{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.170-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.85-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.19.11-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  af_key: validate families in pfkey_send_migrate()  syzbot was able to trigger a crash in skb_put() [1]  Issue is that pfkey_send_migrate() does not check old/new families, and that set_ipsecrequest() @family argument was truncated, thus possibly overfilling the skb.  Validate families early, do not wait set_ipsecrequest().  [1]  skbuff: skb_over_panic: text:ffffffff8a752120 len:392 put:16 head:ffff88802a4ad040 data:ffff88802a4ad040 tail:0x188 end:0x180 dev:\u003cNULL\u003e  kernel BUG at net/core/skbuff.c:214 ! Call Trace:  \u003cTASK\u003e   skb_over_panic net/core/skbuff.c:219 [inline]   skb_put+0x159/0x210 net/core/skbuff.c:2655   skb_put_zero include/linux/skbuff.h:2788 [inline]   set_ipsecrequest net/key/af_key.c:3532 [inline]   pfkey_send_migrate+0x1270/0x2e50 net/key/af_key.c:3636   km_migrate+0x155/0x260 net/xfrm/xfrm_state.c:2848   xfrm_migrate+0x2140/0x2450 net/xfrm/xfrm_policy.c:4705   xfrm_do_migrate+0x8ff/0xaa0 net/xfrm/xfrm_user.c:3150",
  "id": "DEBIAN-CVE-2026-31515",
  "modified": "2026-09-14T16:47:36.653901612Z",
  "published": "2026-04-22T14:16:50.940Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-31515"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-31515"
  ]
}