{
  "cveId": "CVE-2026-90111",
  "url": "https://patchblox.com/security/cve/CVE-2026-90111",
  "summary": "CVE-2026-90111 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-90111, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ip6mr: do not clone dst in ip6mr_cache_report()...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ip6mr: do not clone dst in ip6mr_cache_report()  IPv6 input attaches a non-refcounted (NOREF) dst to skbs under RCU. When an ingress multicast packet misses MFC lookup, ip6mr_cache_unresolved() places the skb onto the unresolved queue, escaping the receive-side RCU grace period.  If the underlying route is deleted and freed, and the MFC queue is later resolved with a wrong parent interface, ip6_mr_forward() invokes ip6mr_cache_report(..., MRT6MSG_WRONGMIF), which executes dst_clone(skb_dst(pkt)) on the freed dst entry, triggering a slab use-after-free.  Report packets queued to mroute6_sk (a raw socket) and netlink notifications do not require an attached dst entry.  Fix this by: 1. Removing dst_clone() in ip6mr_cache_report() and ensuring report skbs    do not hold a dst. 2. Dropping skb_dst before queuing unresolved skbs in    ip6mr_cache_unresolved(), matching the fact that multicast    forwarding resolves outgoing routes anew via ip6_route_output().",
  "published": "2026-09-17T17:17:03Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00171,
  "epssPercentile": 0.06512,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-90111",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90111",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-90111",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90111",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}