CVE-2026-80932vsock/virtio: flush works in dependency order
- 8.4HighCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 16 days later
· 16 days later
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.4.
Affected products
- affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 – < e059a14c1067bcc4f7b1947cd09f2baab98e340f
- affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 – < 531e2ac2dab1ab90a16427c4f9c86663633e9487
- affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 – < f3313d952fc380cff53db9a28451a8807aa67b43
- affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 – < b9cb4e8ba71c9fbd935d66baa71bbb0b87192c94
- affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 – < 2187a56f2fd1715d54daed6392809223c60544f3
- affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 – < 165a330a68b5f299d8735f0194c314cb2e571269
- affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 – < da5e9f08714c19ba04e6863aca69d40f042f2e04
- affected 0ea9e1d3a9e3ef7d2a1462d3de6b95131dc7d872 – < 728836ebca239810f164262b10211ef59182f811
- affected 4.8
- unaffected < 4.8
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/e059a14c1067bcc4f7b1947cd09f2baab98e340f (opens in a new tab)
- https://git.kernel.org/stable/c/531e2ac2dab1ab90a16427c4f9c86663633e9487 (opens in a new tab)
- https://git.kernel.org/stable/c/f3313d952fc380cff53db9a28451a8807aa67b43 (opens in a new tab)
- https://git.kernel.org/stable/c/b9cb4e8ba71c9fbd935d66baa71bbb0b87192c94 (opens in a new tab)
- https://git.kernel.org/stable/c/2187a56f2fd1715d54daed6392809223c60544f3 (opens in a new tab)
- https://git.kernel.org/stable/c/165a330a68b5f299d8735f0194c314cb2e571269 (opens in a new tab)
- https://git.kernel.org/stable/c/da5e9f08714c19ba04e6863aca69d40f042f2e04 (opens in a new tab)
- https://git.kernel.org/stable/c/728836ebca239810f164262b10211ef59182f811 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76255 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-80932)Record last updated .