Feed
- Publisher date