{
  "cveId": "CVE-2026-80979",
  "url": "https://patchblox.com/security/cve/CVE-2026-80979",
  "summary": "CVE-2026-80979 is fixed in 17 products on 1 platform, first by DEBIAN-CVE-2026-80979, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "net/smc: unregister the connection before draining the rx tasklet",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net/smc: unregister the connection before draining the rx tasklet  smc_conn_free() calls smc_ism_unset_conn() only while the link group is still on its device list, and never sets conn-\u003Ekilled. smc_lgr_terminate_sched() unlinks the group immediately and defers killing its connections to a work item, so a connection freed in that window keeps its smcd-\u003Econn[] slot with both gates in smcd_handle_irq() open, and the device can re-arm the receive tasklet after tasklet_kill() has returned. On the DMB-nocopy path the ghost send buffer is freed right after that drain, so the re-armed tasklet dereferences it.  Unregister unconditionally and drain before the detach at both teardown sites, mirroring rmb_desc, which smc_buf_unuse() releases after the drain. Clear conn-\u003Esndbuf_desc before freeing it as well, so a reader that samples the pointer cannot get one that is already freed.",
  "published": "2026-09-11T20:19:04Z",
  "severity": "Moderate",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00129,
  "epssPercentile": 0.02528,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80979",
  "fixes": [
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  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}